JP2020190400A - Hybrid air conditioning system - Google Patents

Abstract

To appropriately execute self-consignment while maintaining an air conditioning load.SOLUTION: A hybrid air conditioning system 1 includes: a power generation facility 18; an EHP unit 20 operated at least by the power generated at the power generation facility 18 for supplying a heat medium which is cooled or heated to an air conditioning indoor unit 12; a GHP unit 22 operated mainly by gas for supplying the heat medium which is cooled or heated to the air conditioning indoor unit 12; and an operation control part 50 for controlling the operation of the EHP unit 20 and the GHP unit 22 so as to satisfy an air conditioning load in the air conditioning indoor unit 12 by total output of the output of the EHP unit 20 and the output of the GHP unit 22. When transmitting surplus power generated at the power generation facility 18 by self-consignment through a power transmission network 38, the operation control part 50 controls an operation rate of the EHP unit 20 and the GHP unit 22 so that a power consignment amount is equal to an application value while maintaining the total output in a period of the self-consignment.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hybrid air conditioning system.

A hybrid air conditioning system that includes an EHP (electric motor heat pump) unit that operates electrically to cool or heat the heat medium and a GHP (gas heat pump) unit that operates mainly on gas to cool or heat the heat medium. There is (for example, Patent Document 1). In the hybrid air-conditioning system, for example, the operating ratio of the EHP unit and the GHP unit is controlled to the optimum ratio so that the total charge, which is the sum of the electricity charge and the gas charge, is the lowest.

Japanese Patent No. 6100180

By the way, there is a self-consignment system in which a business operator equipped with a power generation facility transmits the power generated by the power generation facility from the place where the power generation facility is installed to its own factory or the like in another place through a power grid. For self-consignment, it is necessary to apply in advance for the amount of power to be transmitted. Then, the self-consignment business operator is required to transmit the electric energy as requested at the time of self-consignment.

However, for example, if the power consumption of the load equipment at the time of self-consignment is different from the power consumption of the load equipment assumed at the time of application for self-consignment, the power consumption as requested cannot be transmitted at the time of self-consignment. There is a risk. In such a case, if you try to self-consign the amount of power as requested, you may not be able to respond appropriately to the required amount of power consumption. As a result, it may not be possible to properly meet the required air conditioning load.

In view of such a problem, an object of the present invention is to provide a hybrid air conditioning system capable of appropriately performing self-consignment while maintaining an air conditioning load.

In order to solve the above problems, the hybrid air conditioning system of the present invention includes a power generation facility and an EHP unit that operates with at least the electric power generated by the power generation facility to cool or heat the heat medium and supply it to the air conditioner indoor unit. EHP so as to satisfy the air conditioning load in the air conditioner indoor unit with the total output of the GHP unit that operates mainly with gas and cools or heats the heat medium and supplies it to the air conditioner indoor unit, and the output of the EHP unit and the output of the GHP unit. It is equipped with an operation control unit that controls the operation of the unit and the GHP unit, and the operation control unit maintains the total output during the self-consignment period when the surplus power generated by the power generation facility is self-consigned through the power transmission network. At the same time, the operating ratio between the EHP unit and the GHP unit is controlled so that the consignment amount of electric power becomes equal to the application value.

According to the present invention, it is possible to appropriately perform self-consignment while maintaining the air conditioning load.

It is a schematic diagram which shows the structure of the hybrid air-conditioning system by this embodiment. It is a figure explaining the outline of the operation map generated by the operation map generation part. It is a figure which shows an example of the operation map. It is explanatory drawing explaining the operation of the operation control part when the consignment amount is insufficient. It is explanatory drawing explaining the operation of the operation control part when the consignment amount is exceeded. It is a figure which shows an example of the operation map for self-consignment. It is a flowchart explaining the operation of the operation map generation part. It is a figure explaining the operation of the operation control unit when self-consignment is started. It is a flowchart explaining the operation flow of the operation control part.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, other specific numerical values, etc. shown in the embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

FIG. 1 is a schematic view showing the configuration of the hybrid air conditioning system 1 according to the present embodiment. In FIG. 1, the flow of the control signal is indicated by a broken line arrow. The hybrid air conditioning system 1 includes a hybrid air conditioner 10, an air conditioner indoor unit 12, a remote monitoring adapter 14, a remote monitoring server 16, and a power generation facility 18. The hybrid air conditioner 10 includes an EHP unit 20 and a GHP unit 22. In addition, EHP indicates an electric motor heat pump, and GHP indicates a gas heat pump.

The EHP unit 20, the GHP unit 22, the air conditioning indoor unit 12, the remote monitoring adapter 14, and the power generation facility 18 are provided in one office 30. Further, a power meter 32, a distribution board 34, and other electric devices 36 are also provided in the office 30. The establishment 30 is composed of low-voltage power receiving consumer units. The scope of the establishment 30 is not limited to a house or the like, but may be a building unit such as a hospital, a factory, a hotel, a leisure facility, a commercial facility, or a condominium, or a part of the building.

The power meter 32 is connected to a power transmission network 38 belonging to the power system. The watt hour meter 32 is installed at a power receiving point from the power system (transmission network 38) in the consumer (business establishment 30) and measures the received power. Further, the power meter 32 can measure not only the power received through the power transmission network 38 but also the power transmitted from the business establishment 30 to the power transmission network 38.

