JP2014056429A - Energy management system, energy management device and method and program for energy management - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have accommodation of heat generated in a co-generation system be capable in between facilities in a region.SOLUTION: An energy management system includes: a plurality of hot water storage tanks provided corresponding to each facility in an energy management region for storing hot water; power generators provided corresponding to at least some facilities among the facilities including the hot water storage tanks for supplying power for load in the facilities; heat recovery devices provided corresponding to facilities provided with these power generators for recovering the heat generated by power generation by the power generators and having hot water with temperature risen by the recovered heat be stored in the hot water storage tanks provided to the corresponding facilities; a hot water piping installation piped so that receiving hot water is capable of being carried out mutually between a plurality of hot water storage tanks; and an energy management device for controlling so that receiving of hot water is carried out through the hot water piping installation in between the plurality of hot water tanks.

Description

  The present invention relates to an energy management system, an energy management device, an energy management method, and a program.

  For example, as described in Patent Document 1, a shared low voltage line is provided for transmitting or receiving power between houses and local facilities in the area, and when there is surplus power in the area, surplus power to the local storage battery is There is known a power interchange system that stores power and transmits stored power of a regional storage battery to a shared low-voltage line when surplus power decreases.

  For example, a cogeneration system is known in which consumption of commercial power is suppressed by using a fuel cell or the like, and heat generated by the discharge of the fuel cell is recovered and reused.

JP 2012-60761 A

For example, if the heat generated in the cogeneration system can be interchanged between facilities in the area against the background described above, the energy efficiency in the entire area is further improved, which is preferable.
However, in Patent Document 1, for example, only a configuration for accommodating stored power stored in a regional storage battery provided in a region is described. In other words, depending on the technique described in Patent Document 1, it is difficult to exchange heat in a cogeneration system between facilities in a region.

  The present invention has been made in view of such circumstances, and an object thereof is to allow heat generated in a cogeneration system to be interchanged between facilities in a region.

  In order to solve the above-described problem, an energy management system according to one aspect of the present invention is provided for each facility in a region, and a plurality of hot water storage tanks for storing hot water and a facility including the plurality of hot water storage tanks. Of the power generation device that is provided corresponding to at least some of the facilities, and that is provided for the facility including the power generation device, and that is generated by the power generation of the power generation device. A heat recovery device that recovers heat and stores the hot water whose temperature has been raised by the recovered heat in a hot water tank provided in the corresponding facility, and piping so that the hot water is mutually received between the plural hot water tanks And an energy management device that controls the hot water to be received between the plurality of hot water storage tanks via the hot water piping facility.

  Further, in the energy management system of the present invention, the energy management device includes a hot water storage state information acquisition unit that acquires hot water storage state information including predetermined information related to a hot water storage state of the hot water storage tank for each of the plurality of hot water storage tanks, Based on the hot water storage state information, a hot water tank determination unit that determines a hot water tank that is a hot water supply source and a hot water tank that is a hot water supply destination, and hot water stored in the hot water supply source hot water tank is passed through the hot water piping facility. And a hot water supply control unit that executes control for supplying the hot water supply destination hot water storage tank.

  In the energy management system of the present invention, the hot water storage state information may be information including at least a part of the hot water storage amount, the hot water temperature, the hot water storage capacity and the predicted hot water usage.

  Moreover, the energy management apparatus as one aspect of the present invention is provided for each facility in the region, and a plurality of hot water tanks for storing hot water and at least a part of the facilities including the plurality of hot water tanks. A power generation device that is provided corresponding to the facility and supplies power to a load in the facility; and a heat generation device that is provided corresponding to the facility including the power generation device and recovers heat generated by the power generation of the power generation device. A heat recovery device that stores hot water whose temperature has been raised by the heat generated in a hot water storage tank provided in the corresponding facility, and hot water piping equipment that is piped so that the hot water is mutually received between the plurality of hot water storage tanks. An energy management device provided in the energy management system provided, wherein hot water storage state information is acquired for each of the plurality of hot water storage tanks, and includes hot water storage state information having information related to the hot water storage state of the hot water storage tanks. An acquisition unit, a hot water tank determination unit that determines a hot water supply source hot water storage tank and a hot water supply destination hot water storage tank based on the hot water storage state information, and hot water stored in the hot water supply source hot water storage tank. A hot water supply control unit that executes control for supplying the hot water storage tank to which the hot water is supplied via a piping facility.

  Moreover, the energy management method as one aspect of the present invention is provided corresponding to each facility in the region, and a plurality of hot water storage tanks for storing hot water and at least a part of the facilities including the plurality of hot water storage tanks. A power generation device that is provided corresponding to the facility and supplies power to a load in the facility; and a heat generation device that is provided corresponding to the facility including the power generation device and recovers heat generated by the power generation of the power generation device. A heat recovery device that stores hot water whose temperature has been raised by the heat generated in a hot water storage tank provided in the corresponding facility, and hot water piping equipment that is piped so that the hot water is mutually received between the plurality of hot water storage tanks. An energy management method for an energy management device provided in an energy management system provided with a hot water storage state information acquisition unit having information related to the state of hot water storage in a hot water tank A hot water storage state acquisition step for each of the plurality of hot water storage tanks, and a hot water storage tank determination unit for determining a hot water supply source hot water storage tank and a hot water supply destination hot water storage tank based on the hot water storage state information. And a hot water supply control unit that performs control for supplying hot water stored in the hot water storage tank of the hot water supply source to the hot water storage tank of the hot water supply destination via the hot water piping facility A control step.

