JP5006678B2 - Hot water storage water heater - Google Patents

Description

The present invention relates to a hot water storage type hot water supply apparatus, and more specifically, a hot water storage tank connected to a hot water supply path for sending stored hot water to a heat consuming part, and heating means for heating the hot water stored in the hot water storage tank, Auxiliary heating means for heating hot water flowing through the hot water supply path, thermal load measuring means for measuring the amount of hot water supplied to the heat consuming part through the hot water supply path, and hot water supplied to the heat consuming part A target hot water supply temperature setting means capable of changing and setting the target hot water supply temperature and an operation control means for controlling the operation are provided,
The operation control means is
The amount of heat measured by the heat load measuring means is managed as time-series actual heat load data, and time-series predicted heat load data is based on the time-series actual heat load data being managed. Expected data calculation processing,
The heating operation condition is determined such that the hot water stored in the hot water tank is heated so as to be heated to the target hot water temperature and the operation merit is increased based on the time-series predicted heat load data. A heating operation control process for controlling the heating operation of the heating means,
The present invention relates to a hot water storage type hot water supply apparatus configured to execute an auxiliary heating operation control process for controlling a heating operation of the auxiliary heating means so that a temperature of hot water supplied to the heat consuming unit becomes the target hot water supply temperature. .

  Such a hot-water storage type hot-water supply device (hereinafter sometimes simply referred to as a hot-water supply device) is installed in a general household or the like, and hot water stored in a hot-water storage tank is heated by heating means, and the hot-water storage tank The hot water stored in is sent to a heat consuming part such as a kitchen or a bath through the hot water supply path. Incidentally, the heating means is configured to perform a heating action using heat generated from a combined heat and power supply device such as a fuel cell as a heat source.

  In such a hot water supply device, the heat amount of hot water supplied to the heat consuming part through the hot water supply passage is measured by the heat load measuring means, and the heat control means measures the heat amount measured by the heat load measuring means in time series. Predictive data calculation processing to obtain time-series predicted heat load data based on the time-series actual heat load data managed as heat load data, and target hot water stored in the hot water tank Heating of the heating means in a state where the heating operation is performed so as to heat to the hot water storage temperature, and in a state where the heating operation is performed under the heating operation condition obtained so as to increase the operation merit based on the time-series predicted heat load data. A heating operation control process for controlling the operation is executed.

Incidentally, the heating operation condition is a condition for determining an operation time zone in which the heating means is heated, a condition for determining a heating amount output by the heating means, and a condition for determining the amount of hot water stored in the hot water storage tank.
In addition, when the heating means is configured to be heated by using the heat generated from the combined heat and power device as a heat source, the operation merit is energy saving shown by the energy reduction amount by operating the combined heat and power device, There are the economics indicated by the energy cost reduction cost by operating the combined heat and power device, the environmental characteristics indicated by the amount of carbon dioxide reduction by operating the combined heat and power supply device, and the like.

  The target hot water supply temperature setting means is provided, for example, in a remote control operation unit of the hot water supply apparatus, and the target hot water supply temperature is changed and set by the user of the hot water supply apparatus using the target hot water supply temperature setting means. Alternatively, when hot water is supplied to a hot water consuming device such as a dishwasher by the hot water supply device, the operation control means of the hot water supply device and the operation control means of the hot water consumption device are connected in a communicable manner, and the operation control means of the hot water consumption device When the start of operation is instructed from the operation start switch of the hot water consuming device, the operation control means of the hot water supply device is instructed to set the target hot water temperature to the target hot water consumption temperature (eg, 60 ° C.) for the hot water consuming device. The hot water consuming equipment operation start switch and the hot water consuming equipment operation control means constitute the target hot water supply temperature setting means.

  When the temperature of the hot water sent from the hot water tank is lower than the target hot water temperature set by the target hot water temperature setting means, the temperature of hot water supplied to the heat consuming part is set by the operation control means as the target temperature. An auxiliary heating operation control process for controlling the heating operation of the auxiliary heating means is performed so as to obtain the hot water supply temperature.

  Incidentally, since the hot water in the hot water tank is generally heated by the heating means while being circulated through the circulation path, it is heated to the target hot water temperature (for example, 60 ° C.) stored in the hot water tank by the heating operation control process. However, the temperature of the hot water actually stored in the hot water tank (hereinafter sometimes referred to as the actual hot water temperature of the hot water tank) is slightly lower than the target hot water temperature (for example, the target hot water temperature is In the case of 60 ° C., the temperature is about 59 ° C.) Further, the actual hot water storage temperature of the hot water stored in the hot water storage tank is higher than the target hot water storage temperature immediately after being heated by the heating means and stored. However, the temperature is gradually lowered by radiating heat in a state where hot water is stored in the hot water storage tank, with the temperature slightly lower (for example, 59 ° C.).

  In such a hot water supply apparatus, conventionally, the operation control means manages all of the heat amount measured by the heat load measurement means as time-series actual heat load data in the prediction data calculation processing, and manages that. The time-series predicted heat load data is obtained based on the current time-series actual heat load data (see, for example, Patent Document 1).

JP 2006-158106 A

By the way, when hot water is supplied to a dishwasher, for example, hot water of about 60 ° C. is required, and when hot water is supplied to the dishwasher in this way, the actual hot water storage temperature (for example, 59) In some cases, a target hot water supply temperature higher than ° C) is set by the target hot water supply temperature setting means.
When an actual heat load with a temperature higher than the actual hot water storage temperature of the hot water tank is generated in this way, the heating operation of the auxiliary heating means is controlled so that the temperature of the hot water supplied to the heat consuming unit becomes the target hot water temperature. However, in such a state where the heating operation of the auxiliary heating means is performed, the amount of heat provided by the hot water in the hot water storage tank is the amount of heat obtained by subtracting the amount of heat provided by the auxiliary heating means from the actual heat load. .

However, in the conventional hot water supply apparatus, as described above, since all the heat amounts measured by the heat load measuring means are managed as time-series actual heat load data, it is more than the actual hot water storage temperature of the hot water tank. When an actual heat load at a high temperature occurs, the amount of heat obtained by adding the amount of heat provided by the auxiliary heating means to the amount of heat provided by the hot water in the hot water tank is managed as time-series actual heat load data. Based on the time-series predicted heat load data obtained from such time-series actual heat load data, the heating operation conditions are determined so as to increase the operating merit, and heating is performed under the heating operation conditions. Since the heating operation of the heating means is controlled, the heating operation of the heating means is controlled to store heat in the hot water storage tank so that the amount of heat that cannot be covered by the hot water in the hot water storage tank is generated. It becomes easy.
In other words, the temperature of hot water that can be covered by the amount of heat stored in the hot water storage tank, in other words, the temperature of hot water that can be discharged from the hot water storage tank is slightly lower than the target hot water storage temperature. When an actual heat load at a higher temperature is generated, the actual heat load is conventionally covered by the heat amount of the hot water storage tank and the heat amount generated by the auxiliary heating means. Since all of the amount of heat to be stored is stored in the hot water storage tank, there is a concern that excess heat may be generated.

  This invention is made | formed in view of this situation, The objective is to provide the hot water storage type hot-water supply apparatus which can store hot water in a hot water storage tank so that a heat surplus may be suppressed.

The first characteristic configuration of the hot water storage type hot water supply apparatus of the present invention includes a hot water storage tank connected to a hot water supply path for sending stored hot water to the heat consuming unit, and heating means for heating the hot water stored in the hot water storage tank. Auxiliary heating means for heating hot water flowing through the hot water supply passage, thermal load measuring means for measuring the amount of hot water supplied to the heat consuming portion through the hot water supply passage, and hot water supplied to the heat consuming portion Target hot water supply temperature setting means capable of changing and setting the target hot water supply temperature, and operation control means for controlling operation are provided,
The operation control means is
The amount of heat measured by the heat load measuring means is managed as time-series actual heat load data, and time-series predicted heat load data is based on the time-series actual heat load data being managed. Expected data calculation processing,
The heating operation condition is determined such that the hot water stored in the hot water tank is heated so as to be heated to the target hot water temperature and the operation merit is increased based on the time-series predicted heat load data. A heating operation control process for controlling the heating operation of the heating means,
An auxiliary heating operation control process for controlling the heating operation of the auxiliary heating means is executed so that the temperature of the hot water supplied to the heat consuming unit is the target hot water supply temperature,
In the prediction data calculation process, the operation control means
When high temperature heat load data corresponding to a state in which the target hot water supply temperature is higher than a set hot water temperature that can be discharged from the hot water storage tank exists, time-series actual heat load data excluding the high temperature heat load data is obtained. The time-series predicted heat load data is obtained as the time-series actual heat load data.

  That is, when a target hot water temperature higher than the set hot water temperature that can be discharged from the hot water storage tank is set by the target hot water temperature setting means, and high temperature thermal load data corresponding to a state in which the target hot water temperature is higher than the set hot water temperature exists The time-series predicted heat load data is obtained using the time-series actual heat load data excluding the high-temperature heat load data as the time-series actual heat load data.

Then, since the heating operation condition is obtained based on the time-series predicted heat load data thus obtained, the heating operation of the heating means is performed so that the amount of heat corresponding to the high temperature heat load data is not stored in the hot water storage tank. It becomes possible to make it control, and a heat surplus can be suppressed.
Therefore, it has become possible to provide a hot water storage type hot water supply apparatus that can store hot water in a hot water storage tank so as to suppress excess heat.

A 2nd characteristic structure is a hot water storage tank to which the hot water supply path which sends out the stored hot water to a heat consumption part was connected, a heating means to heat the hot water stored in the hot water storage tank, and hot water flowing through the hot water supply path An auxiliary heating means for heating the hot water supply means, a thermal load measuring means for measuring the amount of hot water supplied to the heat consuming part through the hot water supply passage, and a target hot water supply temperature supplied to the heat consuming part can be changed and set freely. A target hot water supply temperature setting means and an operation control means for controlling the operation are provided;
The operation control means is
The amount of heat measured by the heat load measuring means is managed as time-series actual heat load data, and time-series predicted heat load data is based on the time-series actual heat load data being managed. Expected data calculation processing,
The heating operation condition is determined such that the hot water stored in the hot water tank is heated so as to be heated to the target hot water temperature and the operation merit is increased based on the time-series predicted heat load data. A heating operation control process for controlling the heating operation of the heating means,
An auxiliary heating operation control process for controlling the heating operation of the auxiliary heating means is executed so that the temperature of the hot water supplied to the heat consuming unit is the target hot water supply temperature,
In the prediction data calculation process, the operation control means
When high-temperature heat load data corresponding to a state in which the target hot-water supply temperature is higher than a set hot water temperature that can be discharged from the hot water storage tank exists, a time-series actual heat load in the generation time zone of the high-temperature heat load data The time-series actual heat load data obtained by correcting the data to the load reduction side is used as the time-series actual heat load data, and the time-series predicted heat load data is obtained. .

  That is, in the prediction data calculation process, when high-temperature heat load data corresponding to a state where the target hot-water supply temperature is higher than the set hot-water temperature exists, time-series actual heat in the generation time zone of the high-temperature heat load data The time-series actual heat load data obtained by correcting the load data to the load decreasing side is managed as the time-series actual heat load data, and the time based on the time-series actual heat load data managed as such Series predictive heat load data is required.

Then, by determining the heating operation condition based on the time-series predicted heat load data thus obtained, the amount of heat to be stored in the hot water tank corresponding to the generation time zone of the high temperature heat load data is actually Since it is possible to control the heating operation of the heating means in a state where the heat amount is smaller than the load, the heat amount smaller than the actual heat load is corresponding to the generation time zone of the high temperature heat load data. It is possible to store heat in the hot water storage tank, and it is possible to suppress excess heat.
By the way, it becomes possible to store heat in the hot water storage tank with a heat quantity smaller than the actual heat load corresponding to the generation time zone of the high temperature heat load data. Compared to the case where the corresponding heat quantity is not stored in the hot water tank, the amount of heat stored in the hot water tank can be suppressed from becoming too small for the time-series predicted heat load data. It becomes possible to reduce the energy consumption of the means and improve the driving merit.
Therefore, it has become possible to provide a hot water storage type hot water supply apparatus that can store hot water in a hot water storage tank so as to suppress excess heat.

The third feature configuration is in addition to the second feature configuration,
In the prediction data calculation process, the operation control means
By reducing the auxiliary heating amount that is the heating amount of the auxiliary heating means in the generation time zone of the high temperature thermal load data, the time-series actual thermal load data in the generation time zone of the high temperature thermal load data is reduced to the load reduction side. It is characterized by being configured to correct.

  That is, in the predictive data calculation process, by subtracting the auxiliary heating amount that is the heating amount of the auxiliary heating means in the generation time zone of the high temperature thermal load data, the time series actual heat load in the generation time zone of the high temperature thermal load data is reduced. Data is corrected to the load decreasing side.

Then, the time-series predicted heat load data is obtained based on the time-series actual heat load data corrected and managed as described above, and the time-series predicted heat load data thus obtained is obtained. Therefore, the amount of heat to be stored in the hot water tank corresponding to the generation time zone of the high-temperature heat load data is reduced to the amount of heat obtained by subtracting the amount of heat provided by the auxiliary heating means from the actual heat load. Since it is possible to control the heating operation of the heating means with the heat quantity as close as possible, the auxiliary heating means will cover the actual heat load corresponding to the generation time zone of the high temperature thermal load data. It is possible to store heat in the hot water tank as close as possible to the amount of heat obtained by subtracting the amount of heat dissipated, and to suppress excess heat.
In addition, it is possible to store heat in the hot water tank as close as possible to the amount of heat obtained by subtracting the amount of heat provided by the auxiliary heating means from the actual heat load, thereby further reducing the energy consumption of the auxiliary heating means. Therefore, the driving merit can be further improved.
Accordingly, hot water can be stored in the hot water storage tank so as to suppress excessive heat while further improving the operation merit.

In addition to the third feature configuration, the fourth feature configuration is
Water is mixed with hot water flowing at a location upstream or downstream of the auxiliary heating means in the hot water supply passage, and water mixing means capable of adjusting the mixing amount of the water is provided,
In the prediction data calculation process, the operation control unit uses the minimum heating amount in the heating amount adjustment range of the auxiliary heating unit or a heating amount close to the minimum heating amount as the auxiliary heating amount, and the generation time of the high-temperature heat load data It is characterized in that it is configured to correct the time-series actual heat load data in the band to the load decreasing side.

  That is, in the predictive data calculation process, the minimum heating amount in the heating amount adjustment range of the auxiliary heating means or a heating amount close to the minimum heating amount is set as the auxiliary heating amount in a time-series manner in the generation time zone of the high temperature thermal load data. The thermal load data is corrected to the load decreasing side.

Normally, even if the target hot water supply temperature setting means allows a target hot water supply temperature higher than the set hot water temperature to be set, the range in which the target hot water supply temperature is allowed to be set higher than the set hot water temperature is auxiliary. When the heating means is heated at the minimum heating amount, it is set to a temperature that can raise the temperature of the hot water delivered from the hot water storage tank at the set hot water temperature.
And in the generation time zone of the high temperature heat load data, the hot water supplied to the heat consuming part when the auxiliary heating means is heated at the minimum heating amount and the auxiliary heating means is heated at the minimum heating amount. So that the water at the target hot water supply temperature is mixed with hot water flowing at a location upstream or downstream of the auxiliary heating means in the hot water supply passage by the water mixing means. It may be configured to be supplied to the heat consuming unit.
Therefore, when hot water having a target hot water supply temperature is supplied to the heat consuming unit with such a configuration, the minimum heating amount of the auxiliary heating means or a heating amount close to the minimum heating amount is set as the auxiliary heating amount, and the high temperature heat load data By configuring so that the time-series actual heat load data in the generation time zone is corrected to the load decrease side, the load reduction of the time-series actual heat load data in the generation time zone of the high-temperature heat load data Correction to the side can be performed easily.

In addition to the third feature configuration, the fifth feature configuration includes:
In the prediction data calculation process, the operation control means uses the heating amount of the auxiliary heating means for raising the set flow rate of hot and cold water as the auxiliary heating amount as a time series in the generation time zone of the high temperature thermal load data. The actual heat load data is corrected to the load decreasing side.

  That is, in the prediction data calculation processing, the actual heat load data in time series in the generation time zone of the high-temperature heat load data is obtained using the heating amount of the auxiliary heating means for raising the set flow rate of hot water and the set temperature as the auxiliary heating amount. It is corrected to the load decreasing side.

That is, in the generation time zone of the high-temperature heat load data, the auxiliary heating unit may be configured to be heated with a heating amount for raising the set flow rate of hot water or the set temperature.
Incidentally, when the temperature of the hot water supplied to the heat consuming unit becomes higher than the target hot water supply temperature when the auxiliary heating means is heated in this way, the temperature of the hot water supplied to the consuming unit is set to the target hot water supply. Water is mixed by the water mixing means at a location upstream or downstream of the auxiliary heating means in the hot water supply path so as to reach the temperature.
Therefore, in the generation time zone of the high-temperature heat load data, when the auxiliary heating means is configured to heat the hot water at the set flow rate with the heating amount for raising the set temperature, the hot water at the set flow rate is set to the set temperature. By configuring the heating amount of the auxiliary heating means to increase as the auxiliary heating amount, and correcting the time-series actual heat load data in the generation time zone of the high temperature heat load data to the load decreasing side, the high temperature heat load It is possible to easily correct the time-series actual heat load data to the load decreasing side in the data generation time zone.

In addition to any of the first to fifth feature configurations described above, the sixth feature configuration is
The heating operation condition defines at least one of a condition for determining an operation time zone for heating the heating means, a condition for determining a heating amount output by the heating means, and a condition for determining the amount of hot water stored in the hot water tank. It is characterized by a condition.

  That is, the heating operation condition is a condition that determines at least one of a condition that determines an operation time zone in which the heating means is heated, a condition that determines a heating amount output by the heating means, and a condition that determines the amount of hot water stored in the hot water tank. Therefore, at least one of the operation time zone, the heating amount, and the hot water storage heat amount of the hot water storage tank is determined so as to increase the operating merit, and the heating operation of the heating means is controlled.

In other words, for example, by setting an operation time zone in which the heating means is heated to store hot water in the hot water storage tank before the predicted heat load occurs, the heat dissipation loss from the hot water storage tank is suppressed. It is possible to improve the merit, or it is possible to improve the operation merit by suppressing the excess heat by determining the heating amount output by the heating means corresponding to the predicted heat load It is possible to reduce the excess heat by determining the amount of hot water stored in the hot water storage tank so that the amount of heat corresponding to the predicted heat load is stored in the hot water storage tank before the time when the predicted heat load occurs. Driving merits. Furthermore, it is possible to further improve the operation merit by setting any two or all of the operation time zone, the heating amount, and the hot water storage heat amount of the hot water storage tank.
Therefore, the heating operation of the heating means can be controlled so as to improve the operation merit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment in the case where a hot water storage type hot water supply apparatus according to the present invention is applied to a cogeneration system will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the cogeneration system recovers the heat generated by the fuel cell 1 as a combined heat and power generation apparatus that generates electric power and heat with cooling water, and cools the cooling. A hot water storage unit 4 that uses water to store hot water in the hot water tank 2 and supply a heat medium to the heat consuming terminal 3, and an operation control unit 5 as operation control means that controls the operation of the fuel cell 1 and the hot water storage unit 4. Etc.