The distribution board 34 is connected to the power meter 32. Further, the power generation facility 18, the EHP unit 20, and other electric devices 36 are connected to the distribution board 34.

The power generation facility 18 is, for example, a renewable energy power generation facility such as a solar generator, a wind power generator, a hydraulic generator, a geothermal generator, a solar thermal generator, and an atmospheric thermal generator. The power generation facility 18 may be a fuel cell, internal-combustion power generation, storage battery, or the like.

The power generation facility 18 generates electric power, and supplies the generated electric power to the EHP unit 20 and other electric devices 36 through the distribution board 34. The EHP unit 20 and other electric devices 36 operate by consuming the supplied electric power. Further, the other electric device 36 includes an electric device other than the hybrid air conditioner 10 (EHP unit 20) in the business establishment 30, such as a lighting device. The EHP unit 20 and other electric devices 36 are load facilities that consume the electric power generated by the power generation facility 18.

The other business establishment 40 is, for example, a customer who has promised to exchange electric power with the business establishment 30, such as the company's own factory of the business establishment 30, and is located in a different place from the business establishment 30. The other business establishment 40 is composed of low-voltage power receiving consumer units. The range of the other place of business 40 may be various building units or a part of the building as well as the place of business. The other establishment 40 is connected to the power grid 38. Further, unlike the business establishment 30, the other business establishment 40 is not provided with the power generation facility 18.

As will be described later, the power generation facility 18 can transmit the generated electric power to the outside of the business establishment 30 (for example, another business establishment 40) through the power transmission network 38.

The EHP unit 20 is installed outdoors, for example. The power generated by the power generation facility 18 and the grid power (commercial power) are supplied to the EHP unit 20. The EHP unit 20 consumes the supplied electric power (operates with electricity) to cool and heat the heat medium. The heat medium cooled and heated by the EHP unit 20 is supplied to the air conditioning indoor unit 12.

The GHP unit 22 is installed outdoors, for example, and is provided independently of the EHP unit 20. The GHP unit 22 operates mainly on gas to cool and heat the heat medium. The heat medium cooled and heated by the GHP unit 22 is supplied to the air conditioning indoor unit 12. At this time, the heat medium sent from the EHP unit 20 and the heat medium sent from the GHP unit 22 are supplied to the air conditioning indoor unit 12 through the common pipe 42.

The air-conditioning indoor unit 12 exchanges heat between the heat medium supplied from the EHP unit 20 and the GHP unit 22 and the air supplied indoors, and cools or heats the air supplied indoors. The air-conditioning indoor unit 12 sends the air after the heat exchange into the room, and sends the heat medium after the heat exchange to the EHP unit 20 and the GHP unit 22.

The remote monitoring adapter 14 is installed in the vicinity of the EHP unit 20 and the GHP unit 22, for example. The remote monitoring adapter 14 includes an operation control unit 50. The operation control unit 50 is composed of a semiconductor integrated circuit including a central processing unit (CPU), a ROM in which a program or the like is stored, a RAM as a work area, and the like. The operation control unit 50 will be described in detail later.

The remote monitoring server 16 is installed by a business operator who manages the hybrid air conditioning system 1, and is installed at a location away from, for example, the EHP unit 20, the GHP unit 22, and the remote monitoring adapter 14. The remote monitoring server 16 can communicate with the remote monitoring adapter 14. Further, the remote monitoring server 16 can communicate with the electric power company 60 and the like that manage the power transmission network 38.

The remote monitoring server 16 includes an operation map generation unit 70. The operation map generation unit 70 is composed of a semiconductor integrated circuit including a central processing unit (CPU), a ROM in which a program or the like is stored, a RAM as a work area, and the like.

The operation map generation unit 70 predicts the transition of the air conditioning load and the transition of the electric power demand (building electric power demand) of the consumer on the next day from, for example, the date, the day of the week, the time, the past record of the air conditioning load, and the like. The operation map generation unit 70 generates a plurality of operation maps in which the time, the demand level (electric power demand level), the air conditioning load, the output of the EHP unit 20, and the output of the GHP unit 22 are associated with each other according to the prediction result. To do. The operation map generation unit 70 transmits the generated operation map to the remote monitoring adapter 14.

FIG. 2 is a diagram illustrating an outline of an operation map generated by the operation map generation unit 70. The operation map generation unit 70 generates a plurality of operation maps for each group. For example, the operation map generation unit 70 can generate operation maps for five groups from group GA to group GE. The number of groups on the driving map is not limited to five.

In the group 1 (for example, group GA), a set from the operation map corresponding to the demand level 0 to the operation map corresponding to the demand level 3 is generated for each time. For example, for time T10, a set SA10 of operation maps for each demand level is generated, for time T11, a set SA11 of operation maps for each demand level is generated, and for time T12, a set SA12 of operation maps for each demand level is generated. Will be generated. The demand level is associated with the magnitude of the received power (received power level) at the power receiving point from the power system in the consumer in which the EHP unit 20 or the like is installed. Such a set of driving maps is generated, for example, for 24 hours. The demand level is not limited to four levels from demand level 0 to demand level 3.