  Further, the program as one aspect of the present invention is provided for each facility in a region, and a plurality of hot water storage tanks for storing hot water and at least some of the facilities including the plurality of hot water storage tanks. A power generation device that is provided correspondingly and that supplies power to a load in the facility, and that is provided corresponding to the facility including the power generation device, recovers heat generated by power generation of the power generation device, and recovers the recovered heat Energy comprising: a heat recovery device that stores hot water whose temperature has been raised by a hot water storage tank provided in a corresponding facility; and hot water piping equipment that is piped so as to receive hot water between the plurality of hot water storage tanks Hot water storage for acquiring hot water storage state information having information related to the hot water storage state of the hot water storage tank for each of the plurality of hot water storage tanks in a computer as an energy management device provided in the management system A state information acquisition step, a hot water tank determination step for determining a hot water supply source hot water tank and a hot water supply destination hot water tank based on the hot water storage state information, and hot water stored in the hot water supply source hot water tank, And a hot water supply control step for executing control for supplying the hot water supply destination hot water storage tank via the hot water piping facility.

  As described above, according to the present invention, there is an effect that heat generated in the cogeneration system can be interchanged between facilities in the area.

It is a figure which shows the structural example of the energy management system in this embodiment. It is a figure which shows the structural example of the electric power grid | system in the facility of this embodiment. It is a figure which shows the structural example of the cogeneration system system | strain in the facility of this embodiment. It is a figure which shows the structural example of the facility energy management apparatus in this embodiment. It is a figure which shows the example of the content of the hot water storage status information in this embodiment. It is a figure which shows the structural example of the energy management apparatus in this embodiment. It is a figure which shows the example of a process sequence which the facility energy management apparatus in this embodiment performs corresponding to receipt of warm water between hot water storage tanks. The example of the process sequence which the energy management apparatus in this embodiment performs corresponding to receipt of the warm water between hot water storage tanks is shown. It is a figure which shows the example of a process sequence for determining the hot water storage tank of a hot water supply source, and the hot water storage tank of a hot water supply destination which the energy management apparatus in this embodiment performs. It is a figure which shows the example of a process sequence regarding control of the amount of hot water of the hot water storage tank of a hot water supply source, and the hot water storage tank of a hot water supply destination which the energy management apparatus in this embodiment performs. The example of the process sequence which the energy management apparatus in the modification of this embodiment performs is shown.

[Configuration example of energy management system]
FIG. 1 shows a configuration example of a cogeneration system system in the energy management system according to the present embodiment.
The energy management system in this embodiment manages the energy utilized in the some plant | facility 10 (10-1 to 10-5) in the area of the fixed range shown as the energy management area 1, for example. Such an energy management system corresponds to what is called a TEMS (Town Energy Management System), a CEMS (Community Energy Management System), or the like.

  In the energy management area 1 of FIG. 1, the case where five facilities 10-1 to 10-5 exist is shown. Hereinafter, the facilities 10-1 to 10-5 will be referred to as the facility 10 when it is not necessary to distinguish between them. The facility 10 is, for example, a house, a commercial facility, an industrial facility, a public facility, or the like.

Moreover, the hot water storage tanks 20-1 to 20-5 are provided for each of the facilities 10-1 to 10-5 in the energy management area 1 and store hot water. The hot water storage tanks 20-1 to 20-5 are referred to as hot water storage tanks 20 when it is not necessary to distinguish between them. In the following description, “hot water” and “hot water” are used as synonymous terms.
The hot water storage tank 20 can take in cold water from, for example, a water supply facility, increase the temperature of the cold water taken in using the power of a commercial power source, and convert it into hot water (hot water) for storage. Moreover, about the hot water storage tank 20 in which the fuel cell 30 is provided in the same facility 10 among the hot water storage tanks 20, the temperature of the stored water is utilized using the heat generated when the fuel cell 30 generates power. Can also be raised.
The hot water stored in the hot water tank 20 is supplied to various facilities that use the hot water in the facility 10. Further, it can be supplied to another hot water tank 20 via the hot water piping facility 300. The hot water tank 20 can also take in hot water supplied from another hot water tank 20 via the hot water piping facility 300.

  Of the facilities 10-1 to 10-5, the facilities 10-1, 10-2, and 10-3 are provided with fuel cells 30-1, 30-2, and 30-3, respectively. In the following description, the fuel cells 30-1, 30-2, and 30-3 are referred to as the fuel cell 30 when it is not necessary to distinguish between them.

The fuel cell (power generation device) 30 is provided corresponding to at least a part of the facilities 10 among the facilities 10 provided with the plurality of hot water tanks 20, and supplies power to the load of the corresponding facility 10, for example.
The fuel cell 30 is a power generator that continuously discharges by reacting a replenishable negative electrode active material (for example, hydrogen) with a positive electrode active material (oxygen in the air, etc.). The fuel cell 30 can be permanently discharged by continuously replenishing the negative electrode active material and the positive electrode active material.

  In addition, in the facility 10 including the fuel cell 30, the temperature of the water supplied to the hot water tank 20 can be increased using heat generated when the fuel cell 30 generates power. Thereby, for example, it becomes possible to effectively suppress the use of the power of the commercial power supply when converting the water supplied to the hot water tank 20 into hot water.

In addition, a hot water piping facility 300 is connected to the hot water storage tanks 20-1 to 20-5. The hot water piping facility 300 is piped so that the hot water is received between the plurality of hot water tanks 20 in the energy management area 1.
Since the hot water storage tanks 20-1 to 20-5 are connected to the hot water piping facility 300, the hot water storage tanks 20-1 to 20-5 are connected to the other hot water storage tanks 20 via the hot water piping facility 300, respectively. The stored hot water can be supplied. The hot water storage tanks 20-1 to 20-5 can supply hot water stored by themselves to the other hot water storage tanks 20 via the hot water piping facility 300.