Since the fuel cell 1 is well-known, a detailed description and illustration thereof will be omitted. Briefly, the fuel cell 1 includes a cell stack that generates power by being supplied with a fuel gas containing hydrogen and an oxygen-containing gas. A fuel gas generation unit that generates fuel gas to be supplied to the cell stack, a blower that supplies air as an oxygen-containing gas to the cell stack, and the like are provided.
The fuel gas generation unit includes a desulfurizer for desulfurizing a hydrocarbon-based raw fuel gas such as a supplied city gas (for example, a natural gas-based city gas), a desulfurized raw fuel gas supplied from the desulfurizer, A reformer that generates a reformed gas mainly composed of hydrogen by reforming reaction with steam supplied separately, and carbon monoxide in the reformed gas supplied from the reformer with carbon dioxide. A carbon monoxide remover that selectively oxidizes carbon monoxide in the reformed gas supplied from the transformer with selective oxidation air supplied separately. The reformed gas reduced by the shift treatment and the selective oxidation treatment is supplied to the cell stack as the fuel gas.

And it is comprised so that the electric power generation output of the said fuel cell 1 may be adjusted by adjusting the supply amount of the raw fuel gas to the said fuel gas production | generation part.
A grid interconnection inverter 6 is provided on the power output side of the fuel cell 1, and the inverter 6 has the same voltage and the same frequency as the received power for receiving the generated power of the fuel cell 1 from the commercial power supply 7. Is configured to do.
The commercial power source 7 is, for example, a single-phase three-wire system 100/200 V, and is electrically connected to a power load 9 such as a television, a refrigerator, or a washing machine via a received power supply line 8.
The inverter 6 is electrically connected to the received power supply line 8 via the generated power supply line 10, and the generated power of the fuel cell 1 is supplied to the power load 9 via the inverter 6 and the generated power supply line 10. It is comprised so that.

The received power supply line 8 is provided with power load measuring means 11 for measuring the load power of the power load 9, and the power load measuring means 11 generates a reverse power flow in the current flowing through the received power supply line 8. It is also configured to detect whether or not.
The electric power supplied from the fuel cell 1 to the received power supply line 8 is controlled by the inverter 6 so that a reverse power flow does not occur, and the surplus power of the power generation output is recovered by replacing the surplus power with heat. 12 is configured to be supplied.

The electric heater 12 is composed of a plurality of electric heaters, and is provided so as to heat the cooling water of the fuel cell 1 flowing through the cooling water circulation path 13 by the operation of the cooling water circulation pump 15, and is connected to the output side of the inverter 6. ON / OFF is switched by the actuated switch 14.
The operation switch 14 is configured to adjust the power consumption of the electric heater 12 according to the amount of surplus power so that the power consumption of the electric heater 12 increases as the amount of surplus power increases. Yes.
The configuration for adjusting the power consumption of the electric heater 12 is a configuration for adjusting the output of the electric heater 12 by, for example, phase control or the like in addition to the configuration for switching ON / OFF of the plurality of electric heaters 12 as described above. You may adopt.

  The hot water storage unit 4 stores the hot water stored in the sealed hot water tank 2 connected to the hot water supply passage 27 for sending the hot water stored therein to a heat consuming section such as a bathtub, a hot water tap, a shower, a dishwasher, and the like. The heating section H as a heating means for heating the hot water to be heated, the hot water circulation pump 17 for circulating hot water in the hot water tank 2 through the hot water circulation path 16, and the heat source circulation pump 21 for circulating hot water for heat source through the heat source circulation path 20 , A heat medium circulation pump 23 that circulates and supplies the heat medium to the heat consuming terminal 3 through the heat medium circulation path 22, a hot water storage heat exchanger 24 that heats hot water flowing through the hot water circulation path 16, and the heat source circulation path The heat source heat exchanger 25 that heats the hot water for the heat source flowing through 20, the heat exchanger for heat medium heating 26 that heats the heat medium flowing through the heat medium circulation path 22, and the hot water storage tank 2 are taken out. Through hot water supply path 27 Hot water and provided with such auxiliary heater 28 as an auxiliary heating means for heating the hot water heat source flowing through the heat source circulating passage 20 is configured to.

The hot water circulation path 16 is connected to the bottom and top of the hot water tank 2, and the hot water tank 2 is configured to return hot water taken from the bottom of the hot water tank 2 to the top of the hot water tank 2 by the hot water circulation pump 17. Hot water is circulated through the hot water circulation path 16 and the hot water circulated through the hot water circulation path 16 is heated by the heat exchanger 24 for hot water storage so that the hot water tank 2 forms a temperature stratification. Is configured to be stored in a full state.
The hot water circulation path 16 is branched and connected so that a part thereof is in parallel, a three-way valve 18 is provided at the connection location, and a radiator 19 is provided in the branched flow path. Yes. Then, by switching the three-way valve 18, the hot water taken out from the lower part of the hot water tank 2 is circulated so as to pass through the radiator 19, and the hot water taken out from the lower part of the hot water tank 2 is circulated so as to bypass the radiator 19. It is comprised so that it may switch to the state to be made to.

  The hot water supply passage 27 is connected to the hot water storage tank 2 through a location downstream of the hot water storage heat exchanger 24 in the hot water circulation passage 16, and hot water is sent to the heat consuming part through the hot water supply passage 27. Accordingly, the water supply passage 29 is connected to the bottom of the hot water tank 2 so as to supply water to the hot water tank 2.

  The heat source circulation path 20 is provided so as to form a circulation path in a state in which a part of the hot water supply path 27 is shared, and the heat source circulation path 20 is for heat source for intermittently flowing the heat source hot water. An intermittent valve 40 is provided.

The auxiliary heater 28 includes an auxiliary heating heat exchanger 28a provided in a shared portion of the hot water supply passage 27 with the heat source circulation path 20, a burner 28b for heating the auxiliary heating heat exchanger 28a, and the burner. The operation control unit 5 controls the operation of the auxiliary heater 28. The fan 28c is configured to supply combustion air to the air 28b.
Further, the mixed water channel 33 branched from the water supply channel 29 is connected to a location upstream of the auxiliary heating heat exchanger 28a in the hot water supply channel 27, that is, a location upstream of the auxiliary heater 28, A water mixing valve 34 capable of adjusting the mixing ratio of the hot water delivered from the hot water tank 2 and the water supplied from the mixing water channel 33 is provided at the connection location.
That is, the mixed water channel 33 and the water mixing valve 34 mix water with hot water flowing in a location upstream of the auxiliary heater 28 in the hot water supply channel 27 and adjust the amount of the mixed water. A flexible water mixing means B is configured.

The cooling water circulation path 13 is branched into a hot water storage heat exchanger 24 side and a heat source heat exchanger 25 side, and the flow rate of the cooling water to be passed to the hot water storage heat exchanger 24 side and the heat source use are branched at the branch points. A diversion valve 30 is provided that adjusts the ratio of the flow rate of the cooling water that flows to the heat exchanger 25 side.
The diversion valve 30 allows the entire amount of cooling water in the cooling water circulation path 13 to flow to the hot water storage heat exchanger 24 side, or allows the entire amount of cooling water in the cooling water circulation path 13 to flow to the heat source heat exchanger 25 side. It is comprised so that it can also be made.

  Cooling water recovered from the heat generated in the fuel cell 1 is circulated by the cooling water circulation pump 15 through the cooling water circulation path 13 through the hot water storage heat exchanger 24 and hot water in the hot water tank 2 is circulated. By passing the hot water storage heat exchanger 24 through the hot water circulation path 16 and circulating it, the hot water storage heat exchanger 24 stores hot water in the hot water storage tank 2 with the cooling water recovered from the generated heat of the fuel cell 1. The hot water will be heated, and the heating part H will serve as the fuel cell 1, the cooling water circulation path 13, the cooling water circulation pump 15, the hot water circulation path 16, the hot water circulation pump 17, and the hot water storage heat exchanger. 24 etc. are comprised.

In the heat source heat exchanger 25, the hot water for the heat source flowing through the heat source circulation path 20 is heated by passing the cooling water in the cooling water circulation path 13 that has recovered the heat generated by the fuel cell 1. It is configured.
In the heat exchanger 26 for heat medium heating, the heat medium flowing through the heat medium circulation path 22 is passed by flowing hot water for the heat source heated by the heat exchanger 25 for heat source or the auxiliary heater 28. It is configured to be heated. The said heat consumption terminal 3 is comprised by heating terminals, such as a floor heating apparatus and a bathroom heating apparatus.

As shown in FIG. 2, the remote control operation unit 35 of this cogeneration system includes hot water supplied to the heat consumption unit in addition to an operation switch (not shown) for instructing start and stop of operation of the cogeneration system. A hot water supply temperature setting section 36 is provided as target hot water supply temperature setting means C for setting the target hot water supply temperature.
Further, a washing operation control unit 37 (corresponding to an operation control means for hot water consuming equipment) for controlling the operation of the dishwasher W and the operation control unit 5 are connected to communicate control information and the like. When an operation start of the dishwasher W is commanded by the operation switch 38 of the dishwasher W, the operation control unit 37 is provided with a dishwasher opening / closing valve (not shown) provided in the hot water supply path 27 to the dishwasher W. And the operation control unit 5 is instructed to set the target hot water supply temperature to a target hot water supply temperature for dish washing (for example, 60 ° C.). The target hot water supply temperature setting means C is configured by the switch 38 and the cleaning operation control unit 37.
Incidentally, the maximum target hot water temperature that can be set by the target hot water temperature setting means C is sent out from the hot water storage tank 2 at the set hot water temperature when the auxiliary heater 28 is heated at the minimum combustion amount. It is set below the temperature at which the hot water can be raised. Incidentally, although the details will be described later, the set hot water temperature is the temperature of hot water stored in the hot water storage tank 2 when the heating unit H is heated.

A hot water supply heat load measuring means N is provided as a heat load measuring means for measuring the amount of hot water supplied to the heat consuming section through the hot water supply passage 27, and the terminal heat load at the heat consuming terminal 3 is measured. Terminal thermal load measuring means 32 is also provided.
The hot water supply heat load measuring means N will be described.
The operation control unit 5 calculates the amount of heat Qs (kcal / sampling time) of hot water supplied to the heat consuming unit for each sampling time, and the hot water supply temperature Ts (°) which is the temperature of hot water supplied to the heat consuming unit. C), a hot water supply flow rate Fs (liter / sampling time) which is a flow rate of hot water supplied to the heat consuming unit, and a water supply temperature Ti (° C.) to the hot water storage tank 2, It is configured to ask for. Incidentally, the sampling time is set to 5 seconds, for example.
In this embodiment, the unit of calorie may be indicated by kcal, but it is obtained as a unit of kWh by dividing each value by the coefficient α set to 860 based on the relationship of 1 kWh = 860 kcal. be able to.

  Qs = (Ts−Ti) × Fs (Equation 1)

A hot water temperature sensor 41 that detects the temperature of hot water supplied to the heat consuming unit through the hot water supply channel 27, a hot water flow rate sensor 42 that detects the flow rate of hot water supplied to the heat consuming unit through the hot water channel 27, and the water supply A water supply temperature sensor 43 for detecting the temperature of water supplied through the passage 29 is provided.
And when the said operation control part 5 calculates | requires calorie | heat amount Qs of the hot water supplied to the said heat consumption part by said Formula 1, the said hot water supply temperature Ts is made into the detection temperature of the said hot water supply temperature sensor 41, or the said target hot water supply temperature The hot water supply flow rate Fs is set to a detected flow rate of the hot water supply flow rate sensor 42 or a preset flow rate set in advance for a specific heat consumption unit. In addition, the feed water temperature Ti is set as the detected temperature of the feed water temperature sensor 43.
That is, the hot water supply thermal load measuring means N is constituted by the operation control unit 5, the hot water supply temperature sensor 41, the hot water supply flow rate sensor 42, and the water supply temperature sensor 43.

  Although not shown, the terminal thermal load measuring means 32 is an inflow temperature sensor that detects the temperature of the heat medium supplied to the heat consuming terminal 3 through the heat medium circulation path 22, and the heat from the heat consuming terminal 3. An outflow temperature sensor that detects the temperature of the heat medium flowing out to the medium circulation path 22 and a heat medium flow rate sensor that detects the flow rate of the heat medium flowing through the heat medium circulation path 22 are configured.

Further, a delivery temperature sensor So for detecting the temperature of the hot water sent from the hot water storage tank 2 is provided at a location upstream of the connection location of the mixed water channel 33 in the hot water supply channel 27, and the hot water circulation channel 16 A hot water storage temperature sensor Sh that detects the temperature of hot water heated by the hot water storage heat exchanger 24 and supplied to the hot water tank 2 is provided at a location downstream of the hot water storage heat exchanger 24.
The hot water storage tank 2 includes an upper end temperature sensor S1 for detecting the temperature of hot water at the upper end of the upper layer portion of the hot water tank 2, and a boundary between the upper layer portion and the middle layer portion of the hot water tank 2 for detecting the amount of heat stored in the hot water tank. An intermediate upper temperature sensor S2 for detecting the temperature of hot water at the position, an intermediate lower temperature sensor S3 for detecting the temperature of hot water at the boundary between the middle layer and the lower layer of the hot water tank 2, and the lower end of the lower layer of the hot water tank 2 A lower end temperature sensor S4 for detecting the temperature of the hot water at the position is provided.

A method of calculating the amount of stored hot water in the hot water storage tank 2 by the operation control unit 5 will be described.
The temperatures of the hot water in the hot water tank 2 detected by the upper end temperature sensor S1, the intermediate upper temperature sensor S2, the intermediate lower temperature sensor S3, and the lower end temperature sensor S4 are T1, T2, T3, and T4, respectively. The water supply temperature detected by the temperature sensor 43 is Ti, and the capacities of the upper layer portion, the middle layer portion, and the lower layer portion are V (liters).
Further, assuming that the weighting coefficient in the upper layer part is A1, the weighting coefficient in the middle layer part is A2, and the weighting coefficient in the lower layer part is A3, the stored hot water calorie (kcal) is calculated by the following (Equation 2). be able to.

Hot water storage heat amount = (A1 * T1 + (1-A1) * T2-Ti) * V
+ (A2 * T2 + (1-A2) * T3-Ti) * V
+ (A3 * T3 + (1-A3) * T4-Ti) * V (Equation 2)

  The weighting factors A1, A2, A3 are empirical values considering past temperature distribution data in each layer of the hot water tank 2. Here, as A1, A2, A3, for example, A1 = A2 = 0.2 and A3 = 0.5. A1 = A2 = 0.2 indicates that the influence of the temperature T2 is larger than the influence of the temperature T1 in the upper layer portion. This indicates that 80% of the upper layer is close to the temperature T2, and 20% is close to the temperature T1. The same applies to the middle layer portion. In the lower layer part, it shows that the influence of temperature T3 and T4 is the same.

Hereinafter, the control configuration of the operation control unit 5 will be described.
The operation control unit 5 manages the amount of heat measured by the hot water supply thermal load measuring means N as time-series actual hot water supply heat load data, and converts it into the time-series actual hot water supply heat load data managed. Prediction data calculation processing for obtaining time-series predicted hot water supply heat load data based on the state, in a state where the hot water stored in the hot water tank 2 is heated to be heated to a target hot water temperature, and the time series prediction A heating operation control process for hot water storage for controlling the heating operation of the heating section H in a state where the heating operation is performed under the heating operation condition obtained so as to increase the operating merit based on the hot water supply heat load data, the heat source circulation path 20 The heat source intermittent valve 40, the diverter valve 30 and the heat source circulation pump 21 are operated so as to circulate the hot water for the heat source through, and are operated based on the time-series predicted hot water supply heat load data. A heating operation control process for circulating a heating medium for controlling the heating operation of the heating unit H in a state where the heating operation is performed under the heating operation condition obtained so as to increase the lit, and hot water supplied to the heat consumption unit The auxiliary heating operation control process for controlling the heating operation of the auxiliary heater 28 is performed so that the temperature of the auxiliary heater 28 is set to the target hot water supply temperature.

The operation control unit 5 performs a hot water storage operation in which hot water is stored in the hot water tank 2 in a state where no operation command is given from a terminal remote controller (not shown) for the heat consuming terminal 3, and in the hot water storage operation, the operation control is performed. The unit 5 switches the diversion valve 30 to a state in which the entire amount of cooling water is allowed to flow to the hot water storage heat exchanger 24 side, and closes the heat source intermittent valve 40 to perform the heating operation control process for the hot water storage. Is configured to run.
In this hot water storage heating operation control process, the temperature of the hot water supplied to the hot water tank 2 is set to a preset target hot water temperature (for example, 60 ° C.) based on the detection information of the hot water temperature sensor Sh. In order to adjust the hot water circulation amount, the heating part H is heated so as to heat the hot water stored in the hot water tank 2 to a target hot water temperature by controlling the operation of the hot water circulation pump 17. become.
Then, by this hot water storage operation, hot water having a set hot water temperature set to a temperature (for example, 59 ° C.) lower than the target hot water temperature is considered in consideration of heat radiation from the hot water while flowing through the hot water circulation path 16. Hot water is stored in the hot water tank 2.

Further, when the operation is commanded from the terminal remote controller, the operation control unit 5 performs a heat medium supply operation for supplying a heat medium to the heat consuming terminal 3, and in the heat medium supply operation, the operation control unit 5 is configured to execute the heating operation control process for circulating the heat medium.
In this heating operation control process for circulating the heat medium, the heat source intermittent valve 40 is opened, the heat source circulation pump 21 is operated, and the shunt valve 30 passes the entire amount of cooling water to the heat source heat exchanger 25 side. By switching to the flow state, the heat source hot water is circulated through the heat source circulation path 20.
When the operation control unit 5 is instructed to stop the operation from the terminal remote controller during the heat medium supply operation, the operation control unit 5 causes the diverter valve 30 to pass the entire amount of cooling water to the hot water storage heat exchanger 24 side. The heat source intermittent pump 40 is closed, the heat source circulation pump 21 is stopped, and the hot water circulation pump 17 is operated to switch from the heat medium supply operation to the hot water storage operation. It is configured.

  In the heating operation control process for hot water storage, the heating part H is heated and operated under the heating operation condition obtained so as to increase the operating merit based on the time-series predicted hot water supply heat load data, and the heating medium circulation The heating operation of the heating unit H under the heating operation conditions obtained so that the operation merit is increased based on the time-series predicted hot water supply heat load data in the heating operation control process for the same is the same as below. Such a process may be referred to as a learning driving control process.

  Further, the operation control unit 5 stores hot water up to the bottom of the hot water tank 2 when the temperature detected by the lower end temperature sensor S4 is equal to or higher than a preset temperature for heat radiation operation during the hot water storage operation. Assuming that the amount of hot water stored in the tank 2 is full, the three-way valve 18 is switched to a state in which the hot water taken out from the lower part of the hot water tank 2 is circulated so as to pass through the radiator 19 and the radiator 19 is operated. After the hot water taken out from the lower part of the water is radiated by the radiator 19, the hot water is passed through the hot water storage heat exchanger 24, heated, and supplied to the hot water tank 2.