FIG. 3 is a diagram showing an example of an operation map. FIG. 3A shows an operation map at time T10 and demand level 0, FIG. 3B shows an operation map at time T10 and demand level 1, and FIG. 3C shows time. The operation map in the case of T10 and the demand level 2 is shown, and FIG. 3D shows the operation map in the case of the time T10 and the demand level 3. The operation maps of FIGS. 3 (a) to 3 (d) belong to a common group (for example, group GA). The specific numerical values are not limited to the illustrated values.

As shown in FIGS. 3A to 3D, in the operation map, the output (kW) of the EHP unit 20 and the output (kW) of the GHP unit 22 are associated with each air conditioning load (kW). .. Further, in the operation map, the total output of the output of the EHP unit 20 and the output of the GHP unit 22 is equal to the air conditioning load. That is, in the operation map, the air conditioning load is proportionally divided by the output of the EHP unit 20 and the output of the GHP unit 22, and the operation ratio of the EHP unit 20 and the GHP unit 22 is shown.

For example, as shown in FIG. 3A, in the operation map corresponding to the demand level 0 at the time T10, when the air conditioning load is 30 kW, the output of the EHP unit 20 is 20 kW and the output of the GHP unit 22 is 10 kW. There is. In this case, the operating ratio of the EHP unit 20 to the total output (air conditioning load) is about 67%, and the operating ratio of the GHP unit 22 is about 33%.

For example, as shown in FIG. 3B, in the operation map corresponding to the demand level 1 at the time T10, when the air conditioning load is 30 kW, the output of the EHP unit 20 is 15 kW and the output of the GHP unit 22 is 15 kW. There is. In this case, the operating ratio of the EHP unit 20 to the total output (air conditioning load) is about 50%, and the operating ratio of the GHP unit 22 is about 50%.

Further, as shown in FIG. 3C, in the operation map corresponding to the demand level 2 at the time T10, when the air conditioning load is 30 kW, the output of the EHP unit 20 is 12 kW and the output of the GHP unit 22 is 18 kW. There is. In this case, the operating ratio of the EHP unit 20 to the total output (air conditioning load) is 40%, and the operating ratio of the GHP unit 22 is 60%.

Further, as shown in FIG. 3D, in the operation map corresponding to the demand level 3 at the time T10, when the air conditioning load is 30 kW, the output of the EHP unit is 10 kW and the output of the GHP unit is 20 kW. In this case, the operating ratio of the EHP unit 20 to the total output (air conditioning load) is about 33%, and the operating ratio of the GHP unit 22 is about 67%.

As described above, even at the common time T10, the contents of the operation map differ depending on the demand level. Although FIG. 3 illustrates the case where the air conditioning load is 30 kW, the air conditioning load is proportionally divided by the output of the EHP unit 20 and the output of the GHP unit 22 even when the air conditioning load is smaller than 30 kW and larger than 30 kW. The output of the EHP unit 20 and the output of the GHP unit 22 are set so as to be performed.

Further, the operation map generation unit 70 is based on the predicted transition of the air conditioning load and the transition of the electric power demand, for example, for a predetermined time (for example, 24) so that the total charge including the electricity charge and the gas charge is the lowest. Generate a driving map (set of driving maps) for hours). At this time, the operation map generation unit 70 generates an operation map in which the operation ratio of the EHP unit 20 is large with respect to the GHP unit 22 at night when the electricity charge is low, and the EHP unit 20 is used in the daytime when the electricity charge is high. On the other hand, the operation map may be different depending on the time zone, such as generating an operation map in which the operation ratio of the GHP unit 22 is large.

The operation map generation unit 70 is not limited to the mode of generating the operation map so that the total charge is the cheapest, and may generate the operation map so that the carbon dioxide (CO2) emission is the smallest, for example. However, the operation map may be generated so that the input energy amount is the smallest.

Returning to FIG. 1, the remote monitoring adapter 14 receives a plurality of operation maps for a predetermined time (for example, 24 hours) generated by the operation map generation unit 70 from the remote monitoring server 16. The received operation map is temporarily stored in the memory of the operation control unit 50 or the like. The operation control unit 50 operates the EHP unit 20 and the GHP unit 22 according to the stored operation map.

Specifically, the operation control unit 50 derives the current demand level from the current power received by the consumer. The operation control unit 50 reads out an operation map corresponding to the current demand level and the current time. The operation control unit 50 refers to the read operation map, and outputs the output of the EHP unit 20 and the output of the GHP unit 22 so as to be the output of the EHP unit 20 and the output of the GHP unit 22 corresponding to the current air conditioning load. To control. That is, the operation control unit 50 normally controls (optimally controls) the EHP unit 20 and the GHP unit 22 at an optimum operation ratio.

In the hybrid air conditioning system 1, the electric power (surplus electric power) generated by the power generation facility 18 can be self-consigned. Self-consignment means that a business operator (business establishment 30) equipped with a power generation facility 18 transfers the electric power generated by the power generation facility 18 to its own factory located in another place from the place where the power generation facility 18 is installed (for example, another). It is to transmit power to the business establishment 40) through the power grid 38. In the case of self-consignment, it is necessary to apply in advance to the electric power company 60 or the like for the amount of electric power to be transmitted every 30 minutes. Then, the business operator (business establishment 30) that performs self-consignment is required to transmit the electric energy as requested at the time of self-consignment.