Thereby, for example, even in the hot water storage tanks 20-4 and 20-5 in the facilities 10-4 and 10-5 that do not include the fuel cell 30, hot water storage in the other facilities 10-1, 10-2, and 10-3. Hot water can be supplied from the tanks 20-1, 20-2, and 20-3 via the hot water piping facility 300. Thereby, also in the facilities 10-4 and 10-5 that do not include the fuel cell 30, it is possible to suppress the use of the commercial power source when hot water is stored in the hot water storage tanks 20-4 and 20-5.
That is, the energy management system of the present embodiment constructs a cogeneration system that can exchange hot water in the hot water tank 20 throughout the facility 10 in the energy management area 1. Thereby, the usage-amount of fuels, such as a commercial power supply and gas, in the energy management area 1 whole can be suppressed efficiently.

Moreover, in FIG. 1, the facility energy management apparatuses 100-1 to 100-5 are provided for each of the facilities 10-1 to 10-5. Hereinafter, the facility energy management devices 100-1 to 100-5 will be referred to as the facility energy management device 100 when it is not necessary to distinguish between them.
The facility energy management apparatus 100 performs control of electrical equipment in the corresponding facility 10, control of the hot water tank 20, and the like. When the hot water is exchanged between the hot water storage tanks 20 via the hot water piping facilities 300, the facility energy management apparatus 100 is provided with a pump provided for the corresponding hot water storage tank 20, for example, in accordance with an instruction from the energy management apparatus 200. By appropriately controlling, the hot water is discharged from the corresponding hot water tank 20 or the hot water is taken into the corresponding hot water tank 20.

The energy management apparatus 200 performs power control on the electrical equipment in the entire facility 10 belonging to the energy management area 1. In addition, control is performed so that hot water is received (accommodated) between the hot water tanks 20 in the energy management area 1 via the hot water piping facility 300.
For this hot water supply control, the energy management device 200 causes the facility energy management device 100 to discharge hot water from the hot water tank 20 to the hot water piping facility 300 or to take in hot water from the hot water piping facility 300. Instruct. The energy management apparatus 200 and the facility energy management apparatus 100 of each facility 10 are connected to be communicable with each other via a communication network such as a network.
In addition, the energy management apparatus 200 executes control for forming the hot water supply path in the hot water piping facility 300 so that the hot water is supplied from the hot water storage tank 20 as the hot water supply source to the hot water storage tank 20 as the hot water supply destination. . Specifically, for example, the energy management device 200 controls the opening and closing of a valve provided at a predetermined position in the piping forming the hot water piping facility 300.

  For example, the facility energy management apparatus 100 may be omitted, and the energy management apparatus 200 may directly control the electrical equipment, the hot water tank 20, the fuel cell 30, and the like in each facility 10. However, in the present embodiment, the energy management apparatus 200 and the facility energy management apparatus 100 are provided, and control is hierarchically performed in the entire energy management area 1 and the facility 10, for example, the control of the energy management apparatus 200 is complicated. Is avoiding.

[Example of power system configuration at the facility]
FIG. 2 shows a configuration example of a power system corresponding to one facility 10. The configuration shown in this figure is for the facility 10 in which the fuel cell 30 is provided.
The power system of the facility 10 shown in FIG. 2 includes an inverter 40, a distribution board 50, a load 60, and hot water utilization equipment 70 in addition to the hot water tank 20, the fuel cell 30, and the facility energy management apparatus 100 shown in FIG.

The inverter 40 converts direct current power output from the fuel cell 30 into alternating current, and supplies the alternating current to the load 60 and the hot water tank 20 via the distribution board 50.
The distribution board 50 supplies the electric power output from the inverter 40 to the load 60 and the hot water tank 20 and the electric power of the commercial power supply 2 to the load 60 and the hot water tank 20 according to the control of the facility energy management apparatus 100. Switch with the route to be supplied.

The facility energy management apparatus 100 controls, for example, the power generation operation of the fuel cell 30, the power conversion operation of the inverter 40, and the switching of the power path in the distribution board 50 under FIG. The facility energy management apparatus 100 of the present embodiment corresponds to an in-home energy management system called HEMS (Home Energy Management System).
Furthermore, the facility energy management apparatus 100 can also control operations such as supplying water to the hot water tank 20 and discharging hot water from the hot water tank 20. In addition, for example, when the hot water in the hot water tank 20 is created by the heat generated in the fuel cell 30, the facility energy management apparatus 100 may appropriately stop the power supply from the commercial power source 2 to the hot water tank 20. it can.

As shown in FIG. 2, a hot water supply pipe 31, a hot water supply pipe 32, and a hot water supply pipe 33 are connected to the hot water storage tank 20.
The water supply pipe 31 is a pipe for taking cold water supplied from, for example, a water supply facility into the hot water tank 20.
The hot water supply pipe 32 is a pipe for supplying the hot water stored in the hot water storage tank 20 to the hot water use facility 70 in the corresponding facility 10.
Here, the hot water use facility 70 differs depending on the environment of the facility 10, but as an example, if it is a general household, it is a hot water supply facility in a kitchen or a bath. For example, if the facility 10 is a gymnasium or the like, a pool or the like can be included in the hot water use facility 70. For example, although not a building, a road heating system for heating a road in a cold region can also be included in the hot water utilization facility 70.
The hot water receiving pipe 33 is a pipe that discharges the hot water stored in the hot water tank 20 to the hot water pipe facility 300 in order to supply the hot water tank 20 to the other hot water tank 20, and the other hot water tank 20 through the hot water pipe facility 300. This is a tube for taking in hot water supplied from the hot water storage tank 20.