  Next, description will be added to each of the auxiliary heating operation control process, the prediction data calculation process, and the learning operation control process.

First, the auxiliary heating operation control process will be described.
In the auxiliary heating operation control process, the operation control unit 5 performs the delivery when the delivery temperature detected by the delivery temperature sensor So is lower than the target hot water supply temperature set by the target hot water supply temperature setting means C. Based on the temperature of hot water detected by the temperature sensor So and the flow rate of hot water detected by the hot water supply flow rate sensor 42, the assistance required to heat the hot water sent from the hot water tank 2 to the target hot water temperature. The required combustion amount of the heater 28 is obtained, it is determined whether or not the obtained necessary combustion amount is larger than the minimum combustion amount in the combustion amount adjustment range of the auxiliary heater 28, and the necessary combustion amount is less than the minimum combustion amount. Is larger, the combustion amount of the auxiliary heater 28 is adjusted so that the detected temperature of the hot water supply temperature sensor 41 becomes the target hot water supply temperature, and the mixed water channel 33 side is adjusted so that the mixing amount of water becomes zero. When the operation of the water mixing valve 34 is controlled so as to be closed, and the required combustion amount is less than or equal to the minimum combustion amount, the combustion amount of the auxiliary heater 28 is adjusted to the minimum combustion amount and supplied to the heat consuming unit. The operation of the water mixing valve 34 is controlled so that the temperature of the hot water becomes the target hot water supply temperature.

  In this embodiment, as the operation control unit 5 controls the operation of the water mixing valve 34 for setting the temperature of hot water supplied to the heat consuming unit to the target hot water supply temperature, the auxiliary heater 28 is set to the minimum combustion amount. The amount of water mixed by the water mixing valve 34 for heating the hot and cold water supplied to the auxiliary heater 28 to the target hot water supply temperature. The operation of the water mixing valve 34 is controlled so that the mixing amount becomes the determined mixing amount.

  When it is assumed that the auxiliary heater 28 is heated at the minimum combustion amount, the amount X of water mixed for heating the hot water supplied to the auxiliary heater 28 to the target hot water supply temperature X ( Liter / sampling time) is a target hot water supply temperature Tp (° C), a delivery temperature To detected by the delivery temperature sensor So, a hot water supply flow rate Fs detected by the hot water supply flow rate sensor 42 (liter / sampling time), Based on the feed water temperature Ti detected by the feed water temperature sensor 43 and the minimum combustion amount Imin (kcal / sampling time) of the auxiliary heater 28, the following equation 3 is obtained.

  X = {Imin−Fs (Tp−To + Ti)} ÷ (To−Ti) (Equation 3)

  Incidentally, the minimum combustion amount of the auxiliary heater 28 is 4.71 kWh, for example, and the minimum combustion amount Imin is obtained by converting this into a value of kcal unit per sampling time.

  In addition, in the auxiliary heating operation control process, the operation control unit 5 determines that the delivery temperature detected by the delivery temperature sensor So is equal to or higher than the target hot water supply temperature set by the target hot water supply temperature setting means C. The operation of the water mixing valve 34 is controlled so as to adjust the water mixing amount so that the temperature of the hot water detected by the hot water temperature sensor 41 becomes the target hot water temperature, and the auxiliary heater 28 is not heated. It is configured.

  Next, the prediction data calculation process will be described. In the prediction data calculation process, the operation control unit 5 manages and manages the time-series actual hot water supply heat load data. In addition to obtaining time-series predicted hot water supply heat load data based on typical actual hot water supply heat load data, the amount of heat measured by the terminal heat load measurement means 32 is used as time series actual terminal heat load data. Managing the power measured based on the measured value of the power load measuring means 11 and the output value of the inverter 6 as time-series actual power load data, and managing the time-series Obtain time-series predicted terminal thermal load data based on actual terminal thermal load data, and obtain time-series predicted power load data based on managed time-series actual power load data In It has been made.

The operation control means 5 has the time-series actual hot water supply thermal load data, the time-series actual terminal thermal load data, and the time-series actual power load data over a set period of a plurality of operation cycles. The unit is configured to be divided and managed for each unit time for each operation cycle composed of a plurality of unit times. The time-series actual hot water supply thermal load data, the time-series actual terminal thermal load data, and the time-series actual power load data are managed by storing them in the memory 31.
Incidentally, in this embodiment, the operation cycle is set to 1 day, the set period is set to 28 days (4 weeks), and the unit time is set to 1 hour.

Hereinafter, processing for obtaining actual load data for each unit time in the time-series actual hot water supply thermal load data, the time-series actual terminal thermal load data, and the time-series actual power load data will be described.
The actual load data for each unit time in the time-series actual hot water supply thermal load data and the time-series actual terminal thermal load data are obtained by integrating the actual load data for each sampling time. The actual load data per unit time in the time-series actual power load data is obtained by dividing the integrated value obtained by integrating the actual load data for each sampling time by the unit time.

  For the actual hot water supply heat load data per unit time in the time-series actual hot water supply heat load data, the operation control unit 5 determines that the target hot water temperature set by the target hot water supply temperature setting means C is the hot water tank 2. In the generation time zone of the high temperature thermal load data corresponding to a state higher than the set hot water temperature that can be discharged from the hot water, the amount of heat Qs measured by the hot water supply thermal load measuring means N for each sampling time is used to calculate the auxiliary heater 28. The amount of heat obtained by subtracting the minimum combustion amount Imin is used as the actual hot water supply heat load data for each sampling time, and in a time zone other than the generation time zone of the high temperature heat load data, the hot water supply heat load measuring means N is used for each sampling time. By integrating the measured amount of heat Qs as the actual hot water supply thermal load data for each sampling time and integrating the actual hot water heat load data for each sampling time, It is configured to determine the actual hot-water supply heat load data.

That is, the target hot water supply temperature for dishwashing is, for example, 60 ° C., which is higher than the preset hot water temperature 59 ° C., so that the operation of the dishwasher W is instructed by the operation switch 38 of the dishwasher W. In the state where the washing operation control unit 37 is instructed to set the target hot water supply temperature to the target hot water supply temperature for washing dishes, the hot water supply flow rate sensor 42 detects a flow rate equal to or higher than the set minimum flow rate. The time zone is the generation time zone of the high temperature heat load data.
In addition, a time zone in which the hot water supply flow rate sensor 42 detects a flow rate higher than the set minimum flow rate in a state where the hot water supply temperature setting unit 36 sets a target hot water supply temperature higher than the set hot water supply temperature, This is the time of generation of high-temperature heat load data.

The operation control unit 5 obtains the amount of heat Qs based on the above equation 1 in the generation time zone of the high temperature heat load data in a state where the target hot water supply temperature is set to the target hot water supply temperature for washing dishes. Is configured such that the hot water supply temperature Ts is the target hot water supply temperature for dishwashing, and the hot water supply flow rate Fs is a preset flow rate for dishwashing preset for hot water supply to the dishwasher W. Yes. Incidentally, the set flow rate for washing dishes is set to 24 liters / minute, for example.
Further, the operation control unit 5 performs the above-described equation 1 in the generation time zone of the high temperature thermal load data in a state where the target hot water supply temperature higher than the set hot water temperature is set by the hot water supply temperature setting unit 36. When determining the heat quantity Qs based on the hot water supply temperature Ts, the hot water supply temperature Ts is set to the target hot water supply temperature set by the hot water supply temperature setting unit 36, and the hot water supply flow rate Fs is set to the detected flow rate of the hot water supply flow rate sensor 42. Has been.

  The operation control unit 5 determines the hot water supply temperature Ts of the hot water supply temperature sensor 41 when obtaining the heat quantity Qs based on the above-described equation 1 in a time zone other than the generation time zone of the high temperature thermal load data. The detection temperature is set, and the hot water supply flow rate Fs is set as the detection flow rate of the hot water supply flow rate sensor 42.

That is, as described above, the operation controller 5 performs the minimum combustion of the auxiliary heater 28 from the heat quantity Qs measured by the hot water supply thermal load measuring means N at each sampling time in the generation time zone of the high temperature thermal load data. The amount of heat obtained by subtracting the amount Imin is used as actual hot water supply thermal load data for each sampling time, and the actual hot water supply thermal load data for each sampling time is integrated to obtain actual hot water supply thermal load data for each unit time. Thus, when the operation control unit 5 has high-temperature heat load data corresponding to a state in which the target hot water supply temperature is higher than a set hot water temperature at which hot water can be discharged from the hot water storage tank 2 in the prediction data calculation process, The time-series actual heat load data obtained by correcting the time-series actual heat load data in the generation time zone of the high-temperature heat load data to the load decreasing side is converted to the time-series actual heat load data. As heat load data, it will be configured to determine the time-series prediction heat load data.
Further, the operation control unit 5 generates the high-temperature heat load data by subtracting the auxiliary heating amount that is the heating amount of the auxiliary heater 28 in the generation time zone of the high-temperature heat load data in the prediction data calculation process. The time-series actual heat load data in the time zone is corrected to the load decreasing side.
Further, in the prediction data calculation process, the operation control unit 5 sets the minimum heating amount in the heating amount adjustment range of the auxiliary heater 28 as the auxiliary heating amount in a time series in the generation time zone of the high temperature thermal load data. The actual heat load data is corrected to the load decreasing side.

For the actual terminal thermal load data per unit time in the time-series actual terminal thermal load data, the operation control unit 5 determines the amount of heat measured by the terminal thermal load measuring means 32 for each sampling time as the sampling time. The actual terminal thermal load data for each unit time is obtained by integrating the actual terminal thermal load data for each sampling time as the actual terminal thermal load data for each time.
The operation control unit 5 measures the actual power load data per unit time in the time-series actual power load data based on the measured value of the power load measuring means 11 and the output value of the inverter 6. The actual power load data for each sampling time is integrated as the actual power load data for each sampling time, and the actual power load data for each unit time is obtained by dividing the integrated value by the unit time. It is configured.

  Then, the operation control means 5 newly sets the time series actual hot water supply thermal load data, the time series actual terminal thermal load data, and the time series actual power load data for one new operation cycle. Each time the sequential actual load data is obtained, the time-series actual load data of the past operation cycle is deleted, and the newly obtained time-series actual load data is stored in the memory 31. The time-series actual hot water supply thermal load data, the time-series actual terminal thermal load data, and the time-series actual power load data are managed over a period of time.

Hereinafter, processing for obtaining the time-series predicted hot water supply thermal load data, the time-series predicted terminal thermal load data, and the time-series predicted power load data will be described.
The operation control unit 5 includes the time-series actual hot water supply thermal load data, the time-series actual terminal thermal load data, and the time-series actual power load at the start point of the operation cycle (for example, 3 am). Based on the management data of the data, time-series predicted hot water supply thermal load data, time-series predicted terminal thermal load data, and time-series prediction of the first operation cycle among the operation cycles of consecutive prediction set times The power load data and the time-series predicted hot water supply thermal load data and the time-series predicted terminal thermal load data of the operation cycle subsequent to the first operation cycle among the operation cycles of the set number of times for prediction are configured. Has been. Incidentally, the set number of times for prediction is set to a plurality of times (for example, three times).

  Since the method for obtaining the time-series predicted hot water supply heat load data, the time-series predicted terminal thermal load data, and the time-series predicted power load data are the same, the method for obtaining them will be referred to as time series below. Real time hot water supply heat load data, the time series actual terminal heat load data and the time series actual power load data are collectively referred to as time series actual load data, and the time series predicted hot water supply heat load data The time-series predicted terminal thermal load data and the time-series predicted power load data will be collectively referred to as time-series predicted load data.

  The operation control unit 5 includes time-series actual load data Db on the same day as the prediction target day in the latest week (that is, the previous week) among the time-series actual load data for the set period being managed. Based on the average value Da of time-series actual load data for the remaining weeks excluding the most recent week (in this embodiment, 2 weeks ago, 3 weeks ago, 4 weeks ago), The time series predicted load data Dp is obtained by the following equation 4.

Dp = Da × γ + Db × (1−γ) (Equation 4)
However, γ is a constant and is set to 0.75, for example.

Next, the learning operation control process will be described.
In the learning operation control process, the operation control unit 5 adds the time-series predicted terminal heat load data and the time-series predicted power load data to the time-series predicted hot water supply heat load data. The heating unit H is configured to be heated and operated under the heating operation condition obtained so that the operation merit is increased.
Hereinafter, the time-series heat load data obtained by adding the time-series predicted hot water supply heat load data and the time-series predicted terminal heat load data will be referred to as time-series predicted heat load data and will be described. However, in this embodiment, as the heat load state, the terminal heat load at the heat consuming terminal 3 is not generated, and only the hot water supply heat load is generated. Assuming that only predicted hot water supply heat load data is obtained.

For example, at the start of the operation cycle, as shown in FIG. 3 and FIG. 4, the predicted power load data and the predicted heat load data of the first operation cycle among the operation cycles of the set number of predictions are obtained every unit time, As shown in FIG. 5, the predicted thermal load data of the operation cycle (shown for the second operation cycle in FIG. 5) following the first operation cycle among the operation cycles of the set number of times for prediction is obtained every unit time. . Note that FIG. 3 shows a unit time (hereinafter referred to as heat shortage) when the fuel cell 1 is operated in the load follow-up continuous operation mode to be described later. FIG. 4 is a diagram showing a load generation state in which a predicted power load and a predicted heat load in an operation cycle are generated in a load following continuous operation mode. It is a figure which shows the load generation | occurrence | production state which the unit time (Hereinafter, it may describe as a heat excess unit time.) Which a heat excess state generate | occur | produces when the battery 1 is drive | operated occurs.
Incidentally, the unit of predicted power load data is kWh, and the unit of predicted hot water supply thermal load data is kcal / h.

  The operation control unit 5 uses the start point of the operation cycle as the operation mode determination timing, and continuously operates the fuel cell 1 based on the time-series predicted power load and the time-series predicted heat load at the operation mode determination timing. The continuous operation merit when assuming that the fuel cell 1 is assumed to be operated and the intermittent operation merit when the fuel cell 1 is assumed to be intermittently operated are obtained. The operation mode of the battery 1 is determined as either a continuous operation mode or an intermittent operation mode, and the fuel cell 1 is operated in the determined operation mode.

In the first embodiment, as the operation merit, a predicted energy reduction amount that is predicted to be obtained by operating the fuel cell 1 is obtained.
Further, when the operation mode selection condition is that the predicted energy reduction amount of the continuous operation mode as the merit of continuous operation is equal to or greater than the set reduction amount G (for example, 580 Wh), the operation mode of the fuel cell 1 has priority over the intermittent operation mode. When the continuous operation mode is determined and the predicted energy reduction amount of the continuous operation mode is smaller than the set reduction amount G, the operation mode of the fuel cell 1 is changed to the predicted energy reduction amount of the continuous operation mode and the predicted energy of the intermittent operation mode. It is set to the conditions defined in the operation mode corresponding to the larger energy reduction amount among the reduction amounts.

The continuous operation mode includes a plurality of types of operation modes in which the power output mode of the fuel cell 1 with respect to the predicted power load is different, and the intermittent operation mode includes the power output mode of the fuel cell 1 with respect to the predicted power load or A plurality of types of operation modes that include different operation time zones for operating the fuel cell 1 are included.
And the said operation control part 5 calculates | requires the driving merit about each of the said multiple types of continuous operation form as the said continuous driving merit, and calculates | requires the driving merit about each of the said several types of intermittent operation form as the said intermittent operation merit. Then, based on the obtained operation merit for each of the plurality of types of continuous operation modes, the operation merit for each of the plurality of types of intermittent operation modes, and the operation mode selection condition, the operation mode of the fuel cell 1 is changed to the plurality of types. It is comprised so that it may determine in any one of the continuous operation form of this, and the said multiple types of intermittent operation form.

  Among the plurality of types of operation modes as the continuous operation mode, a load following continuous operation mode for causing the power generation output of the fuel cell 1 to follow the predicted power load in the entire time period of the operation cycle, among the plurality of unit times of the operation cycle Suppressing continuous operation in which the power generation output of the fuel cell 1 is set to a setting suppression output smaller than the predicted power load in a part of the unit time and the power generation output of the fuel cell 1 follows the predicted power load in the remaining unit time The power generation output of the fuel cell 1 is set to a set increase output larger than the predicted power load in a part of the unit time and the unit time of the operation cycle, and the fuel cell 1 in the remaining unit time. This is a forced continuous operation mode in which the generated power output is made to follow the predicted power load.

  Furthermore, when the fuel cell 1 is operated in the load follow-up continuous operation mode, the hot water storage tank in the unit time of the operation cycle when the suppression continuous operation mode is the set suppression output. Unit time before the unit time in which the heat surplus state occurs when there is a unit time in which a heat surplus state in which the predicted hot water storage amount of 2 is greater than or equal to the tank full hot water storage amount (corresponding to the set upper limit amount) Among these, the load follow-up continuous operation is defined as a unit time in which the occurrence of the excess heat state is suppressed and the operation merit is the highest, and the forced continuous operation mode is the set increase output. When operating the fuel cell 1 in the form, there is a unit time during which a shortage of heat occurs in which the predicted amount of stored hot water in the hot water tank 1 is insufficient with respect to the predicted heat load among the plurality of unit times of the operation cycle. When, among the previous unit time than the unit time the thermal insufficiency occurs, those set forth in suppressing the generation of the heat starved and most operating merit increases the unit time

  The plurality of types of operation modes of the intermittent operation mode have the unit operation time following the predicted power load as the unit time for causing the power generation output of the fuel cell 1 to follow the operation time zone. Load follow-up intermittent operation mode that is set to a unit time in which the power becomes high, unit time for adjusting the power generation output of the fuel cell 1 to a setting suppression output smaller than the predicted power load, and a plurality of units of the operation cycle as the operation time zone The controlled intermittent operation mode that is set to the unit time in which the driving merit becomes the highest among the time, and the unit time for adjusting the power generation output of the fuel cell 1 to the set increase output that is larger than the predicted power load are set as the operation time zone. This is a forced intermittent operation mode determined at a unit time in which the driving merit is highest among a plurality of unit times of the operation cycle.

Further, as the load following intermittent operation mode, the operation merit based on the predicted power load and the predicted heat load in the operation cycle that defines the unit time for causing the power generation output of the fuel cell 1 to follow the predicted power load becomes the highest. A single-cycle-compatible load following intermittent operation mode defined in unit time, a unit time for causing the power generation output of the fuel cell 1 to follow the predicted power load, a predicted power load and a predicted heat load in the operation cycle for determining the unit time, and subsequent And a load following intermittent operation mode corresponding to a plurality of cycles defined in a unit time in which the operation merit based on the predicted thermal load in the operation cycle is the highest.
As the suppression intermittent operation mode, the unit time for adjusting the power generation output of the fuel cell 1 to the set suppression output is set to the unit time in which the operation merit based on the predicted power load and the predicted heat load in the operation cycle that determines the unit time becomes the highest. A single cycle corresponding suppression intermittent operation mode and a unit time for adjusting the power generation output of the fuel cell 1 to the set suppression output are determined in the predicted power load and the predicted heat load in the operation cycle and in the subsequent operation cycle. And a multi-cycle compatible intermittent intermittent operation mode defined in a unit time in which the operation merit based on the predicted heat load is the highest.
As the forced intermittent operation mode, the unit time for adjusting the power generation output of the fuel cell 1 to the set increased output is set to the unit time in which the operation merit based on the predicted power load and the predicted heat load in the operation cycle for determining the unit time becomes the highest. A single cycle corresponding type forced intermittent operation mode and a unit time for adjusting the power generation output of the fuel cell 1 to the set increase output are set in the predicted power load and predicted heat load in the operation cycle and in the subsequent operation cycle. And a forced cycle operation mode corresponding to a plurality of cycles defined in a unit time in which the operation merit based on the predicted heat load is the highest.