However, for example, if the power consumption of the load equipment at the time of self-consignment is different from the power consumption of the load equipment assumed at the time of application for self-consignment, the power consumption as requested cannot be transmitted at the time of self-consignment. There is a risk. In such a case, if you try to self-consign the amount of power as requested, you may not be able to respond appropriately to the required amount of power consumption. As a result, it may not be possible to properly meet the required air conditioning load.

Therefore, the operation control unit 50 of the hybrid air conditioning system 1 controls the operation ratio between the EHP unit 20 and the GHP unit 22 so that the consignment amount of electric power becomes equal to the application value when self-consignment is performed. At this time, the operation control unit 50 maintains the total output, which is the sum of the output of the EHP unit 20 and the output of the GHP unit 22, before and after the start timing of self-consignment and during the self-consignment period.

FIG. 4 is an explanatory diagram illustrating the operation of the operation control unit 50 when the consignment amount is insufficient. FIG. 4 (a) shows the forecast at the time of application, FIG. 4 (b) shows before the adjustment of the consignment amount at the time of self-consignment, and FIG. 4 (c) shows the post-adjustment of the consignment amount at the time of self-consignment. Shown. Further, as shown in FIGS. 4 (a) to 4 (c), the power generation capacity of the power generation facility 18 is 100 kW.

As shown in FIG. 4A, it is assumed that the air conditioning load is expected to be 20 kW at the time of self-consignment at the time of application. In this case, the total output of the output of the EHP unit 20 and the output of the GHP unit 22 is 20 kW. Then, it is expected that the output of the EHP unit 20 will be 10 kW (operation ratio 50%) and the output of the GHP unit 22 will be 10 kW (operation ratio 50%) with reference to the normal operation map to be used at the time of self-consignment. Suppose.

Further, for example, the EHP unit 20 consumes 20 kW of electric power and outputs 10 kW of heat. Further, for example, at the time of application, it is assumed that another electric device 36 is expected to consume 20 kW of electric power at the time of self-consignment. In this case, the power generation facility 18 supplies 20 kW of the generated 100 kW to the EHP unit 20 and supplies 20 kW to the other electric equipment 36. That is, the power generation facility 18 supplies a total of 40 kW of electric power to the load facility in the business establishment 30. Then, the surplus power generated by the power generation facility 18 becomes 60 kW. Therefore, the surplus power of 60 kW can be self-consigned. Therefore, it is assumed that the application value of the consignment amount is 60 kW.

However, as shown in FIG. 4B, it is assumed that the power consumption of the other electric device 36 increases to 30 kW at the time of self-consignment, contrary to expectations. In this case, the power generation facility 18 supplies a total of 50 kW of electric power to the load facility in the business establishment 30.

Then, the surplus power generated by the power generation facility 18 becomes 50 kW. That is, while the application value of the consignment amount is 60 kW, in this case, only 50 kW can be self-consigned, resulting in a shortage of 10 kW for self-consignment.

Therefore, when a shortage of power occurs during self-consignment, as shown in FIG. 4C, the operation control unit 50 reduces the power consumption of the EHP unit 20 so that the shortage power becomes 0 kW, and the power generation facility 18 Increase the surplus electricity and adjust the consignment amount.

Specifically, the total power consumption in the business establishment 30 after adjusting the consignment amount is the total power consumption (40 kW) expected at the time of application. We also want to maintain the power consumption (30 kW) of the other electrical equipment 36 during self-consignment. Therefore, the power consumption of the EHP unit 20 at the time of self-consignment is reduced from 20 kW expected at the time of application to 10 kW.

When the power consumption of the EHP unit 20 reaches 10 kW, the heat output by the EHP unit 20 decreases from 10 kW to 5 kW. Here, regarding the air-conditioning load after adjusting the consignment amount, it is desired to maintain the air-conditioning load (20 kW) before the adjustment. That is, we want to maintain the total output of the hybrid air conditioner 10 at 20 kW. Therefore, the operation control unit 50 reduces the output of the EHP unit 20 to 5 kW and increases the output of the GHP unit 22 to 25 kW.

In this way, when the consignment amount is insufficient (when the surplus power is less than the application value), the operation control unit 50 sets the operation ratio of the EHP unit 20 after the consignment amount adjustment to that before the consignment amount adjustment. Reduce. As a result, in the hybrid air conditioning system 1, it is possible to solve the shortage of the transportation amount while maintaining the air conditioning load.

FIG. 5 is an explanatory diagram illustrating the operation of the operation control unit 50 when the consignment amount is exceeded. FIG. 5 (a) shows the forecast at the time of application, FIG. 5 (b) shows before the adjustment of the consignment amount at the time of self-consignment, and FIG. 5 (c) shows the post-adjustment of the consignment amount at the time of self-consignment. Shown. Further, as shown in FIGS. 5 (a) to 5 (c), the power generation capacity of the power generation facility 18 is 100 kW.

As shown in FIG. 5A, it is assumed that the air conditioning load (total output) is expected to be 20 kW at the time of self-consignment at the time of application. Then, it is expected that the output of the EHP unit 20 will be 10 kW (operation ratio 50%) and the output of the GHP unit 22 will be 10 kW (operation ratio 50%) with reference to the normal operation map to be used at the time of self-consignment. Suppose.