[Configuration example of a cogeneration system system in a facility]
FIG. 3 shows a configuration example of a cogeneration system system corresponding to one facility 10. As shown in this figure, the cogeneration system system in one facility 10 includes a hot water tank 20, a fuel cell 30, and a heat recovery pipe 80.
The heat recovery pipe 80 functions as a heat recovery device, recovers heat generated by the power generation of the fuel cell 30, and supplies hot water whose temperature is increased by the recovered heat to the hot water storage tank 20 provided in the corresponding facility 10. It is something to be stored.

The hot water storage tank 20 can further supply the cold water supplied from the water supply pipe 31 to the heat recovery pipe 80.
The heat recovery pipe 80 has a fuel cell pipe section 81 in the pipe. The fuel cell piping part 81 is arranged so as to recover the heat generated in the fuel cell 30. The structure of the piping as the fuel cell piping portion 81 is not particularly limited, but it is preferable that the piping is connected to the fuel cell 30 so that heat can be efficiently recovered from the fuel cell 30.

  The cold water supplied to the heat recovery pipe 80 passes through the fuel cell piping part 81. As a result, heat is recovered from the fuel cell 30, and the cold water is warmed by the recovered heat, and the temperature rises to become hot water. The water thus obtained passes through the heat recovery pipe 80 downstream from the fuel cell pipe portion 81 and is supplied again to the hot water tank 20. The hot water tank 20 stores the hot water supplied as described above, and supplies the hot water from the hot water supply pipe 32 to the hot water use facility 70 as necessary, or discharges it from the hot water supply pipe 33 to the hot water piping facility 300 as described above. Can be supplied to another hot water tank 20.

  As described above, in the facility 10 including the fuel cell 30, the heat generated by the fuel cell 30 can be recovered and the water can be warmed to produce hot water. In addition, as described above, by receiving hot water between the hot water storage tanks 20, in this embodiment, a cogeneration system including the entire energy management area 1 is constructed instead of each facility 10. Thereby, in the energy management system of this embodiment, it is possible to suppress the power consumption of the commercial power supply 2 and the fuel consumption such as gas in the entire energy management area 1.

[Configuration example of facility energy management system]
FIG. 4 shows a configuration example of the facility energy management apparatus 100 corresponding to the control for receiving the hot water between the hot water tanks 20.
The facility energy management apparatus 100 shown in this figure includes an information input unit 101, a predicted hot water volume calculation unit 102, a hot water storage state information generation unit 103, and a hot water storage state information transmission unit 104.
The information input unit 101 inputs hot water tank related information from the hot water tank 20 provided in the corresponding facility 10. The hot water tank-related information includes, for example, information such as the amount of hot water stored, hot water temperature, and hot water usage history.

  The hot water storage tank 20 constantly detects, for example, the amount of hot water stored in the hot water stored by itself and the hot water temperature, and the stored hot water is used by the hot water use facility 70 as its history (use of hot water storage). (History) is stored. The information input unit 101 inputs hot water storage amount and hot water temperature information detected in the hot water tank 20, and inputs hot water use history stored in the hot water tank 20.

  The predicted hot water volume calculating unit 102 calculates the predicted hot water volume based on the hot water storage history as hot water tank related information input by the information input unit 101. The predicted amount of hot water used is a value obtained by predicting the amount of hot water used by the hot water use facility 70 in the corresponding facility 10 in a predetermined period after the present time. The predicted hot water volume calculation unit 102 may calculate the predicted hot water volume using, for example, weather forecast information in addition to the hot water storage history information.

For example, the hot water storage state information generation unit 103 can store hot water amount and hot water temperature input as information related to the hot water tank by the information input unit 101, predicted hot water amount calculated by the predicted hot water amount calculation unit 102, and hot water storage in the corresponding hot water tank 20. Hot water storage state information is generated according to the capacity.
The hot water storage state information transmission unit 104 transmits the hot water storage state information generated by the hot water storage state information generation unit 103 to the energy management apparatus 200.

The hot water storage state information is information including predetermined information related to the hot water storage state in the hot water storage tank 20.
FIG. 5 shows a structure example of the hot water storage state information generated by the hot water storage state information generation unit 103. As shown in this figure, the hot water storage state information includes information on the amount of hot water storage, hot water temperature, hot water storage capacity, and predicted hot water usage.
The hot water storage amount and hot water temperature in the hot water storage state information indicate values of the hot water storage amount and hot water temperature input by the information input unit 101.
The hot water storage capacity in the hot water storage state information indicates the maximum capacity in which the hot water can be stored in the corresponding hot water storage tank 20. The hot water storage capacity may be stored in advance in the hot water storage state information generation unit 103 as information used for generating hot water storage state information, for example. Note that the hot water storage capacity may be appropriately input by the hot water storage state information generation unit 103 as hot water tank related information. However, the hot water storage capacity does not change with the passage of time like the hot water storage amount and the hot water temperature, but is fixed according to the corresponding hot water storage tank 20, and is stored in advance in the hot water storage state information generation unit 103. If so, the amount of information communicated with the hot water tank 20 can be reduced.
The predicted hot water volume in the hot water storage state information indicates the value of the predicted hot water volume calculated by the predicted hot water volume calculator 102.

[Configuration example of facility energy management system]
FIG. 6 shows a configuration example of the energy management device 200 corresponding to the control for receiving (accommodating) hot water between the hot water tanks 20.
The energy management apparatus 200 shown in this figure includes a hot water storage state information acquisition unit 201, a hot water tank determination unit 202, and a hot water supply control unit 203.