  In the first embodiment, since the operation cycle is set to one day, the single cycle correspondence type of each of the load following intermittent operation mode, the suppression intermittent operation mode, and the forced intermittent operation mode is described as a one-day correspondence type. In addition, the load following intermittent operation mode, the suppression intermittent operation mode, and the forced intermittent operation mode, each of which corresponds to a plurality of cycles, is a two-day response type in which the subsequent operation cycle is one time, and a subsequent operation cycle is two times. 3 day compatible type is included.

  Next, a description will be given of the operation merit calculation processing for obtaining the continuous operation merit and the intermittent operation merit.

As shown in FIG. 3 and FIG. 4, the operation control unit 5 assumes that the load follow continuous operation mode is performed in the operation cycle at the start of the operation cycle, and for each of a plurality of unit times of the operation cycle, The predicted power output of the fuel cell 1 following the predicted power load, the predicted heat output of the fuel cell 1, the amount of heat predicted to be stored by hot water in the hot water tank 2 (hereinafter sometimes referred to as predicted hot water storage amount), hot water storage Predicted insufficient heat quantity that the predicted hot water storage capacity of the tank 2 is insufficient with respect to the predicted hot water supply heat load; From the unit time to the unit time when the predicted insufficient heat quantity is greater than 0 (ie, the heat insufficient unit time) or the unit time when the predicted residual heat quantity is greater than 0 (ie, the excess heat unit time) Is configured to determine the heat radiation time is the time at.
Note that the predicted hot water storage amount, the predicted insufficient heat amount, and the predicted surplus heat amount indicate the heat amounts at the end of each unit time, respectively. In the first embodiment, the predicted heat load is generated at the start time of each unit time, and the predicted heat output is output after the predicted heat load is generated.

And when the said heat | fever surplus unit time exists, the driving | operation control part 5 is the predicted energy reduction amount of a load follow-up continuous driving | operation form, and the suppression continuous as a prediction energy reduction | decrease amount of the continuous driving | running mode as the said continuous operation merit. Obtaining the predicted energy reduction amount of the operation mode, and when the heat shortage unit time exists, as the predicted energy reduction amount of the continuous operation mode as the continuous operation merit, the predicted energy reduction amount of the load following continuous operation mode, and The amount of predicted energy reduction in the forced continuous operation mode is obtained.
In addition, the operation control unit 5 uses a one-day response type, a two-day response type for each of the load following intermittent operation mode, the suppression intermittent operation mode, and the forced intermittent operation mode as the predicted energy reduction amount of the intermittent operation mode as the merit of the intermittent operation. The amount of predicted energy reduction for each type of driving mode is calculated.

First, a description will be given of how to obtain the aforementioned predicted power generation output, predicted heat output, predicted hot water storage amount, predicted insufficient heat amount, and predicted surplus heat amount.
The predicted power generation output (kW) for each of the plurality of unit times of the operation cycle is predicted when the predicted power load is in the range of the minimum output (eg, 0.3 kW) or more and the maximum output (eg, 1.0 kW) of the fuel cell 1. When the predicted power load is smaller than the minimum output of the fuel cell 1, the minimum output is set. When the predicted power load is larger than the maximum output of the fuel cell 1, the maximum output is set. .
The predicted heat output (kcal / h) for each of a plurality of unit times of the operation cycle is obtained by the following formula 5.

  Predicted heat output = α × {(predicted power output ÷ battery power generation efficiency) × battery heat efficiency} + surplus power × α × β−base heat dissipation amount (Equation 5)

However, the surplus power is obtained by subtracting the predicted power load from the predicted power output when the predicted power output is larger than the predicted power load.
For example, when the predicted power load is smaller than the minimum output of the fuel cell 1, the surplus power is obtained by subtracting the predicted power load from the minimum output of the fuel cell 1. In addition, as will be described in detail later, when the power generation output of the fuel cell 1 is set to a setting increase output larger than the main output following the predicted power load, the surplus power subtracts the predicted power load from the set increase output. Is required.
α is a coefficient set to 860 as described above.
β is a heater efficiency that is an efficiency when the electric heater 12 converts surplus power (kWh) into heat (kWh), and is set to 0.9, for example.
The battery power generation efficiency indicates the ratio of the power generation output (kWh) to the unit energy consumption (kWh) in the fuel cell 1, and the battery thermal efficiency is the ratio of the generated heat amount (kWh) to the unit energy consumption (kWh) in the fuel cell 1. The battery power generation efficiency and the battery thermal efficiency vary according to the power generation output, and are set in advance according to the power generation output and stored in the memory 31 as shown in FIG. And the operation control part 5 is comprised so that the battery power generation efficiency and battery thermal efficiency according to the prediction power generation output may be calculated | required from the memory | storage information of the battery power generation efficiency and battery thermal efficiency.
In this cogeneration system, the base heat release amount is the amount of heat radiated without being used for hot water storage in the hot water storage tank 2 and heating by the heat consuming terminal 3 among the generated heat amount of the combined heat and power supply device 1, for example, 50 kcal / h And is stored in the memory 31.

The predicted amount of stored hot water (kcal / h), predicted insufficient heat (kcal / h), and predicted excess heat (kcal / h) for each unit time are obtained by the following equations 6, 7, and 8, respectively.
However, in each equation, the subscript “n” indicates the order of unit times in the operation cycle. For example, when n = 1, it indicates the first unit time in the operation cycle.
By the way, the predicted hot water storage amount _n-1 becomes ₀ when the predicted hot water storage amount is n = 1, and this predicted hot water storage heat amount ₀ is the predicted hot water storage amount at the start of the operation cycle (that is, the initial stage), and the upper end temperature sensor S1. Based on the detected temperatures of the intermediate upper temperature sensor S2, the intermediate lower temperature sensor S3, the lower end temperature sensor S4, and the feed water temperature sensor 43, the above equation 2 is used.

Predicted hot water storage amount _n = (Predicted hot water storage amount _n-1 −Predicted heat load _n + Predicted heat output _n ) × (1-tank heat dissipation rate) (Equation 6)
Predicted insufficient heat quantity = Predicted heat load _n -Predicted hot water storage quantity _n-1 (Equation 7)
Predicted excess heat amount = (Predicted hot water storage amount _n-1 −Predicted heat load _n + Predicted heat output _n ) × (1-tank heat dissipation rate) −tank full hot water storage amount ............ (Equation 8)

However, the maximum value of the predicted hot water storage amount _n is regulated to be equal to or less than the tank full hot water storage amount, which is the amount of heat stored in the hot water storage tank 2 when the hot water storage amount of the hot water storage tank 2 becomes full. It is obtained from the hot water storage temperature of the hot water storage tank 2, the temperature of the hot water supply to the hot water storage tank 2 and the capacity of the hot water storage tank 2. Incidentally, the hot water storage temperature is an average of the detected temperatures of the upper end temperature sensor S1, the intermediate upper temperature sensor S2, the intermediate lower temperature sensor S3, and the lower end temperature sensor S4 that are equal to or higher than the set temperature for heat radiation operation (for example, 45 ° C.). The feed water temperature is an average value of the feed water temperatures detected by the feed water temperature sensor 43.
The tank heat dissipation rate is the heat dissipation rate from the hot water storage tank 2, and is preset to 0.012, for example, and stored in the memory 31.
Further, when the predicted insufficient heat amount obtained by the equation 7 is a negative value, the predicted insufficient heat amount is set to 0, and when the predicted residual heat amount obtained by the equation 8 is a negative value, the predicted residual heat amount. Is set to 0.

  The predicted energy reduction amount in each operation mode is obtained by subtracting the energy consumption amount when the fuel cell 1 is operated in each operation mode from the energy consumption amount when the fuel cell 1 is not operated as shown in Equation 9 below. To calculate.

  Predicted energy reduction amount P = energy consumption amount E1 when the fuel cell 1 is not operated E1-energy consumption amount E2 when the fuel cell 1 is operated (Equation 9)

The energy consumption E1 (kWh) when the fuel cell 1 is not operated is the commercial power when the predicted power load of the first operation cycle is supplemented with the received power from the commercial power supply 7 as shown in the following formula 10. It is obtained as the sum of the energy consumption amount in the power source 7 and the energy consumption amount when all of the predicted heat load of the first operation cycle is supplemented with the heat generated by the auxiliary heater 28.
In other words, the energy consumption E1 in the case where the fuel cell 1 is not operated is obtained in the same manner regardless of the expected energy reduction amount in any operation mode.

E1 = predicted power load / commercial power generation efficiency + predicted heat load / auxiliary heater thermal efficiency (Equation 10)
However, the predicted heat load is a value converted into kWh.

  On the other hand, the energy consumption amount E2 (kWh) when the fuel cell 1 is operated is calculated by using the predicted power load and the predicted heat load of the first operation cycle as the predicted power generation output and the predicted value of the fuel cell 1, as shown in the following Expression 11. The operating cycle energy consumption, which is the energy consumed by the fuel cell 1 when supplemented with heat output, and the predicted shortage power corresponding to the predicted power load minus the predicted power output are all received power from the commercial power source 7. The amount of energy consumed in the commercial power source 7 when supplemented and the amount of energy consumed when all of the predicted insufficient heat amount is supplemented with the heat generated by the auxiliary heater 28 are obtained.

E2 = Operating cycle energy consumption + predicted insufficient power / commercial power generation efficiency + predicted insufficient heat / auxiliary heater thermal efficiency
However, the predicted insufficient heat quantity is a value converted into kWh.

However,
Commercial power generation efficiency: The ratio of the power generation output (kWh) to the unit energy consumption (kWh) in the commercial power supply 7, and is set to 0.366, for example.
Auxiliary heater thermal efficiency: the ratio of the generated heat quantity (kWh or kcal) to the unit energy consumption (kWh or kcal) in the auxiliary heater 28, for example, set to 0.7.

  The operation period energy consumption is obtained by calculating the energy consumption per unit time for operating the fuel cell 1 in each operation mode and integrating the obtained energy consumption per unit time using the following equation 12.

  Energy consumption = (power generation output ÷ battery power generation efficiency) ......... (Formula 12)

In determining the energy consumption amount E2 when the fuel cell 1 is operated, when starting the fuel cell 1 within the operation cycle, the start-up energy consumption consumed when starting the fuel cell 1 is added to the operation. When the fuel cell 1 is stopped within the cycle, energy consumption at the time of stop consumed when the fuel cell 1 is stopped is added.
Incidentally, the startup energy consumption includes energy required to warm up the reformer, the transformer, and the like that constitute the fuel gas generation unit to a temperature set so that each of them can be processed. In addition, the energy consumption at the time of stop is the energy required when purging purge gas (raw fuel gas or inert gas) into the gas flow path of the fuel gas generator when the fuel cell 1 is stopped, specifically, It includes energy for driving fans, pumps, valves and the like. The starting energy consumption and stopping energy consumption of the fuel cell 1 are unique to the fuel cell 1. The start-up energy consumption and stop-time energy consumption are obtained in advance by experiments or the like and stored in the memory 31. For example, the starting energy consumption is set to 1900 Wh, and the stopping energy consumption is set to 200 Wh.

First, how to obtain the predicted energy reduction amount for each of the multiple types of continuous operation modes will be described.
The predicted energy reduction amount in the load following continuous operation mode is obtained as follows.
The energy consumption amount of each unit time is obtained as the main output by the above equation 12, and the operation period energy consumption amount is obtained by integrating the obtained energy consumption amounts of each unit time. Based on the above, an energy consumption amount E2 when the fuel cell 1 is operated is obtained by Expression 11.
Based on the energy consumption amount E2 when the fuel cell 1 thus obtained is operated and the energy consumption amount E1 when the fuel cell 1 is not operated obtained by Equation 10, the predicted energy reduction amount is obtained by Equation 9. Find P.

The predicted energy reduction amount in the forced continuous operation mode is obtained as follows.
First, for each unit time prior to the heat shortage unit time (when there are multiple heat shortage unit times, the one closest to the start point of the operation cycle), the predicted power load is greater than the predicted power load. Set a large set increase output.
Then, the unit time in which the power generation output of the fuel cell 1 is the set increase output is set to the unit time in which the predicted energy reduction amount is the largest among the unit times before the heat shortage unit time in the operation cycle. Is calculated as the predicted energy reduction amount in the forced continuous operation mode.

A description will be given of how to obtain the predicted energy reduction amount in this forced continuous operation mode.
First, a description will be given of how to set the setting increase output.
The increased output setting condition is that an increased merit evaluation index for evaluating the merit of making the power generation output of the fuel cell 1 larger than the main output is a set increased output for the power required as a value that can obtain the merit. It is a condition to set.
Specifically, as shown in FIG. 3, for each unit time before the heat shortage unit time (17th unit time), a temporarily set increased output larger than the main output is gradually increased (for example, An increase merit evaluation index is obtained by the following equation 13 for each temporarily set increase output. Then, for each unit time prior to the heat shortage unit time, the one with the largest power among the temporarily set increase outputs obtained as the value for obtaining the merit for the increase merit evaluation index is set as the set increase output.

  Index for merit evaluation at the time of increase = {(Effective amount of hot water stored during increased output-Effective amount of stored hot water during main output) ÷ Auxiliary heater thermal efficiency-(Energy consumption during increased output-Energy consumption during main output)} ÷ (Increase Effective amount of stored hot water during output-Effective amount of stored hot water during main output) ………… (Formula 13)

The effective amount of stored hot water at the time of increased output is the amount of heat obtained by subtracting the amount of heat released from the hot water storage tank 2 from the amount of heat obtained by making the power generation output of the fuel cell 1 larger than the main output in unit time until the unit time of insufficient heat. Then, the following formula 14 is used to obtain a temporarily set increased output as a power generation output.
Further, the effective hot water storage amount at the time of main output is the amount of heat obtained by adjusting the power generation output of the fuel cell 1 to the main output per unit time to the amount of heat released from the hot water storage tank 2 until the heat shortage unit time. In the following equation 14, the main output is substituted for the power generation output.

Effective amount of stored hot water = [α × {(power generation output ÷ battery power generation efficiency) × battery heat efficiency} + surplus power × α × β−base heat dissipation amount) × (1−tank heat dissipation rate) ^t (Equation 14)
Where t is the heat dissipation time.

  The energy consumption amount at the time of increased output is the energy consumption amount of the fuel cell 1 when the power generation output of the fuel cell 1 is adjusted to the temporarily set increased output, and the temporarily set increased output is substituted as the power generation output in the equation 12. The energy consumption amount at the time of main output is the energy consumption amount of the fuel cell 1 when the power generation output of the fuel cell 1 is adjusted to the main output. A value obtained by substituting the main output as the power generation output is converted into kcal.

In the numerator of Expression 13, “(Effective hot water storage amount at increased output−Effective hot water storage amount at main output) ÷ Auxiliary heater thermal efficiency” increases by making the power generation output of the fuel cell 1 larger than the main output. If the effective amount of stored hot water is obtained by the amount of heat generated by the auxiliary heater 28, this indicates the amount of energy required, and the amount of energy that is a merit.
Further, in the numerator of the equation 13, “(energy consumption at the time of increased output−energy consumption at the time of main output)” is increased by making the power generation output of the fuel cell 1 larger than the main output. It shows the amount of energy consumed, and shows the amount of energy that is a demerit.
That is, “(Effective hot water storage amount during increased output−Effective hot water storage amount during main output) ÷ Auxiliary heater thermal efficiency− (Energy consumption during increased output−Energy consumption during main output)” in the numerator of Equation 13 is When obtained as a positive value, it means that the merit can be obtained by making the power generation output of the fuel cell 1 larger than the main output, and the greater the value, the greater the merit.

The “effective heat storage heat amount at the time of increased output−effective heat storage heat amount at the time of main output” in the denominator of the equation 13 indicates the effective heat storage heat amount that is increased by making the power generation output of the fuel cell 1 larger than the main power output. Is obtained as a positive value.
That is, when the increase merit evaluation index obtained by the equation 13 is a positive value, it means that the merit can be obtained by making the power generation output of the fuel cell 1 larger than the main power output. The larger the value, the greater the merit.

In FIG. 3, since the 17th unit time is the heat shortage unit time closest to the start point of the operation cycle, the setting increase output is set for each unit time before the 17th unit time.
For example, for the first unit time, since the main output is 0.3 kW, the temporarily set increased output is 0.4 kW, 0.5 kW, 0.6 kW, 0.7 kW, 0.8 kW, 0.9 kW. , 1.0 kW, and an increase merit evaluation index for each temporarily set increase output.
For the temporary increase output of 0.4 kW, 0.5 kW, 0.6 kW, 0.7 kW, and 0.8 kW, the increase merit evaluation index is obtained as a positive value, and the temporary increase increase output is 0.9 kW, For 1.0 kW, the merit evaluation index at the time of increase is obtained as a negative value. Therefore, as the setting increase output, the merit evaluation index at the time of increase is a positive value and the power is the maximum among the temporarily set increase outputs. Temporary setting increase output, that is, 0.8 kW is set.

  By the way, for the sixth unit time, 0.9 kW and 1.0 kW are set as the temporary set increase output, but the increase merit evaluation index is obtained as a negative value for any temporarily set increase output. The setting increase output is not set.

Next, all the tentative operation patterns for forced operation that use the time zone consisting of one or a plurality of continuous unit times before the heat shortage unit time as the forced operation time zone for adjusting the power generation output to the set increased output Form.
That is, among the plurality of unit times before the heat shortage unit time among the plurality of unit times in the operation cycle, the selected one or a plurality of continuous unit times are set as the forced operation time zone and the operation cycle By changing the unit time to be selected as the forced operation time zone in the form of the main operation time zone for adjusting the power generation output to the main output as the remaining unit time, the temporary operation pattern for forced operation is changed. Form all. Incidentally, the temporary operation pattern formed only in the unit time in which the forced operation time zone is not set to the increased setting output is excluded from the temporary operation pattern for forced operation.

  For example, as shown in FIG. 3, when the 17th unit time (unit time 17) is a heat shortage unit time, as shown in FIG. Pattern 1 with time 1 for forced operation, Pattern 2 with unit time 1, 2 for forced operation, Pattern 3 with unit time 1, 2, 3 for forced operation There are 16 types of patterns 16 in which the unit time 1 to 16 is a time zone for forced operation. Further, as a pattern from the unit time 2 to the forced operation time zone, a pattern 17 having the unit time 2 as the forced operation time zone, a pattern 18 having the unit times 2 and 3 as the forced operation time zone, 18 units. There are fifteen types of patterns 31 in which time 2 to 16 is a time zone for forced operation. As described above, among the 136 types of patterns up to the pattern 136 in which the unit time 16 immediately before the heat shortage unit time 17 is the forced operation time zone, the unit time in which the forced operation time zone is not set to the set increase output. A pattern formed only by the above, for example, a pattern excluding the pattern 82 in which only the unit time 7 is the time zone for forced operation, etc., is defined as a temporary operation pattern for forced operation.