Further, for example, the EHP unit 20 consumes 20 kW of electric power and outputs 10 kW of heat. Further, for example, at the time of application, it is assumed that another electric device 36 is expected to consume 20 kW of electric power at the time of self-consignment. In this case, the power generation facility 18 supplies 20 kW of the generated 100 kW to the EHP unit 20 and supplies 20 kW to the other electric equipment 36. That is, the power generation facility 18 supplies a total of 40 kW of electric power to the load facility in the business establishment 30. Then, the surplus power generated by the power generation facility 18 becomes 60 kW. Therefore, the surplus power of 60 kW can be self-consigned. Therefore, it is assumed that the application value of the consignment amount is 60 kW.

However, as shown in FIG. 5B, it is assumed that the power consumption of the other electric device 36 is reduced to 10 kW at the time of self-consignment, contrary to expectations. In this case, the power generation facility 18 supplies a total of 30 kW of electric power to the load facility in the business establishment 30.

Then, the surplus power generated by the power generation facility 18 becomes 50 kW. That is, while the application value of the consignment amount is 60 kW, in this case, 70 kW is self-consigned, and an excess power of 10 kW is generated.

Therefore, when excess power occurs during self-consignment, as shown in FIG. 5C, the operation control unit 50 increases the power consumption of the EHP unit 20 so that the excess power becomes 0 kW, and the power generation facility 18 Reduce surplus electricity and adjust the amount of transportation.

Specifically, the total power consumption in the business establishment 30 after adjusting the consignment amount is the total power consumption (40 kW) expected at the time of application. We also want to maintain the power consumption (10 kW) of the other electrical equipment 36 during self-consignment. Therefore, the power consumption of the EHP unit 20 at the time of self-consignment is increased from 20 kW expected at the time of application to 30 kW.

When the power consumption of the EHP unit 20 reaches 30 kW, the heat output by the EHP unit 20 increases from 10 kW to 15 kW. Here, regarding the air-conditioning load after adjusting the consignment amount, it is desired to maintain the air-conditioning load (20 kW) before the adjustment. That is, we want to maintain the total output of the hybrid air conditioner 10 at 20 kW. Therefore, the operation control unit 50 increases the output of the EHP unit 20 to 15 kW and reduces the output of the GHP unit 22 to 5 kW.

In this way, when the consignment amount is exceeded (when the surplus power is larger than the application value), the operation control unit 50 sets the operation ratio of the EHP unit 20 after the consignment amount adjustment to that before the consignment amount adjustment. increase. As a result, in the hybrid air conditioning system 1, it is possible to eliminate the excess of the consignment amount while maintaining the air conditioning load. In order to perform these, the hybrid air conditioning system 1 is as follows.

Here, as described above, the operation map generation unit 70 can generate a plurality of operation maps for each group. In the hybrid air conditioning system 1, one group out of a plurality of groups (for example, group GE) is used as a self-consignment group, and the other group (for example, group GA) is used as a group for optimal control.

The operation map generation unit 70 also generates an operation map for shortage and an operation map for excess when the operation map for performing the above-mentioned optimum control (operation map for optimum control) is generated. The shortage operation map is used to adjust the shortage of consignment during self-consignment. The excess operation map is used to adjust the excess transfer amount at the time of self-consignment. Hereinafter, the operation map for shortage and the operation map for excess may be collectively referred to as an operation map for self-consignment.

Specifically, the operation map generation unit 70 generates an operation map for optimum control for the group GA and an operation map for self-consignment for the group GE when the operation map is generated. In a self-consignment group (eg, Group GE), a set of shortage driving maps and excess driving maps is generated hourly. For example, in the self-consignment group, the demand level 0 and the demand level 1 are associated with the shortage operation map, and the demand level 2 and the demand level 3 are associated with the excess operation map.

FIG. 6 is a diagram showing an example of an operation map for self-consignment. FIG. 6A shows an operation map for shortage at time T10 and demand level 0, and FIG. 6B shows an operation map for shortage at time T10 and demand level 1. FIG. (C) shows an operation map for excess at time T10 and demand level 2, and FIG. 6 (d) shows an operation map for excess at time T10 and demand level 3. The specific numerical values are not limited to the illustrated values.

As shown in FIGS. 6 (a) to 6 (d), the self-consignment operation map has the output (kW) of the EHP unit 20 and the output (kW) of the GHP unit 22 as in the operation map of FIG. Is associated with each air conditioning load (kW). Further, in the operation map for self-consignment, the air conditioning load is apportioned by the output of the EHP unit 20 and the output of the GHP unit 22, and the operation ratio of the EHP unit 20 and the GHP unit 22 is shown.

On the other hand, as shown in FIGS. 6A and 6B, in the shortage operation map, at least the output of the EHP unit 20 (EHP unit) with respect to the operation map for optimum control at a common time. The operating ratio of 20) is getting smaller.

For example, as shown in FIG. 3A, in the operation map for optimum control corresponding to the demand level 0, the output of the EHP unit 20 is 10 kW when the air conditioning load is 30 kW, whereas the output of the EHP unit 20 is 10 kW, whereas FIG. ), The output of the EHP unit 20 is as small as 0 kW when the air conditioning load is 30 kW in the shortage operation map corresponding to the demand level 0. That is, in this case, the operation ratio of the EHP unit 20 to the total output (air conditioning load) in the operation map for shortage is reduced to about 0%.