  The hot water storage state information acquisition unit 201 acquires hot water storage state information for each of the plurality of hot water storage tanks 20 in the facility 10. For example, as described above, the facility energy management device 100 of each facility 10 generates hot water storage state information about the hot water storage tank 20 in the corresponding facility 10 at regular intervals, and transmits the generated hot water storage state information. The hot water storage state information acquisition unit 201 acquires hot water storage state information for each hot water tank 20 by receiving the hot water storage state information transmitted from the facility energy management device 100 of each facility 10.

  The hot water tank determination unit 202 determines the hot water supply source hot water storage tank 20 and the hot water supply destination hot water storage tank 20 based on the hot water storage state information acquired by the hot water storage state information acquisition unit 201.

The hot water supply control unit 203 executes control for supplying the hot water stored in the hot water storage tank 20 of the hot water supply source to the hot water storage tank 20 of the hot water supply destination via the hot water piping facility 300.
At this time, the hot water supply control unit 203 transmits an instruction to discharge the hot water from the hot water tank 20 to the hot water piping facility 300 to the facility energy management apparatus 100 of the facility 10 including the hot water tank 20 as a hot water supply source. In response to this instruction, the facility energy management apparatus 100 of the facility 10 including the hot water supply source hot water storage tank 20 controls the hot water supply pipe 33 to discharge the hot water through the hot water supply source hot water storage tank 20.
Further, the hot water reception control unit 203 transmits an instruction for taking in hot water supplied from the hot water piping facility 300 to the facility energy management apparatus 100 of the facility 10 including the hot water storage tank 20 as a hot water supply destination. In response to this instruction, the facility energy management apparatus 100 of the facility 10 including the hot water supply destination hot water storage tank 20 performs control so that the hot water supplied from the hot water supply pipe 33 is taken in by the hot water supply destination hot water storage tank 20. .
Further, the hot water supply control unit 203 is configured so that, in the hot water piping facility 300, a piping path for supplying the hot water discharged from the hot water storage tank 20 as the hot water supply source to the hot water storage tank 20 as the hot water supply destination is formed. Controls the opening and closing of valves and pumps provided in the hot water piping facility 300.

[Example of processing procedure]
The flowchart of FIG. 7 shows an example of a processing procedure executed by the facility energy management apparatus 100 in response to the interchange of hot water between the hot water tanks 20.
The information input unit 101 waits for a fixed time to elapse (step S101—NO). As the fixed time elapses (step S101—YES), the information input unit 101 communicates with the hot water tank 20 in the corresponding facility 10 and inputs hot water tank related information from the hot water tank 20 (step S101). S102). As shown in FIG. 4, the hot water tank related information includes, for example, a hot water storage amount, a hot water temperature, and a hot water storage usage history.

  Next, the predicted hot water volume calculation unit 102 calculates the predicted hot water volume based on the hot water storage history input as hot water tank related information in step S101 (step S103).

  Next, the hot water storage state information generation unit 103 generates hot water storage state information (step S104). Specifically, for example, the hot water storage state information generation unit 103 stores the hot water storage amount and hot water temperature input as hot water tank-related information in step S101, the predicted hot water volume calculated in step S102, and the hot water storage capacity that the self stores, for example. To generate hot water storage state information.

Next, the hot water storage state information transmission unit 104 transmits the hot water storage state information generated in step S104 to the energy management apparatus 200 (step S105). After the process of step S105, the hot water storage state information transmission unit 104 returns the process to step S101.
As described above, the facility energy management apparatus 100 transmits, for example, hot water storage state information updated every predetermined time to the energy management apparatus 200.

  The flowchart of FIG. 8 shows an example of a processing procedure executed by the energy management apparatus 200 in response to receiving hot water between the hot water tanks 20. In addition, what is necessary is just to make it perform the process shown to this figure for every predetermined time predetermined corresponding to receipt control of the hot water between the hot water storage tanks 20, for example.

As shown in FIG. 7, hot water storage state information updated at regular intervals is transmitted from the facility energy management apparatus 100.
The hot water storage state information acquisition unit 201 receives the hot water storage state information transmitted from the facility energy management device 100 of each facility 10 when, for example, a predetermined time at which the hot water supply control between the hot water storage tanks 20 is to be executed is reached ( Step S201). In this way, the hot water storage state information acquisition unit 201 acquires hot water storage state information about the hot water storage tank 20 of each facility 10.

  Next, the hot water tank determination unit 202 determines the hot water supply source hot water tank 20 and the hot water supply destination hot water tank 20 based on the hot water storage state information about the hot water storage tank 20 of each facility 10 acquired in step S201. (Step S202).

  Next, the hot water supply control unit 203 performs control for supplying hot water from the hot water supply source hot water storage tank 20 determined in step S203 to the hot water supply destination hot water storage tank 20 via the hot water piping facility 300. Execute (Step S203).

The flowchart of FIG. 9 shows an example of a specific processing procedure for determining the hot water supply source hot water storage tank 20 and the hot water supply destination hot water storage tank 20 as step S203 of FIG.
First, the hot water tank determination unit 202 calculates the amount of excess or insufficient hot water in the hot water tank 20 in each facility 10.
The surplus hot water volume is an absolute value of the difference between the hot water storage volume and the predicted hot water volume when the hot water volume is equal to or greater than the predicted hot water volume. The insufficient hot water volume is an absolute value of the difference between the hot water storage volume and the predicted hot water volume when the hot water storage volume is less than the predicted hot water volume.
When calculating the surplus hot water amount or the insufficient hot water amount, the hot water storage tank determination unit 202 uses the hot water storage amount and the predicted hot water amount in the hot water storage state information to compare and subtract both, and if the subtraction value is converted to an absolute value, Good. For example, as a result of comparing the amount of stored hot water and the predicted amount of hot water used, if the amount of stored hot water is equal to or greater than the amount of predicted hot water used, the absolute value of the value obtained by subtracting the predicted amount of hot water from the amount of stored hot water is the surplus amount of hot water. On the contrary, as a result of comparing the amount of stored hot water and the predicted amount of hot water used, if the amount of stored hot water is less than the predicted amount of used hot water, the absolute value of the value obtained by subtracting the predicted amount of used hot water from the amount of stored hot water is the amount of insufficient hot water.