For each of the forced operation patterns for forced operation, the predicted energy reduction amount P is obtained based on the above equations 9 to 11, and the power generation output is increased in the unit time of the forced operation time zone of the operation cycle. Assuming that the fuel cell 1 is operated in a state where the output is adjusted and the power generation output is adjusted to the main output in the unit time of the main operation time zone, the predicted heat output, the predicted hot water storage amount, the prediction for each unit time Find the amount of heat shortage and surplus heat.
It should be noted that the energy consumption per unit time in the forced operation time zone is obtained as a set increase output by the above formula 12, and the power consumption output per unit time in the main operation time zone is calculated by the above formula 12. When the operating cycle energy consumption is obtained by accumulating the obtained energy consumption for each unit time as the main output, and the fuel cell 1 is operated according to Equation 11 based on the operating cycle energy consumption The energy consumption amount E2 is obtained.

  Subsequently, a temporary operation pattern for forced operation that has the highest predicted energy reduction amount and does not generate excess heat unit time among all the temporary operation patterns for forced operation is obtained. When time does not occur, the temporary operation pattern for forced operation is set as the operation pattern of the forced continuous operation mode, and the predicted energy reduction amount of the temporary operation pattern for forced operation is set as the predicted energy reduction amount of the forced continuous operation mode. Ask.

In addition, in the temporary operation pattern for forced operation in which the excess heat unit time does not occur and the predicted energy reduction amount is the highest, when the heat shortage unit time still occurs, as described above, the previous time before the heat shortage unit time. While setting the set increase output for each unit time, and determining the temporary operation pattern for forced operation with the highest predicted energy reduction amount without generating excess heat unit time, set the operation pattern of forced continuous operation mode The process of obtaining the predicted energy reduction amount in the forced continuous operation mode is repeated until the heat shortage unit time does not occur.
However, for the unit time for which forced operation has already been set to adjust the power generation output to the set increase output, set the unit time other than the unit time for which forced operation has been set with the predicted power generation output set to the set increase output. The increased output is set and the above process is executed. That is, the temporary operation pattern formed only by the unit time for which the forced operation unit time has been set for forced operation is excluded from the temporary operation pattern for forced operation.

The predicted energy reduction amount in the suppressed continuous operation mode is obtained as follows.
First, for each unit time before the heat surplus unit time (when there are multiple heat surplus unit times, the one closest to the start point of the operation cycle), based on the suppression output setting condition, Set a small setting suppression output.
The unit time for setting the power generation output of the fuel cell 1 as the setting suppression output is set to the unit time in which the predicted energy reduction amount is the largest among the unit times before the heat surplus unit time in the operation cycle. The predicted energy reduction amount at the time is obtained as the predicted energy reduction amount in the suppressed continuous operation mode.

A description will be given of how to obtain the predicted energy reduction amount in this suppressed continuous operation mode.
First, how to set the setting suppression output will be described.
The suppression output setting condition is that the suppression output is set to the electric power required as the value for which the merit evaluation index for suppression for evaluating the merit by making the power generation output of the fuel cell 1 smaller than the main output is the merit value. It is a condition to set.
Specifically, as shown in FIG. 4, for each unit time before the heat surplus unit time (the 17th unit time), a temporary setting suppression output smaller than the main output is stepwise (for example, 0.1 kW interval), and for each temporary setting suppression output, an index for merit evaluation during suppression is obtained by the following formula 15. Then, for each unit time prior to the heat surplus unit time, the temporary setting suppression output that is obtained as a value for which the merit evaluation index during suppression is obtained as a merit is set to the setting suppression output.

  Indicator for merit evaluation during suppression = {(energy consumption during main output-energy consumption during suppression output)-α x (shortage power during suppression output-shortage power during main output) ÷ commercial power generation efficiency} ÷ (Effective amount of stored hot water at the time of restraint output-Effective amount of stored hot water at the time of main output) ......... (Formula 15)

  The energy consumption at the time of main output is obtained in the same manner as the case of obtaining the predicted energy reduction amount in the forced continuous operation mode described above, and the energy consumption at the time of restraint output is adjusted to the power generation output of the fuel cell 1 to the temporarily set restraint output. The energy consumption amount of the fuel cell 1 at the time, and the value obtained by substituting the temporarily set suppression output as the power generation output in the equation 12 is converted into kcal.

  The power shortage at the time of main output is the amount of power that is insufficient with respect to the predicted power load when the power generation output of the fuel cell 1 is adjusted to the main output. Substituting and calculating, the insufficient power amount at the time of the suppression output is the amount of power that is insufficient with respect to the predicted power load when the power generation output of the fuel cell 1 is adjusted to the temporarily set suppression output. This is obtained by substituting the temporarily set suppression output as the power generation output. However, the power shortage at the time of main output and the power shortage at the time of suppressed output are both 0 when determined as a value smaller than 0.

  Insufficient power amount = predicted power load-power generation output ...

  The effective hot water storage amount at the time of main power output is obtained in the same manner as the case of obtaining the predicted energy reduction amount in the above-described forced continuous operation mode, and the effective hot water storage amount at the time of suppression output is obtained by calculating the power generation output of the fuel cell 1 from the main output in unit time. Is the amount of heat obtained by subtracting the amount of heat dissipated from the hot water tank 2 from the amount of heat obtained by reducing the heat amount to the unit time of excess heat.

In the numerator of Equation 15, “(energy consumption at power output−energy consumption at suppression output)” is energy in the fuel cell 1 that is reduced by making the power generation output of the fuel cell 1 smaller than the power output. It indicates the amount of consumption, and the amount of energy that is a merit.
Further, by making the power generation output of the fuel cell 1 smaller than the main power output, the amount of power shortage that the power generation output of the fuel cell 1 is insufficient with respect to the predicted power load increases. "(Insufficient power at the time of suppression output-Insufficient power at the time of main output) x α ÷ Commercial power generation efficiency" Is obtained by the commercial power supply 7, and indicates the amount of energy required, which indicates a demerit.
That is, “(energy consumption at main output−energy consumption at suppression output) − (insufficient power at suppression output−insufficient energy at main output) × α ÷ commercial power generation efficiency” When obtained as a positive value, it means that a merit can be obtained by making the power generation output of the fuel cell 1 smaller than the main output, and the greater the value, the greater the merit.

“Effective hot water storage amount during suppression output−effective hot water storage amount during main output” in the denominator of Equation 15 indicates an effective hot storage heat amount that is reduced by making the power generation output of the fuel cell 1 smaller than the main output. Is obtained as a negative value.
In other words, when the suppression merit evaluation index obtained by Equation 15 is a negative value, it means that the merit can be obtained by making the power generation output of the fuel cell 1 smaller than the main output, and its absolute The larger the value, the greater the merit.

In FIG. 4, since the 17th unit time is the heat remainder unit time closest to the start point of the operation cycle, the setting suppression output is set for each unit time before the 17th unit time.
For example, for the third unit time, since the main output is 0.6 kW, 0.5 kW, 0.4 kW, and 0.3 kW are set as temporary setting suppression outputs, and each temporary setting suppression output is suppressed. Find the time merit evaluation index.
Since the temporary merit evaluation output is calculated as a negative value for all of 0.5 kW, 0.4 kW, and 0.3 kW, the setting suppression output is the temporary setting suppression output among the temporary setting suppression outputs. A temporary suppression output having a negative merit evaluation index and a minimum power, that is, 0.3 kW is set.

  Incidentally, for the second unit time, 0.4 kW and 0.3 kW are set as temporary setting suppression outputs, but the suppression merit evaluation index is obtained as a positive value for any temporary setting suppression output. Setting suppression output is not set.

Next, all the temporary operation patterns for the suppression operation are set to the suppression operation time zone in which the power generation output is adjusted to the set suppression output in the time zone composed of one or a plurality of continuous unit times before the heat surplus unit time. Form.
That is, among the plurality of unit times before the heat surplus unit time in the plurality of unit times in the operation cycle, the selected one or a plurality of continuous unit times are set as the suppression operation time zone and the operation cycle By setting the remaining unit time as the main operation time zone for adjusting the power generation output to the main output, the temporary operation pattern for the suppression operation can be changed by changing the unit time selected as the suppression operation time zone. Form all. Incidentally, the temporary operation pattern formed only by the unit time for which the set suppression output is not set in the suppression operation time zone is excluded from the temporary operation pattern for the suppression operation.

  For example, as shown in FIG. 4, when the 17th unit time (unit time 17) is a surplus heat unit time, as shown in FIG. 7, the provisional operation pattern for forced operation is formed as described above. Of the 136 types of patterns, the suppression operation time zone is a pattern formed only by unit time for which the set suppression output is not set, for example, unit times 10, 11, 12, 13, 14, and 15 are suppressed operation time. A pattern excluding the pattern 121 and the like to be a band is set as a temporary operation pattern for restraining operation.

Then, for each of the temporary operation patterns for the suppression operation, the predicted energy reduction amount P is obtained based on the equations 9 to 11, and further, the power generation output is set and suppressed in the unit time of the suppression operation time zone of the operation cycle. Assuming that the fuel cell 1 is operated in a state where the output is adjusted and the power generation output is adjusted to the main output in the unit time of the main operation time zone, the predicted heat output, the predicted hot water storage amount, the prediction for each unit time Find the amount of heat shortage and surplus heat.
The energy consumption per unit time in the suppression operation time zone is obtained as a set suppression output by the above formula 12, and the energy consumption per unit time in the main operation time zone is calculated by using the above formula 12. When the operating cycle energy consumption is obtained by accumulating the obtained energy consumption for each unit time as the main output, and the fuel cell 1 is operated according to Equation 11 based on the operating cycle energy consumption The energy consumption amount E2 is obtained.

  Subsequently, a temporary operation pattern for suppression operation that does not generate heat shortage unit time and has the highest predicted energy reduction amount among all temporary operation patterns for suppression operation is obtained, and a unit of heat surplus is obtained in the calculated temporary operation pattern. If time does not occur, the temporary operation pattern for the suppression operation is set as the operation pattern of the suppression continuous operation mode, and the predicted energy reduction amount of the temporary operation pattern for the suppression operation is set as the predicted energy reduction amount of the suppression continuous operation mode. Ask.

In addition, in the temporary operation pattern for restraint operation in which the heat shortage unit time does not occur and the predicted energy reduction amount is the highest, when the heat surplus unit time still occurs, as described above, the heat surplus unit time is earlier than the heat surplus unit time. While setting the setting suppression output for each unit time, and determining the temporary operation pattern for the suppression operation that does not produce heat shortage unit time and has the highest predicted energy reduction amount, the operation pattern of the suppression continuous operation mode is set The process of obtaining the predicted energy reduction amount in the suppressed continuous operation mode is repeated until the unit time of excess heat does not occur.
However, for the unit time that has already been set to suppress operation that is set to adjust the power generation output to the set suppression output, set the unit time other than the unit time that has been set for the suppression operation in the state where the predicted power generation output is set to the set suppression output. The suppression output is set and the above-described processing is executed. That is, the temporary operation pattern formed only by the unit time for which the suppression operation unit time has been set for the suppression operation is excluded from the temporary operation pattern for the suppression operation.

Next, how to obtain the predicted energy reduction amount for each of the multiple types of intermittent operation modes will be described.
As shown in FIG. 8, all of the temporary operation patterns for intermittent operation for setting one operation time zone composed of one or a plurality of continuous unit times are stored in the memory 31.
That is, among the plurality of unit times of the operation cycle, the selected one or a plurality of continuous unit times are set as unit times constituting the operation time zone, and the remaining unit time of the operation cycle is stopped. By changing the unit time selected as the unit time constituting the operation time zone in the form of the unit time constituting the stop time zone, all the temporary operation patterns for intermittent operation are formed.

  For example, as a pattern for starting operation from unit time 1, pattern 1 with unit time 1 as the operation time zone, pattern 2 with unit time 1, 2 as the operation time zone, and unit times 1, 2, and 3 as the operation time There are 24 types of patterns 24 in which the unit time 1 to 24 is an operation time zone. Further, as a pattern for starting operation from unit time 2, pattern 25 using unit time 2 as an operation time zone, pattern 26 using unit times 2 and 3 as an operation time zone, and so on. There are 23 types of patterns 47. As described above, there are 300 types of temporary operation patterns for the intermittent operation from the pattern 1 to the pattern 300 up to the pattern 300 in which the last unit time 24 of the operation cycle is the operation time zone.

Also, for each of a plurality of unit times of the operation cycle, a setting increase output larger than the predicted power load is set based on the increase output setting condition, and a setting suppression output smaller than the prediction power load is set based on the suppression output setting condition To do.
The increased output setting condition includes a plurality of temporarily set outputs that are larger than the main output, and the amount of heat generated when the output is increased when the power generation output of the fuel cell 1 is adjusted to the temporarily set output. Based on this, the provisional output is set as the preset increase output with the maximum amount of heat generated when the output is increased.
The suppression output setting condition includes a plurality of temporary setting outputs smaller than the main output, and a difference in energy consumption between when the temporary setting output is obtained by the fuel cell 1 and when the commercial power supply 7 is obtained. This is a condition for setting the temporarily set output with the smallest power generation energy amount difference during output suppression as the setting suppression output based on the power generation energy amount difference during output suppression.

A method for setting the setting increase output and the setting suppression output will be described.
As shown in FIG. 9, the temporarily set output for increasing output setting or suppressing output setting is set stepwise (for example, at an interval of 0.05 kW), and for each temporarily set output, the amount of heat generated at the time of output increase (kW) Is obtained by the following equation 17, the energy difference for power generation at the time of output suppression (kW) is obtained by the following equation 18, and the generated heat amount at the time of output increase and the energy amount difference at the time of output suppression at the time of power generation are temporarily set. It is stored in the memory 31 in association with the output.

Amount of heat generated when output increases = (temporary set output ÷ battery power generation efficiency) x battery thermal efficiency ... (Equation 17)
Difference in energy amount for power generation when output is suppressed = Temporary setting output ÷ Battery power generation efficiency-Temporary setting output ÷ Commercial power source power generation efficiency (Equation 18)

  Incidentally, since the commercial power generation efficiency is larger than the battery power generation efficiency, the smaller the difference in energy amount for power generation during output suppression, the lower the power generation output of the fuel cell 1 than the main power output. Is advantageous.

And about each unit time of an operation cycle, the operation control part 5 sets a thing with the largest generated heat amount at the time of an output increase among temporary setting outputs larger than an electric main output as a setting increase output, and it is more than an electric main output. Among the small temporarily set outputs, the one having the smallest difference in power generation energy amount during output suppression is configured to be set as the set suppression output.
For example, as shown in FIG. 3, since the main output is 0.3 kW for the first unit time, 1.0 kW of the temporarily set output larger than 0.3 kW is output. Since the amount of heat generated at the time of increase is the maximum, the 1.0 kW temporarily set output is set as the set increase output. However, the setting increase output is not set for the unit time in which the main output is the maximum output of the fuel cell 1.
Also, for example, as shown in FIG. 4, for the third unit time, since the main output is 0.6 kW, among the temporary setting outputs smaller than 0.6 kW, the temporary setting output of 0.5 kW is Since the difference in energy amount for power generation at the time of output suppression is the smallest, the temporary setting output of 0.5 kW is set as the setting suppression output. However, the setting suppression output is not set for the unit time in which the main output is the minimum output of the fuel cell 1.

The predicted energy reduction amount of the one-day type load following intermittent operation mode is obtained as follows.
That is, when the unit time for causing the power generation output of the fuel cell 1 to follow the predicted power load is set to the unit time at which the predicted energy reduction amount based on the predicted power load and the predicted heat load in the operation cycle that determines the unit time is the largest. The predicted energy reduction amount is obtained as the predicted energy reduction amount in the day-to-day load following intermittent operation mode.

In addition, for each of all the intermittent operation patterns for intermittent operation stored in the memory 31, the power generation output is adjusted to the main output in the operation time zone set in each temporary operation pattern. Assuming that the fuel cell 1 is operated, a predicted energy reduction amount P is obtained based on the above-described equations 9 to 11, and further, a predicted heat output and a predicted hot water storage amount are determined for each unit time of the first operation cycle.
The energy consumption per unit time included in the operation time zone is obtained as the main output by the above formula 12, and the energy consumption per unit time not included in the operation time zone is set to 0. By integrating the consumption amount, the operation cycle energy consumption amount is obtained, and based on the operation cycle energy consumption amount, the energy consumption amount E2 when the fuel cell 1 is operated is obtained by Expression 11.
Further, the predicted heat output of unit time not included in the operation time zone is 0, and the predicted hot water storage amount of unit time not included in the operation time zone is obtained by the above formula 6 with the predicted heat output _n being 0.

  Then, among the temporary operation patterns excluding the pattern 24 in which the entire operation period of all the intermittent operation patterns for the intermittent operation is the operation time period, the temporary operation for the intermittent operation with the highest predicted energy reduction amount is obtained. The operation pattern is obtained, the temporary operation pattern for the intermittent operation is set to the operation pattern of the load following intermittent operation mode corresponding to the daily operation type, and the predicted energy reduction amount of the temporary operation pattern for the intermittent operation is set to the daily operation type. The predicted energy reduction amount of the load following intermittent operation mode is obtained.

The predicted energy reduction amount of the two-day load following intermittent operation mode is obtained as follows.
That is, the unit time for causing the power generation output of the fuel cell 1 to follow the predicted power load is determined by the predicted energy reduction amount based on the predicted power load and the predicted heat load in the operation cycle and the predicted heat load in the second operation cycle. The predicted energy reduction amount when set to the largest unit time is obtained as the predicted energy reduction amount of the two-day load following intermittent operation mode.

In addition, among the temporary operation patterns for all intermittent operations, when the power generation output is adjusted to the main output in the operation time period as described above, the predicted hot water storage amount of the final unit time in the first operation cycle is as follows. A provisional operation pattern larger than 0 is selected as a two-day correspondence type provisional operation pattern.
And, as shown in FIG. 5, assuming that the predicted hot water storage amount of the last unit time of the first operation cycle is used as the predicted heat load of the second operation cycle for all the two-day provisional operation patterns, For each of a plurality of unit times in the second operation cycle, a predicted hot water storage amount (kcal) and a predicted use heat amount (kcal) used as a predicted heat load are obtained.

The predicted amount of stored hot water for each unit time is obtained from the above equation 6 with the predicted heat output _{n set} to zero.
Further, the predicted amount of heat used for each unit time is obtained by the following equations 19 to 21.