Further, as shown in FIG. 3 (b), in the operation map for optimum control corresponding to the demand level 1, the output of the EHP unit 20 is 12 kW when the air conditioning load is 30 kW, whereas in FIG. 6 (b). ), In the shortage operation map corresponding to the demand level 1, the output of the EHP unit 20 is 5 kW when the air conditioning load is 30 kW, which is small. That is, in this case, the operation ratio of the EHP unit 20 to the total output (air conditioning load) in the operation map for shortage is reduced to about 17%.

Further, as shown in FIGS. 6 (c) and 6 (d), in the excess operation map, at least the output of the EHP unit 20 (of the EHP unit 20) is obtained with respect to the operation map for optimum control at a common time. The operating ratio) is increasing.

For example, as shown in FIG. 3 (c), in the operation map for optimum control corresponding to the demand level 2, the output of the EHP unit 20 is 15 kW when the air conditioning load is 30 kW, whereas the output of the EHP unit 20 is 15 kW, whereas FIG. 6 (c) ), In the excess operation map corresponding to the demand level 2, the output of the EHP unit 20 is 25 kW when the air conditioning load is 30 kW, which is large. That is, in this case, the operation ratio of the EHP unit 20 to the total output (air conditioning load) in the excess operation map has increased to about 83%.

Further, as shown in FIG. 3 (d), in the operation map for optimum control corresponding to the demand level 3, the output of the EHP unit 20 is 20 kW when the air conditioning load is 30 kW, whereas the output of the EHP unit 20 is 20 kW, whereas FIG. 6 (d). ), In the excess operation map corresponding to the demand level 3, the output of the EHP unit 20 is 30 kW when the air conditioning load is 30 kW, which is large. That is, in this case, the operation ratio of the EHP unit 20 to the total output (air conditioning load) in the excess operation map has increased to about 100%.

Note that FIG. 6 illustrates the case where the air conditioning load is 30 kW, but even when the air conditioner load is smaller than 30 kW and larger than 30 kW, the operation map for shortage shows the operation for optimum control at a common time. The operation ratio of the EHP unit 20 is small with respect to the map, and the operation ratio of the EHP unit 20 is large with respect to the operation map for optimum control at a common time in the operation map for excess.

FIG. 7 is a flowchart illustrating the operation of the operation map generation unit 70. The operation map generation unit 70 repeats the series of processes shown in FIG. 7 at predetermined time intervals (for example, every 24 hours). The operation map generation unit 70 generates in advance an operation map for self-consignment (operation map for shortage and operation map for excess) together with an operation map for optimum control regardless of the presence or absence of self-consignment (S100). Next, the operation map generation unit 70 collectively transmits the generated operation map (operation map for optimum control and operation map for self-consignment) to the remote monitoring adapter 14 (S110), and ends a series of processes. ..

The remote monitoring adapter 14 receives an operation map for self-consignment as well as an operation map for optimum control. The received self-consignment operation map is temporarily stored in the memory of the operation control unit 50 or the like, similarly to the operation map for optimum control.

FIG. 8 is a diagram illustrating the operation of the operation control unit 50 when the self-consignment is started. When the self-consignment is started, the operation control unit 50 acquires the electric energy of each predetermined time (for example, every minute) sent out of the office 30 during the self-consignment from the watt-hour meter 32. That is, the operation control unit 50 acquires the latest surplus electric energy for a predetermined time (1 minute) (hereinafter, may be referred to as a unit surplus electric energy) from the electricity meter 32 every predetermined time (every 1 minute). To do.

The operation control unit 50 accumulates the unit surplus electric energy acquired from the start of self-consignment to the present during self-consignment. Hereinafter, the accumulated unit surplus electric energy may be referred to as a partial surplus electric energy.

The operation control unit 50 derives the predicted surplus electric energy based on the elapsed time from the start of self-consignment to the present and the partial surplus electric energy. The predicted surplus electric energy is a predicted value of the surplus electric energy from the start of self-consignment to the predetermined end time (for example, 30 minutes) which is the delimiter of the self-consignment period. This predicted surplus electric energy is derived every time the unit surplus electric energy is acquired from the electricity meter 32 (every minute). FIG. 8 shows an example of the transition of the predicted surplus electric energy. Since the period of self-consignment is usually 30 minutes, in FIG. 8, the self-consignment is completed 30 minutes after the start of self-consignment. The self-consignment is not limited to the mode in which it is completed in 30 minutes, and may be continued in units of 30 minutes.

Since the power consumption of the other electric device 36 fluctuates with time, the unit surplus power amount fluctuates with time. Therefore, as shown in FIG. 8, the predicted surplus electric energy varies with time.

Here, the application value of the consignment amount is applied every 30 minutes as the electric energy for 30 minutes from the start of self-consignment. Therefore, if the application value and the predicted surplus electric energy are finally approximately equal in the period of 30 minutes, it means that the self-consignment has been performed according to the application value.

Therefore, the operation control unit 50 determines the operation map at predetermined time intervals (for example, every minute) so that the predicted surplus electric energy falls within the allowable range with respect to the application value. The permissible range is determined, for example, to ± 1 kW centered on the application value. The specific numerical value of the allowable range is not limited to this example.