Next, the hot water storage tank determination unit 202 determines the hot water storage tank 20 having the maximum surplus hot water amount obtained in step S301 as the hot water supply source (step S302).
Moreover, the hot water storage tank determination part 202 determines the hot water storage tank 20 with the largest amount of insufficient hot water calculated | required by step S301 as a hot water supply destination (step S303).

The flowchart of FIG. 10 shows an example of a processing procedure related to the control of the hot water storage amount of the hot water storage tank 20 as the hot water supply source and the hot water storage tank 20 as the hot water supply destination in the hot water supply control in step S203 of FIG.
First, the hot water supply control unit 203 executes control for starting the supply of hot water from the hot water storage tank 20 as the hot water supply source to the hot water storage tank 20 as the hot water supply destination (step S401). Therefore, as described above, the hot water supply control unit 203 controls the hot water to be discharged from the hot water storage tank 20 as the hot water supply source to the hot water piping facility 300 and the hot water piping facility to the hot water supply tank 20 as the hot water supply destination. Control for taking in hot water supplied from 300 is executed. Further, the hot water supply control unit 203 controls the hot water piping facility 300 so that hot water is supplied from the hot water storage tank 20 as the hot water supply source to the hot water storage tank 20 as the hot water supply destination.

  After receiving hot water in step S401, the amount of hot water stored in the hot water storage tank 20 to which the hot water is supplied changes so as to increase. Therefore, the hot water supply control unit 203 acquires hot water storage state information transmitted from the facility energy management apparatus 100 corresponding to the hot water storage destination hot water tank 20 in order to monitor the amount of hot water stored in the hot water storage destination hot water storage tank 20. (Step S402).

  Next, the hot water supply control unit 203 determines that the amount of hot water stored in the hot water storage state information acquired in step S <b> 402 (the current hot water storage amount of the hot water storage destination hot water tank 20) is greater than or equal to the predicted hot water supply amount of the hot water supply destination hot water storage tank 20. It is determined whether or not (step S403). Note that the predicted amount of hot water used in the hot water storage tank 20 to which the hot water is supplied is included in the hot water storage state information received in step S402.

In addition, since the supply of hot water is started in step S401, the amount of hot water stored in the hot water storage tank 20 of the hot water supply source changes so as to decrease. Therefore, when the current hot water storage amount of the hot water supply source hot water storage tank 20 is less than the predicted hot water supply amount (step S403-NO), the hot water supply control unit 203 stores hot water in the hot water supply source hot water storage tank 20 as follows. Execute processing to monitor the amount.
That is, the hot water receipt control unit 203 acquires hot water storage state information transmitted from the facility energy management apparatus 100 corresponding to the hot water storage tank 20 that is the hot water supply source (step S404). Then, it is determined whether or not the amount of hot water stored in the hot water storage state information acquired in step S404 (the current hot water storage amount of the hot water storage hot water tank 20) is equal to or less than the predicted hot water supply amount of the hot water storage source hot water tank 20 (see FIG. Step S405).
When the current hot water storage amount of the hot water supply source hot water tank 20 is larger than the predicted hot water supply amount (NO in step S405), the hot water supply control unit 203 returns the process to step S402.

  The state in which the current hot water storage amount of the hot water storage tank 20 to which the hot water is supplied has increased beyond the predicted hot water supply amount is a state in which it is no longer necessary to increase the hot water storage amount. Accordingly, when the current hot water storage amount of the hot water supply destination hot water storage tank 20 is equal to or greater than the predicted hot water supply amount (YES in step S403), the hot water supply control unit 203 starts the hot water supply source hot water storage tank started in step S401. Control for stopping the hot water supply from the hot water supply destination 20 to the hot water storage tank 20 from 20 is executed (step S406).

Further, there is a limit to the amount of hot water that can be supplied by the hot water storage tank 20 of the hot water supply source. The hot water stored in the hot water storage tank 20 of the hot water supply source is used by the hot water use facility 70 in the corresponding facility 10. For this reason, for example, in the hot water storage tank 20 of the hot water supply source, it is preferable that at least a hot water amount corresponding to the predicted hot water amount is secured.
Therefore, the state where the current hot water storage amount in the hot water storage tank 20 of the hot water supply source has decreased below the predicted use hot water amount is a state where it is not preferable to supply hot water any more. Therefore, even when the current hot water storage amount of the hot water supply source hot water storage tank 20 is equal to or less than the predicted hot water supply amount (YES in step S405), the hot water supply control unit 203 receives the hot water supply destination from the hot water supply source hot water storage tank 20. Control for stopping the hot water supply to the hot water storage tank 20 is executed (step S406).
The energy management apparatus 200 performs the control of FIG. 10 while appropriately determining the hot water storage tank 20 that is the hot water supply source and the hot water storage tank 20 that is the hot water supply destination at regular time intervals, for example. Thereby, it becomes possible to carry out interchange of hot water while controlling so that the amount of hot water stored in each hot water storage tank 20 is substantially the same as the predicted amount of hot water used.