When predicted heat storage _n-1 ≥ predicted heat load _n ,
Predicted heat consumption _n = Predictive heat load _n ... (Equation 19)
Predicted hot water storage _n-1 <predicted heat load _n
Predicted heat consumption _n = Predicted hot water storage amount _n-1 (Equation 20)
When the predicted amount of stored hot water _n-1 = 0,
Predicted heat consumption _n = 0 ............ (Formula 21)

For each of the two-day provisional operation patterns, the predicted energy reduction amount P obtained as described above is added to the sum of the predicted heat consumption (converted to kWh) in the second operation cycle as the auxiliary heater 28. The predicted energy reduction amount is obtained by adding the energy consumption in the case of supplementing with the generated heat (total of predicted use heat amount / auxiliary heater thermal efficiency), and the obtained predicted energy reduction amount is divided by 2 to obtain one operation cycle (1 The energy reduction amount per day) is set as the predicted energy reduction amount of the temporary operation pattern of the two-day correspondence type.
Then, a two-day provisional operation pattern having the highest predicted energy reduction amount is obtained from all the two-day provisional operation patterns, and the two-day correspondence provisional operation pattern is determined as a two-day correspondence load follow-up. The operation pattern of the intermittent operation mode is set, and the predicted energy reduction amount of the temporary operation pattern corresponding to the two-day type is obtained as the predicted energy reduction amount of the load following intermittent operation mode corresponding to the two-day type.

The predicted energy reduction amount in the three-day load following intermittent operation mode is obtained as follows.
That is, the unit time for causing the power generation output of the fuel cell 1 to follow the predicted power load is determined based on the predicted power load and the predicted heat load in the operation cycle and the predicted energy based on the predicted heat load in the second and third operation cycles. The predicted energy reduction amount when the reduction amount is determined to be the unit time that is the largest is obtained as the predicted energy reduction amount in the three-day load following intermittent operation mode.

In addition, the temporary operation pattern in which the predicted amount of stored hot water in the final unit time in the second operation cycle is larger than 0 among all the two-day temporary operation patterns is set as the three-day temporary operation pattern. select.
Then, for all the three-day provisional operation patterns, assuming that the predicted hot water storage amount of the last unit time of the second operation cycle is used as the predicted heat load of the third operation cycle, the second operation described above Similarly to the cycle, for each of a plurality of unit times in the third operation cycle, a predicted hot water storage amount and a predicted heat amount used as a predicted heat load are obtained.

For each of the three-day tentative temporary operation patterns, the predicted energy reduction amount P obtained as described above is supplemented with the sum of the predicted heat consumption (converted to kWh) in the second and third operation cycles. The predicted energy reduction amount is obtained by adding the energy consumption (total of predicted use heat amount / auxiliary heater thermal efficiency) when supplementing with the generated heat of the heater 28, and the obtained predicted energy reduction amount is divided by 3 to perform one operation. The amount of energy reduction per cycle (one day) is set as the predicted energy reduction amount of the temporary operation pattern corresponding to the three days.
Then, a 3-day tentative operation pattern having the highest predicted energy reduction amount is obtained from all 3-day tentative operation patterns, and the 3-day responsive temporary operation pattern is determined as a 3-day responsive load follow-up. The operation pattern of the intermittent operation mode is set, and the predicted energy reduction amount of the 3-day correspondence type temporary operation pattern is obtained as the predicted energy reduction amount of the 3-day response type load following intermittent operation mode.

The predicted energy reduction amount of the one-day type forced intermittent operation mode is obtained as follows.
That is, when the unit time for adjusting the power generation output of the fuel cell 1 to the set increase output is set to the unit time in which the predicted energy reduction amount based on the predicted power load and the predicted heat load in the operation cycle for determining the unit time is the largest. Is calculated as the predicted energy reduction amount of the daily intermittent forced intermittent operation mode.

When the explanation is added, among all the temporary operation patterns for intermittent operation stored in the memory 31, all except the pattern formed only in the unit time for which the operation time zone is not set to the set increase output The temporary operation pattern is a temporary operation pattern for forced intermittent operation, and for each temporary operation pattern for forced intermittent operation, the power generation output is adjusted to the set increase output in the operation time zone set in each temporary operation pattern Assuming that the fuel cell 1 is operated, the predicted energy reduction amount P is obtained based on the above equations 9 to 11, and the predicted heat output and the predicted hot water storage amount are obtained for each unit time of the first operation cycle.
The energy consumption per unit time included in the operation time zone is obtained by setting the power generation output as a set increase output according to the above equation 12, the energy consumption per unit time not included in the operation time zone is set to 0, and the energy consumption for each unit time is calculated. By integrating the consumption amount, the operation cycle energy consumption amount is obtained, and based on the operation cycle energy consumption amount, the energy consumption amount E2 when the fuel cell 1 is operated is obtained by Expression 11.

  And among the temporary operation patterns excluding the pattern 24 in which the entire time period of the operation cycle among the temporary operation patterns for all the forced intermittent operation is the operation time zone, the predicted energy reduction amount is the highest for the forced intermittent operation. The temporary operation pattern for the forced intermittent operation is set to the operation pattern of the one-day type forced intermittent operation mode, and the predicted energy reduction amount of the temporary operation pattern for the forced intermittent operation is set to 1. Calculated as the predicted energy reduction amount in the day-to-day forced intermittent operation mode.

The predicted energy reduction amount of the two-day type forced intermittent operation mode is obtained as follows.
That is, the unit time for adjusting the power generation output of the fuel cell 1 to the set increase output is the predicted power reduction amount based on the predicted power load and predicted heat load in the operation cycle and the predicted heat load in the second operation cycle. Is determined as the predicted energy reduction amount of the two-day type forced intermittent operation mode.

In addition, out of all the temporary operation patterns for forced intermittent operation, when the power generation output is adjusted to the set increase output in the operation time period as described above, the predicted amount of stored hot water in the last unit time in the first operation cycle Is selected as the two-day provisional operation pattern.
As with the case of obtaining the predicted energy reduction amount of the two-day type load follow-up intermittent operation mode for all of the two-day type temporary operation patterns, each of the plurality of unit times of the second operation cycle is obtained. The predicted amount of stored hot water and the predicted amount of heat used as the predicted heat load are obtained.

For each of the two-day provisional operation patterns, the predicted energy reduction amount P obtained as described above is added to the total of the predicted use heat amount (converted to kWh) in the second operation cycle as the auxiliary heater 28. The predicted energy reduction amount is obtained by adding the energy consumption when supplementing with the generated heat, and the calculated energy reduction amount per operation cycle is obtained by dividing the obtained predicted energy reduction amount by two. The estimated energy reduction amount of the temporary operation pattern of
Then, a 2-day correspondence temporary operation pattern having the highest predicted energy reduction amount is obtained from all the 2-day correspondence temporary operation patterns, and the 2-day correspondence temporary operation pattern is forcibly interrupted. The operation pattern of the operation mode is set, and the predicted energy reduction amount of the 2-day correspondence type temporary operation pattern is obtained as the predicted energy reduction amount of the 2-day response type forced intermittent operation mode.

The predicted energy reduction amount of the three-day type forced intermittent operation mode is obtained as follows.
That is, the unit time for adjusting the power generation output of the fuel cell 1 to the set increase output is predicted based on the predicted power load and the predicted heat load in the operation cycle and the predicted heat load in the second and third operation cycles. The predicted energy reduction amount when the unit time when the energy reduction amount is the largest is determined as the predicted energy reduction amount of the three-day compatible forced intermittent operation mode.

In addition, the temporary operation pattern in which the predicted amount of stored hot water in the final unit time in the second operation cycle is larger than 0 among all the two-day temporary operation patterns is set as the three-day temporary operation pattern. select.
As with the case of obtaining the predicted energy reduction amount of the three-day correspondence type load follow-up intermittent operation mode for all the three-day provisional operation patterns, each of the plurality of unit times of the third operation cycle is obtained. The predicted amount of stored hot water and the predicted amount of heat used as the predicted heat load are obtained.

For each of the three-day tentative temporary operation patterns, the predicted energy reduction amount P obtained as described above is supplemented with the sum of the predicted heat consumption (converted to kWh) in the second and third operation cycles. The predicted energy reduction amount is obtained by adding the energy consumption amount to be supplemented with the heat generated by the heater 28, and the obtained predicted energy reduction amount is divided by 3 to obtain the energy reduction amount per one operation cycle (one day). This is the predicted energy reduction amount of the three-day tentative temporary operation pattern.
Then, a three-day tentative operation pattern having the highest predicted energy reduction amount is obtained from all three-day tentative temporary operation patterns, and the three-day responsive temporary operation pattern is forcibly intermittent. The operation pattern is set to the operation pattern, and the predicted energy reduction amount of the 3-day correspondence type temporary operation pattern is obtained as the predicted energy reduction amount of the 3-day response type forced intermittent operation mode.

The predicted energy reduction amount of the one day correspondence type suppression intermittent operation mode is obtained as follows.
That is, when the unit time for adjusting the power generation output of the fuel cell 1 to the setting suppression output is set to the unit time in which the predicted energy reduction amount based on the predicted power load and the predicted heat load in the operation cycle for determining the unit time is the largest. Is calculated as the predicted energy reduction amount of the day-to-day suppression intermittent operation mode.

When the explanation is added, among all the temporary operation patterns for intermittent operation stored in the memory 31, all of the operation time zones except for the pattern formed only by the unit time for which the setting suppression output is not set. A state in which the power generation output is adjusted to the set suppression output in the operation time zone set in each temporary operation pattern for each temporary operation pattern for the suppression intermittent operation as the temporary operation pattern for the suppression intermittent operation. Assuming that the fuel cell 1 is operated, the predicted energy reduction amount P is obtained based on the above equations 9 to 11, and the predicted heat output and the predicted hot water storage amount are obtained for each unit time of the first operation cycle.
The energy consumption per unit time included in the operation time zone is obtained by setting the power generation output as a setting suppression output according to the above equation 12, and the energy consumption per unit time not included in the operation time zone is set to 0. By integrating the consumption amount, the operation cycle energy consumption amount is obtained, and based on the operation cycle energy consumption amount, the energy consumption amount E2 when the fuel cell 1 is operated is obtained by Expression 11.

  And among the temporary operation patterns excluding the pattern 24 in which the entire time period of the operation cycle is the operation time zone among all the temporary operation patterns for the suppression intermittent operation, for the suppression intermittent operation with the highest predicted energy reduction amount. The temporary operation pattern for the suppression intermittent operation is set to the operation pattern of the one day correspondence type of the intermittent operation mode, and the predicted energy reduction amount of the temporary operation pattern for the suppression intermittent operation is 1 Calculated as the predicted energy reduction amount for the day-to-day controlled intermittent operation mode.

The predicted energy reduction amount in the two-day-type suppressed intermittent operation mode is obtained as follows.
In other words, the unit time for adjusting the power generation output of the fuel cell 1 to the set suppression output is the predicted energy reduction amount based on the predicted power load and predicted heat load in the operation cycle and the predicted heat load in the second operation cycle. Is determined as the predicted energy reduction amount of the two-day-type suppression intermittent operation mode.

In addition, among the temporary operation patterns for all suppression intermittent operation, when the power generation output is adjusted to the set suppression output in the operation time period as described above, the predicted amount of stored hot water in the last unit time in the first operation cycle Is selected as the two-day provisional operation pattern.
As with the case of obtaining the predicted energy reduction amount of the two-day type load follow-up intermittent operation mode for all of the two-day type temporary operation patterns, each of the plurality of unit times of the second operation cycle is obtained. The predicted amount of stored hot water and the predicted amount of heat used as the predicted heat load are obtained.

For each of the two-day provisional operation patterns, the predicted energy reduction amount P obtained as described above is added to the total of the predicted use heat amount (converted to kWh) in the second operation cycle as the auxiliary heater 28. The predicted energy reduction amount is obtained by adding the energy consumption when supplementing with the generated heat, and the calculated energy reduction amount per operation cycle is obtained by dividing the obtained predicted energy reduction amount by two. The estimated energy reduction amount of the temporary operation pattern of
Then, a 2-day correspondence temporary operation pattern having the highest predicted energy reduction amount is obtained from all the 2-day correspondence temporary operation patterns, and the 2-day correspondence temporary operation pattern is intermittently suppressed. The operation pattern of the operation mode is set, and the predicted energy reduction amount of the two-day correspondence type temporary operation pattern is obtained as the predicted energy reduction amount of the two-day correspondence type suppression intermittent operation mode.

The predicted energy reduction amount of the 3-day response type intermittent intermittent operation mode is obtained as follows.
That is, the unit time for adjusting the power generation output of the fuel cell 1 to the set suppression output is predicted based on the predicted power load and the predicted heat load in the operation cycle and the predicted heat load in the second and third operation cycles. The predicted energy reduction amount when the unit time when the energy reduction amount is the largest is determined as the predicted energy reduction amount in the three-day compatible intermittent intermittent operation mode.

In addition, the temporary operation pattern in which the predicted amount of stored hot water in the final unit time in the second operation cycle is larger than 0 among all the two-day temporary operation patterns is set as the three-day temporary operation pattern. select.
As with the case of obtaining the predicted energy reduction amount of the three-day correspondence type load follow-up intermittent operation mode for all the three-day provisional operation patterns, each of the plurality of unit times of the third operation cycle is obtained. The predicted amount of stored hot water and the predicted amount of heat used as the predicted heat load are obtained.

For each of the three-day tentative temporary operation patterns, the predicted energy reduction amount P obtained as described above is supplemented with the sum of the predicted heat consumption (converted to kWh) in the second and third operation cycles. The predicted energy reduction amount is obtained by adding the energy consumption amount to be supplemented with the heat generated by the heater 28, and the obtained predicted energy reduction amount is divided by 3 to obtain the energy reduction amount per one operation cycle (one day). This is the predicted energy reduction amount of the three-day tentative temporary operation pattern.
Then, a 3-day tentative operation pattern having the highest predicted energy reduction amount is obtained from all the 3-day tentative operation patterns, and the 3-day tentative operation pattern is intermittently suppressed. It sets to the driving | operation pattern of a driving | running form, and calculates | requires the prediction energy reduction amount of the temporary driving | operation pattern of the 3 day correspondence type as a prediction energy reduction amount of the 3rd day correspondence type | mold suppression intermittent operation mode.

And when the said heat surplus unit time exists, the said operation control part 5 calculates | requires the prediction energy reduction amount of a load follow-up continuous operation form, and the prediction energy reduction amount of a suppression continuous operation form as mentioned above, and those The larger one is set as the predicted energy reduction amount of the continuous operation mode, and when the heat shortage unit time exists, the predicted energy reduction amount of the load following continuous operation mode and the predicted energy reduction amount of the forced continuous operation mode are obtained, The larger of them is set as the predicted energy reduction amount in the continuous operation mode.
In addition, the operation control unit 5 calculates the predicted energy reduction amount of the load following intermittent operation mode for each of the one-day correspondence type, the two-day correspondence type, and the three-day correspondence type obtained as described above. And the predicted energy reduction amount of the forced intermittent operation mode for each of the 3-day response type and the predicted energy reduction amount of the suppression intermittent operation mode for each of the 1-day response type, the 2-day response type and the 3-day response type. Among the reduction amounts, the largest one is set as the predicted energy reduction amount in the intermittent operation mode.
Further, the operation control unit 5 determines the operation mode of the fuel cell 1 based on the predicted energy reduction amount of the continuous operation mode and the predicted energy reduction amount of the intermittent operation mode set as described above and the operation mode selection condition.

  That is, as described above, determining the operation mode of the fuel cell 1 based on the predicted energy reduction amount of the continuous operation mode, the predicted energy reduction amount of the intermittent operation mode, and the operation mode selection condition determines the heating operation condition. The heating operation condition is that the heating unit H is heated, that is, the operating time zone in which the fuel cell 1 is operated, the heating amount output from the heating unit H, that is, the fuel These are conditions for determining three conditions: conditions for determining the power generation output of the battery 1 and conditions for determining the amount of hot water stored in the hot water tank 2.

The learning driving control process will be described below based on the flowcharts shown in FIGS.
Even when the fuel cell 1 is stopped, energy (electric power) is consumed, for example, to keep it in a state where power generation is possible, and the fuel cell 1 is stopped in all time zones within the operation cycle. The energy consumed by the cogeneration system during the operation is obtained in advance through experiments or the like and stored in the operation control unit 5 as the standby energy consumption Z.

  As shown in FIGS. 10 and 11, the operation control unit 5 performs the prediction data calculation process and the predicted power load data and the predicted heat load data every time the operation cycle starts (for example, 3 am). Next, driving merit calculation processing is executed (steps # 1 to # 3).

  As shown in FIG. 12, in the operation merit calculation process, when it is assumed that the load following continuous operation mode is performed, if there is a surplus unit time in the operation cycle, the predicted energy reduction amount Pc1 of the load following continuous operation mode, Further, the predicted energy reduction amount Pc2 of the suppressed continuous operation mode is obtained, and further, the predicted energy reduction amount Pc3 of the forced continuous operation mode is set to the set value J for checking, and the operation is performed assuming that the load following continuous operation mode is performed. When the heat shortage unit time exists in the cycle, the predicted energy reduction amount Pc1 of the load following continuous operation mode and the predicted energy reduction amount Pc3 of the forced continuous operation mode are obtained, and the predicted energy reduction amount of the suppression continuous operation mode is further obtained. When Pc2 is set to the set value J and it is assumed that the load follow-up continuous operation mode is performed, neither the heat surplus unit time nor the heat shortage unit time exists in the operation cycle. In this case, the predicted energy reduction amount Pc1 of the load following continuous operation mode is obtained, and the predicted energy reduction amount Pc2 of the suppression continuous operation mode and the predicted energy reduction amount Pc3 of the forced continuous operation mode are determined as the set value J (step # 101-105).

  Incidentally, the set value J corresponds to various predicted power loads and predicted thermal loads, the predicted energy reduction amount Pc1 of the load following continuous operation mode, the predicted energy reduction amount Pc2 of the suppression continuous operation mode, and the prediction of the forced continuous operation mode. The energy reduction amount Pc3 is set to be smaller than the minimum value predicted to be obtained. If it is predicted that the minimum value is obtained as a negative value, the set value J is set to a negative value having an absolute value larger than the minimum value.

  Subsequently, the predicted energy reduction amount Pi1 of the day-based load follow-up intermittent operation mode, the predicted energy reduction amount Pi2 of the one-day type suppression intermittent operation mode, the predicted energy reduction amount of the one-day type forced intermittent operation mode. Pi3, predictive energy reduction amount Pi4 in the 2-day compatible type load following intermittent operation mode Pi4, predictive energy reduction amount Pi5 in the 2-day compatible type intermittent intermittent operation mode Pi5, predicted energy reduction amount Pi6 in the 2-day compatible type forced intermittent operation mode Predicted energy reduction amount Pi7 of the 3-day compatible type load following intermittent operation mode Predicted energy reduction amount Pi8 of the 3-day compatible type of intermittent intermittent operation mode Pi8 Predicted energy reduction amount Pi9 of the 3-day compatible type forced intermittent operation mode (Step # 106).