Specifically, if the predicted surplus electric energy derived at predetermined time intervals (every minute) is within the permissible range, the operation control unit 50 uses the operation map for optimum control to use the EHP unit 20. And the GHP unit 22 is controlled.

Further, if the predicted surplus electric energy derived at predetermined time intervals is less than the lower limit of the allowable range, the operation control unit 50 controls the EHP unit 20 and the GHP unit 22 by using the operation map for shortage. Do. As a result, the power consumption of the EHP unit 20 is reduced and the surplus power amount can be increased as compared with the time of optimum control. As a result, it is possible to increase the predicted surplus electric energy after the next derivation timing and return it to the allowable range.

Further, if the predicted surplus electric energy derived at predetermined time exceeds the upper limit of the allowable range, the operation control unit 50 controls the EHP unit 20 and the GHP unit 22 by using the operation map for excess. Do. As a result, the power consumption of the EHP unit 20 increases and the surplus power amount can be reduced as compared with the time of optimum control. As a result, it is possible to reduce the predicted surplus electric energy after the next derivation timing and return it to the allowable range.

In this way, the operation control unit 50 switches the type of operation map to be used according to the predicted surplus electric energy derived at predetermined time intervals (every minute). As a result, in the hybrid air conditioning system 1, the predicted surplus electric energy can be finally made approximately equal to the application value.

Further, when the operation control unit 50 switches from the operation map for optimum control to the operation map for self-consignment, or switches from the operation map for self-consignment to the operation map for optimum control, the operation is performed. The operation map after switching (current operation map) may be maintained regardless of the predicted surplus power amount until a predetermined time (for example, 3 minutes or the like) elapses after the map is switched. In this aspect, it is possible to suppress frequent switching of the operation map. As a result, it is possible to suppress a large change in the output of the EHP unit 20 and the output of the GHP unit 22 in a short time, and it is possible to stabilize the hybrid air conditioner 10.

FIG. 9 is a flowchart illustrating an operation flow of the operation control unit 50. When the operation control unit 50 receives the operation map from the remote monitoring server 16, the operation control unit 50 stores the received operation map (operation map for optimum control and operation map for self-consignment) in the memory (S200).

Next, the operation control unit 50 determines whether or not there has been an instruction to start self-consignment (S210). When there is no instruction to start self-consignment (NO in S210), the operation control unit 50 reads out the operation map for optimum control, and sets the EHP unit 20 and the GHP unit 22 according to the operation map for optimum control. Control (S220). Specifically, the operation control unit 50 reads out the optimum control operation map to be used according to the current demand level and the current time from the plurality of optimum control operation maps, and the read operation. The EHP unit 20 and the GHP unit 22 are operated at the operation ratios shown on the map.

Next, the operation control unit 50 determines whether or not the control end time has come (S230). When the control end time is reached (YES in S230), the operation control unit 50 ends a series of processes. If the control end time has not been reached (NO in S230), the operation control unit 50 returns to the process of step S210. That is, the operation control unit 50 determines whether or not there has been an instruction to start self-consignment (S210) and controls the operation map for optimum control (S220) at predetermined time intervals (for example, 1) until the control end time is reached. Repeat every minute).

When there is an instruction to start self-consignment (YES in S210), the operation control unit 50 acquires the application value applied to the electric power company 60 from the remote monitoring server 16 (S240). Next, the operation control unit 50 derives an allowable range based on the application value (S250).

Next, the operation control unit 50 acquires the latest unit surplus electric energy for one minute from the electric power meter 32 (S260). Next, the operation control unit 50 derives the partial surplus electric energy by accumulating the unit surplus electric energy acquired from the start of self-consignment to the present (S270). Next, the operation control unit 50 derives the predicted surplus electric energy 30 minutes after the start of self-consignment based on the elapsed time from the start of self-consignment to the present and the partial surplus electric energy (S280).

Next, a predetermined time has elapsed since the operation control unit 50 switched from the operation map for optimum control to the operation map for self-consignment, or after switching from the operation map for self-consignment to the operation map for optimum control. It is determined whether or not it has been done (S290). When the predetermined time has not passed since the operation map was switched (NO in S290), the operation control unit 50 uses the current type of operation map (operation map for optimum control or operation map for self-consignment) to EHP. The unit 20 and the GHP unit 22 are controlled (S300), and the process proceeds to step S360.

When a predetermined time has elapsed from the switching of the operation map (YES in S290), the operation control unit 50 determines whether or not the predicted surplus electric energy is within the permissible range (S310). When the predicted surplus electric energy is within the permissible range (YES in S310), the operation control unit 50 controls the EHP unit 20 and the GHP unit 22 using the operation map for optimum control (S320), and processes in step S360. Proceed to.

If the predicted surplus electric energy is not within the permissible range (NO in S310), the operation control unit 50 determines whether or not the predicted surplus electric energy is below the lower limit of the permissible range (S330).

When the predicted surplus electric energy is below the lower limit of the permissible range (YES in S330), the operation control unit 50 reads out the operation map for shortage among the operation maps for self-consignment, and conforms to the operation map for shortage. Then, the EHP unit 20 and the GHP unit 22 are controlled (S340), and the process proceeds to step S360.