[Modification]
Next, a modification of this embodiment will be described.
For example, there may be a situation in which a certain amount of hot water is required in a certain facility 10 that is clearly larger than the predicted amount of hot water used due to a special schedule. In such a case, for example, when the control of FIG. 10 is performed, the hot water storage tank 20 can store only the hot water of almost the same amount as the predicted hot water amount at the maximum, so that the hot water becomes insufficient.
Therefore, in a modification, for example, in a situation where there is a possibility of using a hot water volume that clearly exceeds the predicted hot water volume as described above, the user of the facility 10 sets the allowable lower limit of the hot water storage volume as the hot water supply condition. Lets you specify a value. Then, in response to the amount of hot water stored in the hot water storage tank 20 being less than the allowable lower limit value, for example, the hot water storage tank 20 in which this allowable lower limit value is specified is set as the hot water supply destination separately from the normal hot water supply at regular intervals. This is to give priority to receiving temporary hot water.

  For example, the user operates the facility energy management apparatus 100 and inputs a minimum amount of hot water as a hot water supply condition. The hot water supply conditions (information on the allowable lower limit value of the hot water storage amount) input in this way are transmitted to the energy management device 200, for example.

The hot water supply control unit 203 in the energy management device 200 stores the received hot water supply condition in association with the hot water storage tank 20 of the facility 10 including the facility energy management device 100 that is the transmission source.
In addition, the hot water supply control unit 203 determines whether or not the hot water storage amount in the hot water storage state information transmitted from the facility energy management apparatus 100 at regular intervals is less than the allowable lower limit value as the hot water supply condition stored by itself. Judge about.
When the amount of stored hot water is equal to or greater than the allowable lower limit value, it is determined that the hot water supply condition is not satisfied, and the hot water supply control unit 203 executes normal hot water supply control without particularly supplying temporary hot water. On the other hand, when the hot water storage amount is less than the allowable lower limit value, the hot water supply control unit 203 assumes that the hot water supply condition is satisfied, and sets the hot water storage tank 20 having the hot water storage amount less than the allowable lower limit value as the hot water supply destination. Execute hot water supply control. At this time, for example, the hot water supply control unit 203 removes the hot water storage tank 20 having the largest surplus hot water amount (except for the hot water storage tank 20 whose hot water storage amount is less than the allowable lower limit value) as in step S302 of FIG. It may be determined as

The flowchart of FIG. 11 shows an example of a processing procedure executed by the hot water supply control unit 203 in the modified example.
The hot water receipt control unit 203 receives hot water storage state information transmitted from the facility energy management apparatus 100 at regular intervals (step S501).
Next, the hot water supply control unit 203 compares the hot water storage amount received in step S501 with the lower limit allowable value for the hot water storage amount stored as the hot water supply condition (step S502).

  Next, the hot water supply control unit 203 determines whether or not the hot water supply condition is satisfied as a result of the comparison in step S502 (step S503). Specifically, the hot water supply control unit 203 determines whether or not the amount of hot water stored in the hot water storage state information is less than the lower limit allowable value.

When the hot water supply condition is not satisfied (step S503-NO), the hot water reception control unit 203 ends the process shown in this figure. That is, in this case, the hot water supply control unit 203 does not execute the temporary hot water reception control, but executes the normal hot water reception control shown in FIG. 8 at regular intervals, for example.
On the other hand, when the hot water supply condition is satisfied (step S503—YES), the hot water supply control unit 203 determines the hot water storage tank 20 as the hot water supply source (step S504).

  Next, when the normal hot water reception control is currently being executed, the hot water reception control unit 203 stops the normal hot water reception control (step S505). In addition, the hot water supply control unit 203 performs hot water supply control so that hot water is supplied from the hot water storage tank 20 of the hot water supply source determined in step S504, with the hot water storage tank 20 having a hot water storage amount less than the lower limit allowable value as a hot water supply destination. Execute (Step S506). The hot water supply control as step S506 may be the same as step S203 in FIG. However, in step S403 of FIG. 10, whether or not the amount of hot water stored in the hot water storage tank 20 that is the hot water supply destination is equal to or greater than the lower limit allowable value (or may be equal to or greater than a value obtained by adding a certain margin value to the lower limit allowable value). Determine whether or not.

  In this modification, the hot water supply condition may be, for example, a lower limit allowable value for hot water temperature, for example, in addition to a lower limit allowable value for hot water storage amount. The lower limit allowable value of the hot water storage rate may be used as the hot water supply condition. The hot water storage rate can be obtained by dividing the hot water storage amount in the hot water storage state information by the hot water storage capacity.

In the description with reference to FIG. 9, the hot water supply source 20 and the hot water supply destination hot water storage tank 20 are determined based on the amount of excess hot water or the amount of hot water shortage. May be determined as the hot water storage tank 20 that is the hot water supply source, and the hot water storage tank 20 that has the minimum amount of hot water stored or the hot water storage rate may be determined as the hot water storage tank 20 that is the hot water supply destination.
Further, in the description with reference to FIG. 9, an example is shown in which each one hot water supply destination hot water storage tank 20 and one hot water supply source hot water storage tank 20 are determined, but for example, the hot water supply destination hot water storage tank 20 and the hot water supply source A plurality of hot water storage tanks 20 may be determined at a time, and hot water reception may be performed between the determined hot water storage tanks 20 of the hot water supply destination and the hot water supply tank 20 of the hot water supply source.

In the description with reference to FIG. 10, the hot water supply control is performed so that the predicted hot water amount is obtained. For example, until the hot water storage amount of the hot water storage tank 20 to which the hot water is supplied becomes equal to the hot water storage capacity. You may make it supply hot water.
In the above description, the hot water supply control is performed based on the amount of stored hot water. However, for example, the hot water supply control may be performed based on the hot water temperature instead of the amount of stored hot water. In other words, for example, the hot water supply control is performed with the hot water stored in the hot water tank 20 being lowered to a certain temperature or less and the hot water supply destination being the hot water tank 20 having a certain temperature or higher. It is.
Moreover, you may make it perform hot water supply control using hot water storage amount and hot water temperature together. As an example, hot water supply control can be performed based on the amount of heat obtained by multiplying the amount of stored hot water and the temperature of hot water.