As shown in FIGS. 10 and 11, in step # 4, it is determined whether or not the predicted energy reduction amount Pc1 in the load following continuous operation mode is equal to or greater than the set reduction amount G. 1 is defined as the load following continuous operation mode, and when the predicted energy reduction amount Pc1 of the load following continuous operation mode is smaller than the set reduction amount G, the predicted energy reduction amount Pc2 of the suppressed continuous operation mode is the set reduction amount G. When it is determined whether or not it is equal to or greater than the set reduction amount G, the operation mode of the fuel cell 1 is set to the suppression continuous operation mode, and the predicted energy reduction amount Pc2 of the suppression continuous operation mode is smaller than the set reduction amount G Determines whether the predicted energy reduction amount Pc3 in the forced continuous operation mode is equal to or greater than the set reduction amount G. If the predicted energy reduction amount Pc3 is equal to or greater than the set reduction amount G, the operation mode of the fuel cell 1 is determined as the forced continuous operation mode (step # 4-9), when the predicted energy reductions Pc3 forced continuous operation mode is smaller than the set reduction amount G, the procedure moves to step # 10.
Incidentally, the set value J for checking is set to a value smaller than the set reduction amount G.

  In step # 10, the heat load coverage rate U / L indicating the extent to which the predicted heat load of the operation cycle can be covered by the amount of stored hot water at the start of the operation cycle is obtained. In step # 11, the obtained heat load coverage rate U is obtained. / L and the lower set value K are compared, and if the thermal load coverage rate U / L is greater than the lower set value K, it is determined that the standby condition is satisfied, and the thermal load coverage rate U / L is the lower set value. When it is less than or equal to K, it is determined that the standby condition is not satisfied.

Incidentally, L of the thermal load coverage ratio U / L is the predicted heat load of the operation cycle obtained by summing the predicted heat loads of each unit time of the first operation cycle.
Moreover, U of the thermal load coverage ratio U / L is predicted to be covered by the amount of stored hot water at the start of the first operation cycle out of the predicted heat load of the first operation cycle, assuming the predicted heat output of the fuel cell 1 as 0. Predicted amount of heat used.
For example, assuming that the start time of the operation cycle is the state of the start time of the second operation cycle shown in FIG. 5, L represents the predicted heat load of each unit time of the operation cycle as shown in FIG. As shown in FIG. 5, U is a total value of predicted usage heat amounts for each unit time of the operation cycle.
The lower set value K is set to 0.4, for example.

  That is, since there is heat radiation from the hot water tank 2, when obtaining the heat load coverage rate indicating the extent to which the predicted heat load in the first operation cycle can be covered by the amount of hot water stored in the hot water tank 2 at the start of the first operation cycle. Rather than using the amount of hot water stored in the hot water tank 2 at the start of the first operation cycle, it is predicted that the predicted heat load of the first operation cycle can be covered by the amount of stored hot water at the start of the first operation cycle. Since the direction using the heat usage amount U can consider the heat radiation from the hot water tank 2, it is possible to appropriately obtain the thermal load bridging rate.

  When it is determined in step # 11 that the standby condition is not satisfied, among the predicted energy reduction amounts Pc1, Pc2, and Pc3 of the three types of continuous operation modes of the load following continuous operation mode, the suppression continuous operation mode, and the forced continuous operation mode Is set as the predicted energy reduction amount Pc in the continuous operation mode, the load following intermittent operation mode for one day type, the suppressed intermittent operation mode for one day type, the forced intermittent operation mode for one day type, 2 Day-to-day load follow-up intermittent operation mode, 2-day-to-day controlled intermittent operation mode, 2-day-to-day forced intermittent operation mode, 3-day-to-day load follow-up intermittent operation mode, and 3-day-to-day suppression / intermittent operation mode And the predicted energy reduction amounts Pi1, Pi2, Pi3, Pi4, Pi5, Pi6, Pi7, Pi8, and Pi9 of the nine types of intermittent intermittent operation modes corresponding to the three-day correspondence type are intermittently operated. Set to the predicted energy reductions Pi (step # 12).

  Subsequently, in step # 14, the maximum of the predicted energy reduction amount Pc in the continuous operation mode and the predicted energy reduction amount Pi in the intermittent operation mode is smaller than the negative value “−Z” of the standby energy consumption Z. By determining whether or not, it is more energy saving to execute one of the continuous operation mode and the intermittent operation mode than to enter the standby mode in which the fuel cell 1 is stopped in the entire time period of the operation cycle. Judge what will be.

  That is, the energy consumption amount when the continuous operation mode or the intermittent operation mode is executed is larger than the energy consumption amount when the fuel cell 1 is not operated, and the predicted energy reduction amount Pc of the continuous operation mode or the prediction of the intermittent operation mode is obtained. The energy reduction amount Pi may be obtained as a negative value, but the largest of the predicted energy reduction amount Pc in the continuous operation mode and the predicted energy reduction amount Pi in the intermittent operation mode is on standby regardless of the sign. When the hourly energy consumption Z is larger than the negative value “−Z”, the energy saving is achieved by executing either the continuous operation mode or the intermittent operation mode rather than the standby mode.

  In step # 14, the maximum of the predicted energy reduction amount Pc in the continuous operation mode and the predicted energy reduction amount Pi in the intermittent operation mode is smaller than the negative value “−Z” of the standby energy consumption Z. When it is determined that there is not, in step # 15, it is determined whether the predicted energy reduction amount Pi of the intermittent operation mode is the maximum among the predicted energy reduction amount Pc of the continuous operation mode and the predicted energy reduction amount Pi of the intermittent operation mode. When the predicted energy reduction amount Pi of the intermittent operation mode is the maximum, the operation mode of the fuel cell 1 is determined as the intermittent operation mode having the maximum predicted energy reduction amount among the nine types of intermittent operation modes (step # 17). ) When the predicted energy reduction amount Pi of the intermittent operation mode is not the maximum, the operation mode of the fuel cell 1 is the continuous operation with the maximum predicted energy reduction amount among the three continuous operation modes. Prescribed in the state (step # 16).

  If it is determined in step # 11 that the standby condition is satisfied, it is determined in step # 18 whether or not the fuel cell 1 is in operation. If it is in operation, in step # 19, the thermal load coverage rate is determined. When it is determined whether or not U / L is larger than the upper set value M, which is larger than the lower set value K, and it is determined that it is not larger, in step # 20, the operation of continuing the operation of the fuel cell 1 is continued. Determine whether the condition is met.

  That is, all the temporary operation patterns stored in the memory 31 that assume the operation time period as a driving time period after the start time and in which the number of unit times is 1 to a set number (for example, 10). For each of the above, assuming that the power generation output is adjusted to the main output during the operation time period, it is determined whether or not the amount of stored hot water in the final unit time in the first operation cycle is 0, and the amount of stored hot water is assumed to be 0. When the operation pattern exists, it is possible to continue the operation of the fuel cell 1 with the hot water in the hot water tank 2 used up, and it is determined that the operation continuation condition is satisfied, and the temporary operation pattern in which the amount of stored hot water becomes 0 When is not present, it is determined that the operation continuation condition is not satisfied.

When it is determined in step # 20 that the operation continuation condition is satisfied, in step # 21, the operation mode of the fuel cell 1 is set to the load following operation continuation mode, and in step # 22, the operation continuation time is set. Execute the time setting process.
In the operation continuation time setting process, the temporary operation pattern in which the predicted energy reduction amount P is the maximum among the temporary operation patterns determined in step # 20 that the stored hot water amount in the final unit time in the first operation cycle becomes zero. Set the operation time zone to the operation continuation time.
That is, the energy consumption amount E2 when the fuel cell 1 is operated is obtained by the above equation 11 for each of the temporary operation patterns determined that the amount of stored hot water in the last unit time in the first operation cycle becomes 0 in step # 20. Then, by substituting the obtained energy consumption amount E2 and the energy consumption amount E1 obtained when the fuel cell 1 is not operated according to the equation 10 into the equation 9, the estimated energy reduction amount P is obtained and the obtained predicted energy is obtained. The operation time zone of the temporary operation pattern with the maximum reduction amount P is set as the operation continuation time.

  In Step # 14, when the maximum of the predicted energy reduction amount Pc in the continuous operation mode and the predicted energy reduction amount Pi in the intermittent operation mode is smaller than the negative value “−Z” of the standby energy consumption Z. When it is determined, when it is determined at step # 18 that the fuel cell 1 is stopped, when it is determined at step # 19 that the thermal load coverage ratio U / L is larger than the upper set value M, step If it is determined in # 20 that the operation continuation condition is not satisfied, the standby mode is set (step # 23).

The operation control means 5 operates the fuel cell 1 in the operation mode determined in the learning operation control process.
That is, when the operation mode of the fuel cell 1 is set to the load following continuous operation mode, the current power load following operation that causes the power generation output of the fuel cell 1 to follow the current power load currently requested over the entire time period of the operation cycle. Execute.
In the current power load follow-up operation, the current power load is obtained for each relatively short predetermined output adjustment period such as one minute, and continuously within the range from the minimum output (for example, 300 W) to the maximum output (for example, 1000 W). The operation is performed in such a manner that the main output following the electric power load is determined and the power generation output of the fuel cell 1 is adjusted to the determined main output.
The current power load is measured based on the measured value of the power load measuring means 11 and the output value of the inverter 6, and the current power load is sampled at the sampling time in the previous output adjustment period. Calculated as the average value of the data.

When the operation mode of the fuel cell 1 is set to the suppression continuous operation mode, the power generation output of the fuel cell 1 is adjusted to the setting suppression output in the unit time determined to set the power generation output of the fuel cell 1 to the setting suppression output, Current power load following operation is executed in other unit time.
When the operation mode of the fuel cell 1 is set to the forced continuous operation mode, the power generation output of the fuel cell 1 is adjusted to the set increase output in the unit time determined to set the power generation output of the fuel cell 1 to the set increase output, Current power load following operation is executed in other unit time.

Even if the operation mode of the fuel cell 1 is determined to be any one of the load follow-up intermittent operation of the one-day correspondence type, the two-day correspondence type, and the three-day correspondence type, the current power load follow-up operation is performed in the unit time included in the operation time zone. The fuel cell 1 is stopped during the unit time included in the stop time zone.
When the operation mode of the fuel cell 1 is determined to be any one of the one-day correspondence type, two-day correspondence type, and three-day correspondence type intermittent intermittent operation, the setting suppression output is set in the unit time included in the operation time zone. In the unit time, the power generation output of the fuel cell 1 is adjusted to the set suppression output, and the fuel cell 1 is stopped in the unit time included in the stop time zone.
When the operation mode of the fuel cell 1 is determined to be any one of the one-day type, two-day type, and three-day type forced intermittent operation, the set increase output is set in the unit time included in the operation time zone. In a certain unit time, the power generation output of the fuel cell 1 is adjusted to the set increase output, and the fuel cell 1 is stopped in the unit time included in the stop time zone.

  That is, the learning operation control process is executed every time when the operation cycle starts, and in the learning operation control process, as described above, the thermal load coverage ratio U / L is larger than the lower set value K and the standby condition is set. When it is determined that the fuel cell 1 is stopped, when it is determined that the fuel cell 1 is stopped, when it is determined that the fuel cell 1 is in operation and the thermal load coverage ratio U / L is greater than the upper set value M, and In any case where it is determined that the fuel cell 1 is in operation and the thermal load coverage ratio U / L is not more than the upper set value M and does not satisfy the operation continuation condition, the standby mode is set. Therefore, in the previous learning operation control process, the 2-day response type or the 3-day response type load follow, suppression, or forced intermittent operation mode is set, and the current learning operation control process is performed at the time point 2 Intermittent operation mode of day correspondence type or three day correspondence type When the standby mode is set as described above in the learning operation control process when it corresponds to the start time of the second operation cycle in this case, 2 in the 2-day correspondence type or the 3-day correspondence type intermittent operation mode. The fuel cell 1 is stopped over the entire time period of the second operation cycle, and the 2-day correspondence type or the 3-day correspondence type intermittent operation mode is continued.

  In the 2-day or 3-day intermittent operation mode, the actual heat load in the first operation cycle is larger than the predicted heat load, or in the 3-day intermittent operation mode, 2 When it is determined that the actual thermal load in the second operation cycle is greater than the predicted thermal load and the thermal load coverage ratio U / L is lower than the lower set value K and does not satisfy the standby condition, It will be determined in the intermittent operation mode.

  Further, when it is determined that the thermal load coverage rate U / L is larger than the lower set value K and the standby condition is satisfied, the fuel cell 1 is in operation and the thermal load coverage rate U / L is equal to or lower than the upper set value M. When it is determined that the operation continuation condition is satisfied, the operation of the fuel cell 1 is continued in the load following operation while the hot water in the hot water tank 2 is used up. It becomes possible to sufficiently cover the heat load of the cycle, and energy saving can be further improved.

[Second Embodiment]
Hereinafter, although 2nd Embodiment of this invention is described, this 2nd Embodiment demonstrates another embodiment of the control action in the auxiliary | assistant heating action control process of the operation control part 5, and prediction data calculation process. Since the overall configuration of the cogeneration system is the same as that of the first embodiment, the description of the overall configuration of the cogeneration system is omitted, and mainly the control operations in the auxiliary heating operation control process and the prediction data calculation process are described. To do.

First, the auxiliary heating operation control process will be described.
In the auxiliary heating operation control process, the operation control unit 5 sends out the feed when the feed temperature detected by the feed temperature sensor So is lower than the target hot water temperature set by the target hot water temperature setting means C. When the temperature difference between the temperature and the target hot water supply temperature is within the set temperature for water mixing, water mixing by the water mixing valve 34 for lowering the temperature of the hot water after water mixing to the set temperature for water mixing lower than the target hot water supply temperature The auxiliary heating is performed so that the operation of the water mixing valve 34 is controlled so that the mixing amount of water becomes the determined mixing amount, and the detected temperature of the hot water supply temperature sensor 41 becomes the target hot water supply temperature. When the temperature difference between the delivery temperature and the target hot water supply temperature is larger than the set temperature for water mixing, the mixing water channel 33 side is closed so that the mixing amount of water is zero. The operation of the water mixing valve 34 Gyoshi, and the detected temperature of the hot water supply temperature sensor 41 is configured to adjust the combustion amount of the auxiliary heater 28 so that the target hot-water supply temperature.
Incidentally, the set temperature for water mixing is set to 5 ° C., for example.

  In addition, in the auxiliary heating operation control process, the operation control unit 5 performs the above operation when the delivery temperature detected by the delivery temperature sensor So is equal to or higher than the target hot water temperature set by the target hot water temperature setting means C. As in the first embodiment, the operation of the water mixing valve 34 is controlled so as to adjust the water mixing amount so that the temperature of the hot water detected by the hot water temperature sensor 41 becomes the target hot water temperature. The auxiliary heater 28 is configured not to be heated.

  Next, the prediction data calculation process will be described. In the second embodiment, another process for correcting the time-series actual heat load data in the generation time zone of the high temperature heat load data to the load decreasing side is described. Since the configuration is described and the other configuration is the same as that of the first embodiment, processing for correcting the actual thermal load data to the load decreasing side will be mainly described.

For the actual hot water supply heat load data per unit time in the time-series actual hot water supply heat load data, the operation control unit 5 determines that the target hot water temperature set by the target hot water supply temperature setting means C is the hot water tank 2. In the generation time zone of the high-temperature heat load data corresponding to a state higher than the set hot water temperature that can be discharged from the hot water, the hot water with the correction set flow rate is calculated from the heat quantity Qs measured by the hot water supply heat load measuring means N every sampling time The amount of heat obtained by reducing the amount of heat corresponding to the amount of combustion of the auxiliary heater 28 for increasing the correction set temperature is used as the actual hot water supply heat load data for each sampling time, and other than the generation time zone of the high temperature heat load data In the time zone, the amount of heat Qs measured by the hot water supply thermal load measuring means N for each sampling time is used as the actual hot water supply thermal load data for each sampling time. By integrating the actual hot-water supply heat load data, and is configured to determine the actual hot-water supply heat load data for each unit time.
Incidentally, in the second embodiment, the set temperature for correction is set to the set temperature for water mixing, and the set flow for correction is set to the set flow for washing dishes.

The operation control unit 5 obtains the amount of heat Qs based on the above equation 1 in the generation time zone of the high temperature heat load data in a state where the target hot water supply temperature is set to the target hot water supply temperature for washing dishes. As in the first embodiment, the hot water supply temperature Ts is set to the target hot water supply temperature for dishwashing, and the hot water supply flow rate Fs is set to the set flow rate for dishwashing.
Further, the operation control unit 5 performs the above-described equation 1 in the generation time zone of the high temperature thermal load data in a state where the target hot water supply temperature higher than the set hot water temperature is set by the hot water supply temperature setting unit 36. When obtaining the heat quantity Qs based on the above, similarly to the first embodiment, the hot water supply temperature Ts is set to the target hot water supply temperature set by the hot water supply temperature setting unit 36, and the hot water supply flow rate Fs is set to the hot water supply flow rate. The detection flow rate of the sensor 42 is used.

  That is, in the second embodiment, the operation control unit 5 determines the amount of heating of the auxiliary heater 28 for increasing the correction set temperature of the hot water at the correction set flow rate in the prediction data calculation process. As the amount of heating, the time-series actual heat load data in the generation time zone of the high temperature heat load data is corrected to the load decreasing side.

[Third Embodiment]
Hereinafter, although 3rd Embodiment of this invention is described, this 3rd Embodiment demonstrates another embodiment of the control action in the structure of the water mixing means B and the auxiliary heating operation control process of the operation control part 5. FIG. However, since the configuration of the cogeneration system other than the mixing unit B and the control operations in various processes other than the auxiliary heating operation control process are the same as those in the first embodiment, the configuration of the water mixing unit B is mainly used. The control operation in the auxiliary heating operation control process of the operation control unit 5 will be described.

As shown in FIG. 13, the mixed water channel 44 branched from the water supply channel 29 is located downstream of the auxiliary heating heat exchanger 28 a in the hot water supply channel 27, that is, downstream of the auxiliary heater 28. A water mixing valve 45 capable of adjusting the mixing ratio of the hot water sent from the hot water tank 2 and the water supplied from the mixing water channel 44 is provided at the connecting point.
That is, the mixed water channel 44 and the water mixing valve 45 mix water with hot water flowing through the hot water supply channel 27 at a location downstream of the auxiliary heater 28 and adjust the amount of the mixed water. A flexible water mixing means B is configured.

  In the auxiliary heating operation control process, the operation control unit 5 uses the target temperature set by the target hot water supply temperature setting means C in the auxiliary heating operation control process. When the temperature is lower than the hot water supply temperature, the hot water sent from the hot water tank 2 is targeted based on the hot water temperature detected by the delivery temperature sensor So and the hot water flow rate detected by the hot water flow rate sensor 42. A necessary combustion amount of the auxiliary heater 28 required for heating to the hot water supply temperature is obtained, and it is determined whether or not the obtained necessary combustion amount is larger than a minimum combustion amount in a combustion amount adjustment range of the auxiliary heater 28. When the required combustion amount is larger than the minimum combustion amount, the combustion amount of the auxiliary heater 28 is adjusted so that the detected temperature of the hot water supply temperature sensor 41 becomes the target hot water supply temperature, and the mixing amount of water is adjusted. 0 Therefore, the operation of the water mixing valve 45 is controlled so as to close the mixed water channel 44 side, and when the required combustion amount is less than the minimum combustion amount, the combustion amount of the auxiliary heater 28 is adjusted to the minimum combustion amount. In addition, the operation of the water mixing valve 45 is controlled so that the temperature of the hot water supplied to the heat consuming unit becomes the target hot water supply temperature.