If the operation control unit 50 has a plurality of operation maps for shortage (for example, if there is an operation map for shortage for demand level 0 and an operation map for shortage corresponding to demand level 1), the operation control unit 50 is currently present. The operation map for the shortage of 1 may be selected according to the predicted surplus electric energy and the like.

If the predicted surplus electric energy is not below the lower limit of the allowable range (NO in S330), it is considered that the predicted surplus electric energy is above the upper limit of the allowable range, and the operation control unit 50 is included in the operation map for self-consignment. The operation map for excess is read out, the EHP unit 20 and the GHP unit 22 are controlled according to the operation map for excess (S350), and the process proceeds to step S360.

If the operation control unit 50 has a plurality of excess operation maps (for example, if there is an excess operation map for demand level 2 and an excess operation map corresponding to demand level 3), the operation control unit 50 is currently present. The operation map for excess 1 may be selected according to the predicted surplus electric energy and the like.

In step S360, the operation control unit 50 determines whether or not it is the end time of self-consignment (S360). For example, the operation control unit 50 determines that the self-consignment has ended when 30 minutes have passed from the start of the self-consignment.

If it is not the end time of self-consignment (NO in S360), the operation control unit 50 returns to the process of step S260 and acquires the latest unit surplus electric energy for one minute from the watt-hour meter 32 (S260). That is, the operation control unit 50 sequentially derives and updates the predicted surplus electric energy for 30 minutes from the start of self-consignment, and sequentially determines the operation map to be used so that the predicted surplus electric energy falls within the permissible range. ..

When the end time of self-consignment is reached (YES in S360), the operation control unit 50 returns to the process of step S210 and determines whether or not self-consignment has been started (S210).

The self-consignment is usually carried out for 30 minutes, but may be continued in units of 30 minutes beyond 30 minutes. For example, when self-consignment is carried out for one hour, the consignment amount is applied for each of the first 30 minutes and the latter 30 minutes. Therefore, the operation control unit 50 may repeat the process after step S240 again when the self-consignment is continued for more than 30 minutes.

As described above, in the hybrid air conditioning system 1 of the present embodiment, the power transfer amount is equal to the application value while maintaining the total output of the output of the EHP unit 20 and the output of the GHP unit 22 during the self-consignment period. The operating ratio between the EHP unit 20 and the GHP unit 22 is controlled so as to be.

As a result, in the hybrid air conditioning system 1 of the present embodiment, the power consumed by the EHP unit 20 among the power generated by the power generation facility 18 changes while the air conditioning load is maintained, and the surplus power changes. As a result, in the hybrid air-conditioning system 1 of the present embodiment, self-consignment can be performed with the consignment amount according to the application value while the air-conditioning load is maintained.

Therefore, according to the hybrid air conditioning system 1 of the present embodiment, it is possible to appropriately perform self-consignment while maintaining the air conditioning load.

In the hybrid air-conditioning system 1 of the present embodiment, the optimum control may be temporarily interrupted by supporting self-consignment. However, since the business operator who introduces the hybrid air conditioning system 1 can fulfill the responsibility to the electric power company and the like, even if the optimum control is temporarily interrupted, sufficient social credibility can be obtained.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such embodiments. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

For example, in the above embodiment, the remote monitoring adapter 14 is provided with the operation control unit 50. However, the operation control unit 50 is not limited to the mode provided in the remote monitoring adapter 14, and may be provided in, for example, the remote monitoring server 16.

Further, in the above embodiment, an operation map for self-consignment is generated in advance regardless of the presence or absence of self-consignment. However, the operation map generation unit 70 may generate an operation map for self-consignment and transmit it to the remote monitoring adapter 14 immediately before the self-consignment is performed. In this case, the operation map for self-consignment may be transmitted to the remote monitoring adapter 14 together with the operation map for optimum control, or may be transmitted to the remote monitoring adapter 14 separately from the operation map for optimum control. You may.

Further, in the hybrid air conditioning system 1 of the above embodiment, the hybrid air conditioner 10 may be an all-in-one type in which the EHP unit 20 and the GHP unit 22 are built in the same housing, or the EHP unit 20. And the GHP unit 22 may be a pair multi-type in which they are configured in separate housings and are connected by a pipe 42. That is, the hybrid air conditioner 10 may have the functions of the EHP unit 20 and the functions of the GHP unit 22.

The present invention can be used in a hybrid air conditioning system.

1 Hybrid air conditioning system 12 Air conditioning indoor unit 18 Power generation equipment 20 EHP unit 22 GHP unit 38 Power grid 50 Operation control unit

Claims (1)

Power generation equipment and
An EHP unit that operates with at least the electric power generated by the power generation facility, cools or heats the heat medium, and supplies it to the air conditioning indoor unit.
A GHP unit that operates mainly with gas, cools or heats the heat medium, and supplies it to the air conditioning indoor unit.
An operation control unit that controls the operation of the EHP unit and the GHP unit so that the total output of the output of the EHP unit and the output of the GHP unit satisfies the air conditioning load in the air conditioning indoor unit.
With
When the operation control unit self-consigns the surplus power generated by the power generation facility through the power grid, the consignment amount of power becomes equal to the application value while maintaining the total output during the self-consignment period. A hybrid air conditioning system that controls the operating ratio between the EHP unit and the GHP unit.

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