Moreover, it is not based on hot water storage amount or hot water temperature as mentioned above, For example, the combination of the hot water storage tank 20 which performs hot water supply is preset, and the hot water supply control between the hot water storage tanks 20 is controlled based on this combination. It is possible to do so.
In addition, as the power generation device, a device other than the fuel cell 30, such as a secondary battery, may be used.

  4 and 6 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by a computer system and executed to receive hot water. Control may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Energy management area 2 Commercial power supply 10 Facility 20 Hot water storage tank 30 Fuel cell 31 Water supply pipe 32 Hot water supply pipe 33 Hot water supply pipe 40 Inverter 50 Distribution board 60 Load 70 Hot water utilization equipment 80 Heat recovery pipe 81 Fuel cell piping part 100 Facility energy management Device 101 Information input unit 102 Predicted hot water volume calculation unit 103 Hot water storage state information generation unit 104 Hot water storage state information transmission unit 200 Energy management device 201 Hot water storage state information acquisition unit 202 Hot water tank determination unit 203 Hot water supply control unit 300 Hot water piping equipment

Claims (6)

A plurality of hot water tanks that are provided for each facility in the area and store hot water,
A power generation device that is provided corresponding to at least some of the facilities including the plurality of hot water storage tanks and supplies power to a load in the facility;
Heat recovery provided for a facility including the power generation device, recovering heat generated by power generation of the power generation device, and storing hot water whose temperature has been increased by the recovered heat in a hot water tank provided for the corresponding facility Equipment,
Hot water piping equipment piped so that the receipt of hot water between the plurality of hot water tanks is mutually performed;
An energy management system comprising: an energy management device that controls the hot water to be received between the plurality of hot water storage tanks via the hot water piping facility. The energy management device includes:
A hot water storage state information acquisition unit for acquiring hot water storage state information including predetermined information related to a hot water storage state of the hot water storage tank for each of the plurality of hot water storage tanks;
A hot water tank determination unit that determines a hot water supply source hot water storage tank and a hot water supply destination hot water storage tank based on the hot water storage state information;
A hot water supply control unit that executes control for supplying hot water stored in the hot water storage tank of the hot water supply source to the hot water storage tank of the hot water supply destination via the hot water piping facility. The energy management system described in.   The energy management system according to claim 2, wherein the hot water storage amount state information is information including at least a part of a hot water storage amount, a hot water temperature, a hot water storage capacity and a predicted hot water usage amount. A plurality of hot water tanks that are provided for each facility in the area and store hot water,
A power generation device that is provided corresponding to at least some of the facilities including the plurality of hot water storage tanks and supplies power to a load in the facility;
Heat recovery provided for a facility including the power generation device, recovering heat generated by power generation of the power generation device, and storing hot water whose temperature has been increased by the recovered heat in a hot water tank provided for the corresponding facility Equipment,
An energy management device provided in an energy management system comprising a hot water piping facility that is piped so that receipt of hot water is mutually performed between the plurality of hot water storage tanks,
A hot water storage state information acquisition unit for acquiring hot water storage state information having information related to the hot water storage state of the hot water storage tank for each of the plurality of hot water storage tanks;
A hot water tank determination unit that determines a hot water supply source hot water storage tank and a hot water supply destination hot water storage tank based on the hot water storage state information;
An energy management device comprising: a hot water supply control unit that executes control for supplying hot water stored in the hot water storage tank of the hot water supply source to the hot water storage tank of the hot water supply destination via the hot water piping facility . A plurality of hot water tanks that are provided for each facility in the area and store hot water,
A power generation device that is provided corresponding to at least some of the facilities including the plurality of hot water storage tanks and supplies power to a load in the facility;
Heat recovery provided for a facility including the power generation device, recovering heat generated by power generation of the power generation device, and storing hot water whose temperature has been increased by the recovered heat in a hot water tank provided for the corresponding facility Equipment,
An energy management method for an energy management device provided in an energy management system comprising a hot water piping facility that is piped so as to receive hot water between the plurality of hot water tanks,
A hot water storage state information acquisition unit acquires hot water storage state information having information related to the hot water storage state of the hot water storage tank for each of the plurality of hot water storage tanks, and
A hot water tank determination unit for determining a hot water supply source hot water tank and a hot water supply destination hot water tank based on the hot water storage state information; and
A hot water reception control step in which a hot water reception control unit executes control for supplying hot water stored in the hot water storage tank of the hot water supply source to the hot water storage tank of the hot water supply destination via the hot water piping facility An energy management method comprising: A plurality of hot water tanks that are provided for each facility in the area and store hot water,
A power generation device that is provided corresponding to at least some of the facilities including the plurality of hot water storage tanks and supplies power to a load in the facility;
Heat recovery provided for a facility including the power generation device, recovering heat generated by power generation of the power generation device, and storing hot water whose temperature has been increased by the recovered heat in a hot water tank provided for the corresponding facility Equipment,
In a computer as an energy management device provided in an energy management system including a hot water piping facility that is piped so that receipt of hot water is performed between the plurality of hot water storage tanks,
Hot water storage state information acquisition step for acquiring hot water storage state information having information related to the hot water storage state of the hot water storage tank for each of the plurality of hot water storage tanks;
A hot water tank determination step for determining a hot water supply source hot water storage tank and a hot water supply destination hot water storage tank based on the hot water storage state information;
A hot water supply control step for executing control for supplying hot water stored in the hot water storage tank of the hot water supply source to the hot water storage tank of the hot water supply destination via the hot water piping facility. program.

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