  However, in the third embodiment, the operation control unit 5 controls the operation of the water mixing valve 45 for setting the temperature of the hot water supplied to the heat consuming unit to the target hot water supply temperature. The operation of the water mixing valve 34 is controlled so as to adjust the amount of water mixing so that the temperature of the hot water detected at the above becomes the target hot water supply temperature.

  In addition, in the auxiliary heating operation control process, the operation control unit 5 determines that the delivery temperature detected by the delivery temperature sensor So is equal to or higher than the target hot water supply temperature set by the target hot water supply temperature setting means C. The operation of the water mixing valve 45 is controlled so as to adjust the water mixing amount so that the temperature of the hot water detected by the hot water supply temperature sensor 41 becomes the target hot water supply temperature, and the auxiliary heater 28 is not heated. It is configured.

[Fourth Embodiment]
Hereinafter, although 4th Embodiment of this invention is described, this 4th Embodiment is another implementation of the control operation in the structure of the water mixing means B, the auxiliary heating operation control process of the operation control part 5, and the prediction data calculation process. The configuration of the cogeneration system other than the mixing unit B and the control operations in various processes other than the auxiliary heating operation control process and the prediction data calculation process are the same as those in the first embodiment. Therefore, mainly the configuration of the water mixing unit B and the control operation in the auxiliary heating operation control process and the prediction data calculation process of the operation control unit 5 will be described.
However, since the configuration of the water mixing means B is the same as that of the third embodiment, description thereof is omitted.

In the auxiliary heating operation control process, the operation control unit 5 sends out the feed when the feed temperature detected by the feed temperature sensor So is lower than the target hot water temperature set by the target hot water temperature setting means C. When the temperature difference between the temperature and the target hot water supply temperature is within the set temperature for auxiliary heating, the delivery temperature detected by the delivery temperature sensor So and the flow rate detected by the flow sensor built in the auxiliary heater 28 Based on the above, a combustion amount for heating the hot water to a temperature that is higher than the target hot water supply temperature is set to the auxiliary heating set temperature, the auxiliary heater 28 is heated with the calculated combustion amount, and the The operation of the water mixing valve 45 is controlled to adjust the water mixing amount so that the temperature of the hot water detected by the hot water temperature sensor 41 becomes the target hot water temperature, and the temperature between the delivery temperature and the target hot water temperature. The difference is compensated When the temperature is higher than the set temperature for heating, the combustion amount of the auxiliary heater 28 is adjusted so that the detected temperature of the hot water supply temperature sensor 41 becomes the target hot water supply temperature, and the mixing amount of water is set to 0, The operation of the water mixing valve 45 is controlled so as to close the mixed water channel 44 side.
Incidentally, the set temperature for auxiliary heating is set to 5 ° C., for example.

  In addition, in the auxiliary heating operation control process, the operation control unit 5 performs the above operation when the delivery temperature detected by the delivery temperature sensor So is equal to or higher than the target hot water temperature set by the target hot water temperature setting means C. As in the first embodiment, the operation of the water mixing valve 45 is controlled to adjust the water mixing amount so that the temperature of the hot water detected by the hot water temperature sensor 41 becomes the target hot water temperature, The auxiliary heater 28 is configured not to be heated.

Since the control operation in the prediction data calculation process of the operation control unit 5 is the same as that of the second embodiment, the description thereof is omitted.
However, in the generation time zone of the high temperature heat load data, the auxiliary heater for increasing the correction set temperature of the hot water at the correction flow rate from the heat quantity Qs measured by the hot water supply heat load measuring means N at every sampling time. In the fourth embodiment, the correction set temperature is set to the auxiliary heating set temperature in the process of using the heat quantity obtained by reducing the heat quantity corresponding to the combustion quantity of 28 as the actual hot water supply heat load data for each sampling time. The set flow rate for correction is set to the set flow rate for washing dishes.

[Fifth Embodiment]
Hereinafter, a fifth embodiment of the present invention will be described. This fifth embodiment will explain another embodiment of the control operation in the prediction data calculation process, and the overall configuration of the cogeneration system is the first. Since it is the same as that of embodiment, description is abbreviate | omitted about the whole structure of a cogeneration system, and the control operation | movement in a prediction data calculation process is mainly demonstrated.
And especially in the said prediction data calculation process, when the high temperature heat load data corresponding to the state where the said target hot-water supply temperature is higher than the said set hot-water temperature exists, in order to manage time-sequential actual heat load data The other control operations in the prediction data calculation process are the same as those in the first embodiment, and therefore, the first of the prediction data calculation processes is mainly described. A control operation different from the embodiment will be described.

  That is, in the prediction data calculation process, when the operation control unit 5 has high temperature heat load data corresponding to a state in which the target hot water supply temperature is higher than a set hot water temperature at which hot water can be discharged from the hot water storage tank 2, The time-series predicted heat load data is obtained using the time-series actual heat load data excluding the generation time zone of the high-temperature heat load data as the time-series actual heat load data.

  In other words, the operation control unit 5 calculates the heat quantity Qs measured by the hot water supply thermal load measuring means N for each sampling time in the time zone other than the generation time zone of the high temperature thermal load data. As hot water supply heat load data, actual hot water supply heat load data for each unit time is obtained by integrating actual hot water supply heat load data for each sampling time.

[Another embodiment]
Next, another embodiment will be described.
(A) In each of the above embodiments, the time zone in which the target hot water temperature higher than the set hot water temperature is set by the target hot water temperature setting means C is set as the generation time zone of the high temperature thermal load data. Although illustrated, the time zone in which the temperature detected by the hot water supply temperature sensor 41 is higher than the set hot water temperature may be configured to be the generation time zone of the high temperature thermal load data.

(B) In the prediction data calculation process, when the high temperature heat load data corresponding to the state where the target hot water supply temperature is higher than the set hot water temperature exists, the operation control unit 5 generates the high temperature heat load data. When the time-series actual heat load data excluding the time zone is used as the time-series actual heat load data to obtain the time-series predicted heat load data, the fifth embodiment Instead of the control operation, the following control operation may be used.
In other words, the heat quantity measured by the hot water supply thermal load measuring means N at every sampling time is sampled as the actual hot water supply thermal load data at every sampling time in both the generation time zone of the high temperature thermal load data and other time zones. The actual hot water supply heat load data for each unit time is obtained by integrating the actual hot water supply heat load data for each hour.
When obtaining time-series predicted hot water supply heat load data, time-series predicted hot water supply data based on actual hot water supply heat load data for each unit time excluding the unit time including the generation time zone of high-temperature heat load data. Configure to determine thermal load data.

(C) In each of the above embodiments, the amount of heat Qs based on the above equation 1 in the generation time zone of the high-temperature thermal load data in a state where the target hot water temperature is set to the target hot water temperature for washing dishes. , The hot water supply temperature Ts is set as the target hot water supply temperature for dishwashing, and the hot water supply flow rate Fs is set as the set flow rate for dishwashing. The detected temperature of the hot water supply temperature sensor 41 may be used, and the hot water supply flow rate Fs may be set as the detected flow rate of the hot water supply flow rate sensor 42.
Further, in each of the above embodiments, in the generation time zone of the high temperature thermal load data in a state where the target hot water temperature higher than the set hot water temperature is set by the hot water temperature setting unit 36, the above formula 1 When the amount of heat Qs is obtained based on the above, the case where the hot water supply temperature Ts is set to the target hot water supply temperature set by the hot water supply temperature setting unit 36 is exemplified. You may comprise as follows.

(D) In each of the above embodiments, the case where the feed water temperature Ti is set as the detected temperature of the feed water temperature sensor 43 when obtaining the heat quantity Qs based on the above formula 1 is illustrated. You may comprise so that it may become set temperature.

(E) In each of the above-described embodiments, the time series data obtained by accumulating the actual hot water supply thermal load data for each sampling time per unit time is managed as time series actual hot water load data. Although illustrated, actual hot water supply thermal load data for each sampling time may be managed as time-series actual hot water supply thermal load data.

(F) In each of the above-described embodiments, the heating operation condition is defined as a condition for determining an operating time zone in which the fuel cell 1 is operated, a condition for determining the power generation output of the fuel cell 1, and the amount of stored hot water in the hot water tank 2. Although the case where the three conditions of the condition are set as the conditions is illustrated, the condition for determining the operation time zone in which the fuel cell 1 is operated, the condition for determining the power generation output of the fuel cell 1, and the amount of hot water stored in the hot water tank 2 are determined. You may comprise so that it may be set as the conditions which determine any one or two of conditions.
In the case where the heating operation condition is a condition for determining an operation time zone for operating the fuel cell 1, for example, an intermittent operation mode is configured, and the operation time zone is set so as to increase the operation merit. It will be configured as follows.
Further, when the heating operation condition is a condition for determining the power generation output of the fuel cell 1, for example, among the load following continuous operation form, the suppression continuous operation form and the forced continuous operation form, the operation form having the highest operation merit is selected. It will be configured to select.

(G) In each of the first to fourth embodiments, a hot water supply passage for supplying hot water having a target hot water temperature higher than the set hot water temperature from the hot water supply passage 27, and the set hot water temperature. When a normal hot water supply path for supplying hot water of the following target hot water supply temperature is branched and a hot water supply load is generated simultaneously in the high temperature hot water supply path and the normal hot water supply path, Only time-series actual hot water supply thermal load data generated in the hot water supply passage may be corrected to the load decreasing side.

(H) In the fifth embodiment, a hot water supply passage for supplying hot water having a target hot water temperature higher than the set hot water temperature from the hot water supply passage 27, and a target hot water temperature equal to or lower than the set hot water temperature. When a hot water supply load is generated at the same time in the hot water supply path and the normal hot water supply path by branching off from the normal hot water supply path for supplying hot water, the hot water supply path for high temperature is used in the prediction data calculation process. It may be configured to exclude only the time-series actual hot water supply heat load data generated in step.

(L) In each of the first, second and fifth embodiments described above, the operation control unit 5 is controlled to operate the water mixing valve 34 constituting the water mixing means B. A dedicated control means for controlling the operation of the water mixing valve 34 may be provided.
In each of the third and fourth embodiments, the operation control unit 5 is controlled to operate the water mixing valve 45 constituting the water mixing unit B. A dedicated control means for controlling the operation of the valve 45 may be provided.

(Nu) The driving merit is not limited to the energy saving such as the predicted energy reduction amount exemplified in each of the above embodiments. For example, the economics such as the predicted energy cost reduction amount and the predicted carbon dioxide reduction Environmental properties such as quantity may be used.
Incidentally, the predicted energy cost reduction amount can be obtained by subtracting the energy cost when the fuel cell 1 is operated from the energy cost when the fuel cell 1 is not operated.
The energy cost when the fuel cell 1 is not operated includes the cost when purchasing all of the predicted power load from the commercial power source 7 and the energy cost when supplying the predicted heat load with the auxiliary heater 28 (fuel cost). ).
On the other hand, the energy cost when the fuel cell 1 is operated is estimated as the energy cost (fuel cost) of the fuel cell 1 when the predicted power load and the predicted heat load are supplemented with the predicted generated power and the predicted generated heat of the fuel cell 1. Auxiliary heaters for the cost of purchasing power from the commercial power supply 7 corresponding to the amount obtained by subtracting the predicted generated power from the power load, and the short heat load corresponding to the amount obtained by subtracting the predicted heat usage from the predicted heat load It is obtained as the sum of the energy cost (fuel cost) when supplementing with the generated heat of 28.

The predicted carbon dioxide reduction amount can be obtained by subtracting the carbon dioxide generation amount when the fuel cell 1 is operated from the carbon dioxide generation amount when the fuel cell 1 is not operated.
The amount of carbon dioxide generated when the fuel cell 1 is not operated is the amount of carbon dioxide generated when all of the predicted power load is purchased from the commercial power source 7 and when the predicted heat load is covered by the auxiliary heater 28. Calculated as the sum of carbon dioxide generation.
On the other hand, the amount of carbon dioxide generated when the fuel cell 1 is operated is the amount of carbon dioxide generated from the fuel cell 1 when the predicted power load and the predicted heat load are supplemented with the predicted generated power and the predicted generated heat of the fuel cell 1, and The amount of carbon dioxide generated when power is purchased from the commercial power source 7 corresponding to the amount obtained by subtracting the predicted power generation from the predicted power load, and the amount of heat shortage corresponding to the amount obtained by subtracting the predicted heat usage from the predicted heat load Is calculated as the sum of the amount of carbon dioxide generated when the heat generated by the auxiliary heater 28 is supplemented.

(L) In each of the above embodiments, the case where the heat consuming terminal 3 is provided is illustrated, and the heat load is a combination of the hot water supply heat load and the terminal heat load, but the heat consuming terminal 3 is not provided. In this case, the heat load is only the hot water supply heat load. Further, when the temperature of the heat medium required in the heat consuming terminal 3 is higher than the temperature of the cooling water from which the heat generated from the fuel cell 1 is recovered, the heat consuming terminal 3 is provided with the heat Use only hot water supply heat load.

(V) Although the fuel cell 1 is applied in each of the above-described embodiments as a combined heat and power supply device, in addition to this, for example, various devices such as a configuration in which a generator is driven by a gas engine may be applied. Can do.

(W) In the above-described embodiment, the heating unit H is exemplified for the case where the heat generated from the combined heat and power supply device is used as the heat source. However, a dedicated heat source such as a gas burner, an electric heater, or an electric heat pump is used. It can comprise, and it can comprise so that the heat generated from the engine drive type heat pump which drives a compressor with a gas engine, a gasoline engine, etc. may be used as a heat source.

The block diagram which shows the whole structure of the cogeneration system which concerns on each 1st and 2nd embodiment The block diagram which shows the control structure of the cogeneration system which concerns on each 1st and 2nd embodiment Explanatory drawing which shows the driving | running state and heat utilization state of a fuel cell with respect to the prediction electric power load and prediction heat load in the first driving | operation period Explanatory drawing which shows the driving | running state and heat utilization state of a fuel cell with respect to the prediction electric power load and prediction heat load in the first driving | operation period Explanatory drawing which shows the heat utilization state with respect to the predicted heat load in the second operation cycle Diagram showing battery power generation efficiency and battery thermal efficiency The figure explaining the temporary operation pattern for forced operation and suppression operation The figure explaining the temporary operation pattern of intermittent operation form The figure which shows the increase amount of energy at the time of output increase and the required energy amount difference at the time of output suppression The figure which shows the flowchart of the control action in learning driving | operation control processing The figure which shows the flowchart of the control action in learning driving | operation control processing The figure which shows the flowchart of the control action in learning driving | operation control processing The block diagram which shows the whole structure of the cogeneration system which concerns on each 3rd and 4th embodiment

Explanation of symbols

2 Hot water storage tank 5 Operation control means 27 Hot water supply path 28 Auxiliary heating means B Water mixing means C Target hot water temperature setting means H Heating means N Thermal load measuring means

Claims (6)

A hot water storage tank connected to a hot water supply path for sending stored hot water to the heat consuming unit, a heating means for heating the hot water stored in the hot water storage tank, and an auxiliary heating means for heating the hot water flowing through the hot water supply path And a thermal load measuring means for measuring the amount of hot water supplied to the heat consuming section through the hot water supply path, and a target hot water temperature setting means capable of changing and setting the target hot water temperature supplied to the heat consuming section. And an operation control means for controlling the operation,
The operation control means is
The amount of heat measured by the heat load measuring means is managed as time-series actual heat load data, and time-series predicted heat load data is based on the time-series actual heat load data being managed. Expected data calculation processing,
The heating operation condition is determined such that the hot water stored in the hot water tank is heated so as to be heated to the target hot water temperature and the operation merit is increased based on the time-series predicted heat load data. A heating operation control process for controlling the heating operation of the heating means,
A hot water storage type hot water supply device configured to execute an auxiliary heating operation control process for controlling a heating operation of the auxiliary heating means so that a temperature of the hot water supplied to the heat consuming unit becomes the target hot water supply temperature; There,
In the prediction data calculation process, the operation control means
When high temperature heat load data corresponding to a state in which the target hot water supply temperature is higher than a set hot water temperature that can be discharged from the hot water storage tank exists, time-series actual heat load data excluding the high temperature heat load data is obtained. A hot water storage type hot water supply apparatus configured to obtain the time-series predicted heat load data as the time-series actual heat load data. A hot water storage tank connected to a hot water supply path for sending stored hot water to the heat consuming unit, a heating means for heating the hot water stored in the hot water storage tank, and an auxiliary heating means for heating the hot water flowing through the hot water supply path And a thermal load measuring means for measuring the amount of hot water supplied to the heat consuming section through the hot water supply path, and a target hot water temperature setting means capable of changing and setting the target hot water temperature supplied to the heat consuming section. And an operation control means for controlling the operation,
The operation control means is
The amount of heat measured by the heat load measuring means is managed as time-series actual heat load data, and time-series predicted heat load data is based on the time-series actual heat load data being managed. Expected data calculation processing,
The heating operation condition is determined such that the hot water stored in the hot water tank is heated so as to be heated to the target hot water temperature and the operation merit is increased based on the time-series predicted heat load data. A heating operation control process for controlling the heating operation of the heating means,
A hot water storage type hot water supply device configured to execute an auxiliary heating operation control process for controlling a heating operation of the auxiliary heating means so that a temperature of the hot water supplied to the heat consuming unit becomes the target hot water supply temperature; There,
In the prediction data calculation process, the operation control means
When high-temperature heat load data corresponding to a state in which the target hot-water supply temperature is higher than a set hot water temperature that can be discharged from the hot water storage tank exists, a time-series actual heat load in the generation time zone of the high-temperature heat load data A hot water storage type hot water supply apparatus configured to obtain the time-series predicted heat load data using the time-series actual heat load data obtained by correcting the data to the load decreasing side as the time-series actual heat load data . In the prediction data calculation process, the operation control means
By reducing the auxiliary heating amount that is the heating amount of the auxiliary heating means in the generation time zone of the high temperature thermal load data, the time-series actual thermal load data in the generation time zone of the high temperature thermal load data is reduced to the load reduction side. The hot water storage type hot water supply apparatus according to claim 2, wherein the hot water storage apparatus is configured to correct. Water is mixed with hot water flowing at a location upstream or downstream of the auxiliary heating means in the hot water supply passage, and water mixing means capable of adjusting the mixing amount of the water is provided,
In the prediction data calculation process, the operation control unit uses the minimum heating amount in the heating amount adjustment range of the auxiliary heating unit or a heating amount close to the minimum heating amount as the auxiliary heating amount, and the generation time of the high-temperature heat load data The hot water storage type hot water supply apparatus according to claim 3, which is configured to correct time-series actual heat load data in a belt to a load decreasing side.   In the prediction data calculation process, the operation control means uses the heating amount of the auxiliary heating means for raising the set flow rate of hot and cold water as the auxiliary heating amount as a time series in the generation time zone of the high temperature thermal load data. The hot water storage type hot water supply apparatus according to claim 3, wherein the actual heat load data is corrected to the load decreasing side.   The heating operation condition defines at least one of a condition for determining an operation time zone for heating the heating means, a condition for determining a heating amount output by the heating means, and a condition for determining the amount of hot water stored in the hot water tank. The hot water storage type hot water supply apparatus according to any one of claims 1 to 5, which is a condition.

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