JP2022064235A - Heat storage type temperature difference storage battery, combined heat and power system, and combined heat and power system group - Google Patents

Abstract

To provide a heat storage type temperature difference storage battery, which is a novel type battery that generates electricity by using heat media having different temperatures stored in a heat pump cycle.SOLUTION: A heat storage type temperature difference storage battery includes a compressor for compressing a heat medium, a first flow path connected to the compressor, an accumulation heat insulation high temperature storage tank connected to the first flow path, a second flow path connected to the accumulation heat insulation high temperature storage tank, an expansion device provided in the second flow path and configured to reduce the pressure of the heat medium flowing through the second flow path, an accumulation heat insulation low temperature storage tank provided on the upstream side or the downstream side of the expansion device in the second flow path for storing the heat medium of the second flow path, a third flow path connected to the downstream side of the second flow path and configured to supply a heat medium through each of the expansion device and the accumulation high insulation low temperature storage tank to the compressor, and a temperature difference generator configured to generate electricity by using the temperature difference between the heat medium flowing on the upstream side of an expansion turbine in the second flow path and the heat medium flowing through the third flow path.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a heat storage type temperature difference storage battery, a combined heat and power system, and a group of combined heat and power systems.

Conventionally, in Japan, an energy supply system that supplies electric power from a large-scale centralized power plant such as a nuclear power plant has been adopted. On the other hand, in recent years, from the viewpoint of stable energy supply and energy saving, a distributed energy supply system that supplies energy by installing relatively small-scale energy conversion equipment near the energy consuming area has attracted attention. There is.

Patent Document 1 describes a regional combined heat and power system, which is a form of a distributed energy supply system. In the regional heat and power combined supply system described in Patent Document 1, at least a compressor and a heat radiating device are provided on the side that supplies the heat medium, and a heat exchanger is provided on the side of the consumer to which the heat medium is supplied (plural demands in the target area). A large-scale heat pump cycle is constructed for a plurality of consumers in the target area by forming a flow path of the heat medium between the side that supplies the heat medium and the side that supplies the heat medium. As a result, it is possible to efficiently meet the demand for air conditioning and hot water supply in the target area with a small amount of input energy.

In this configuration, at least the compressor and the radiator are provided in the common flow path of the heat medium as shared equipment for a plurality of demand bodies, so that these facilities are installed on each demand body side as compared with the case where these facilities are installed on each demand body side. The equipment configuration can be simplified. This makes it possible to reduce or eliminate the problems of the installation space and noise of the equipment for combined heat and power on each consumer side.

Japanese Unexamined Patent Publication No. 2016-61190

The present disclosure discloses a heat storage type temperature difference storage battery which is a novel type battery that generates electricity by using heat media having different temperatures stored in a heat pump cycle, a combined heat and power system equipped with the battery, and mutual exchange of heat and power. The purpose is to provide a group of combined heat and power systems.

In order to achieve the above object, the heat storage type temperature difference storage battery according to at least one embodiment of the present disclosure is
A compressor for compressing the heat medium,
A first flow path connected to a compressor and for flowing the heat medium compressed by the compressor,
A pressure-accumulation adiabatic high-temperature storage tank connected to the first flow path and for storing the heat medium supplied from the first flow path,
A second flow path connected to the accumulator adiabatic high temperature storage tank and for flowing the heat medium leaving the accumulator adiabatic high temperature storage tank.
An expansion device provided in the second flow path and configured to reduce the pressure of the heat medium flowing through the second flow path.
A pressure-accumulation adiabatic low-temperature storage tank provided on the upstream side or the downstream side of the expansion device in the second flow path and for storing the heat medium of the second flow path.
A third flow path connected to the downstream side of the second flow path and configured to supply the heat medium through each of the expansion device and the accumulator adiabatic low temperature storage tank to the compressor.
A temperature difference generator configured to generate electricity by utilizing the temperature difference between the heat medium flowing on the upstream side of the expansion device in the second flow path and the heat medium flowing through the third flow path.
To prepare for.

In order to achieve the above object, the combined heat and power system according to at least one embodiment of the present disclosure may be used.
With the above heat storage type temperature difference storage battery,
A fourth flow path connected to the accumulator adiabatic high temperature storage tank and configured to supply the heat medium from the accumulator adiabatic high temperature storage tank to the demand body of the target site.
To prepare for.

In order to achieve the above object, the combined heat and power system group according to at least one embodiment of the present disclosure is
A group of combined heat and power systems equipped with the above-mentioned combined heat and power systems.
The plurality of combined heat and power systems are provided corresponding to each of a plurality of target sites.
The combined heat and power system group further includes a centralized heat and power supply and demand system configured to optimize the supply and demand of electric power and heat in the entire plurality of combined heat and power systems.

According to the present disclosure, a heat storage type temperature difference storage battery, which is a novel type battery that generates electricity by using heat media having different temperatures stored in a heat pump cycle, and a combined heat and power system and a group of combined heat and power systems equipped with the battery are included. Provided.

It is a schematic diagram which shows the schematic structure of the regional combined heat and power system 2 (2A) which concerns on one Embodiment. It is a schematic diagram which shows the schematic structure of the regional combined heat and power system group 4. It is a schematic diagram which shows the schematic structure of the regional combined heat and power system 2 (2B) which concerns on one Embodiment. FIG. 3 is a schematic diagram showing a circulation flow path 74 and a circulation flow path 76 in the regional combined heat and power system 2 (2B) shown in FIG. 3 with thick lines. It is a schematic diagram which shows the schematic structure of the regional combined heat and power system 2 (2C) which concerns on one Embodiment. It is a schematic diagram which shows the modification of the regional combined heat and power system 2 (2B).

Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the invention, but are merely explanatory examples. ..
For example, expressions that represent relative or absolute arrangements such as "in one direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" are exact. Not only does it represent such an arrangement, but it also represents a tolerance or a state of relative displacement at an angle or distance to the extent that the same function can be obtained.
For example, expressions such as "same", "equal", and "homogeneous" that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
For example, the expression representing a shape such as a quadrangular shape or a cylindrical shape not only represents a shape such as a quadrangular shape or a cylindrical shape in a geometrically strict sense, but also an uneven portion or a chamfer within the range where the same effect can be obtained. It shall also represent the shape including the part and the like.
On the other hand, the expressions "equipped", "equipped", "equipped", "included", or "have" one component are not exclusive expressions excluding the existence of other components.

(Outline configuration of regional combined heat and power system)
FIG. 1 is a schematic diagram showing a schematic configuration of a regional combined heat and power system 2 (2A) according to an embodiment.
The district heat and power cogeneration system 2 shown in FIG. 1 is a system constructed so as to be feasible in parallel with power generation and heat supply to the demand body 100 at the target site. The scale of the target site may be, for example, an area having a diameter of about 300 to 500 m, and may be wider or narrower than that. The demand body 100 includes at least one of various facilities such as a detached house, an apartment house such as an apartment, a shopping facility, a factory and a hospital.

As shown in FIG. 1, the regional combined heat and power supply system 2 includes an electric motor 5, a compressor 6, a first flow path 8, a pressure-accumulation heat insulation high-temperature storage tank 10, a second flow path 12, an expansion turbine 14 (expansion device), and a pressure-accumulation heat insulation. Low temperature storage tank 18, 3rd flow path 20, temperature difference generator 22, 4th flow path 24, 5th flow path 26, 6th flow path 28, 7th flow path 30, transmission lines 32 to 38, and site thermoelectric supply and demand system. 50, a temperature sensor 82, a temperature sensor 84, and a motor control unit 86 are provided. In FIG. 1, heat and electric power transfer paths are shown by solid lines and alternate long and short dash lines, respectively.

The electric motor 5 is connected to the compressor 6 and drives the compressor 6 using the electric power supplied from the site thermoelectric supply and demand system 50 via the power transmission line 32. The electric power supplied from the site thermoelectric supply and demand system 50 to the electric motor 5 may be system electric power, electric power supplied from the temperature difference generator 22, and described later connected to the expansion turbine 14. It may be electric power supplied from various electric facilities such as an EV, a NAS battery, and sunlight installed in the demand body 100 through the generator of the above and the transmission line 36. When system power is used as power supplied from the site thermoelectric supply and demand system 50 to the electric motor 5, it is desirable to use inexpensive nighttime power.

The compressor 6 is driven by an electric motor 5 to compress a medium-temperature low-pressure heat medium supplied from the third flow path 20 to generate a high-temperature and high-pressure heat medium. In another embodiment, the compressor 6 may be driven directly (without being converted into electric power) by a wind turbine, a water turbine, or the like instead of the electric motor 5. The heat medium supplied to the compressor 6 from the third flow path 20 is not particularly limited as long as it is a heat medium that can be used in the heat pump cycle, and for example, CO ₂ , ammonia, propane, butane, alternative CFCs, or the like is used. be able to. In this specification, the expressions high temperature, medium temperature, and low temperature are used as relative temperatures in order from the highest temperature. In addition, as relative pressure, the expressions high pressure, medium pressure, and low pressure are used in order from the one with the highest pressure.

The first flow path 8 is connected to the downstream side of the compressor 6 and is configured to flow a high-temperature and high-pressure heat medium compressed by the compressor 6.

The accumulator heat insulating high temperature storage tank 10 is connected to the downstream side of the first flow path 8 and is configured to store a high temperature and high pressure heat medium supplied from the first flow path 8.

The second flow path 12 is connected to the downstream side of the accumulator adiabatic high temperature storage tank 10, and the heat medium leaving the accumulator adiabatic high temperature storage tank 10 is transferred to the high temperature side of the temperature difference generator 22, the expansion turbine 14, and the accumulator adiabatic low temperature storage tank 18. It is configured to supply to. In some embodiments, a part of the high-temperature and high-pressure heat medium stored in the accumulator-insulated high-temperature storage tank 10 is described later in accordance with a command from the site thermoelectric power supply / supply system 50 based on the heat / power demand and consumption of the demand body 100. It is supplied to the demand body 100 by the fourth flow path 24 of the above, and a part of it is introduced to the high temperature side of the temperature difference generator 22 by the second flow path 12, and power is generated by the temperature difference from the low temperature side of the temperature difference generator 22. Then, electric power may be supplied to the demand body 100 via the power transmission line 34 and the power transmission line 35. The heat medium flowing through the second flow path 12 dissipates heat on the high temperature side of the temperature difference generator 22 to reduce the temperature. In one embodiment, the high temperature side of the temperature difference generator 22 functions as a condenser.

The expansion turbine 14 is provided on the downstream side of the temperature difference generator 22 in the second flow path 12, and works on a medium-temperature high-pressure heat medium (the high-temperature side of the temperature difference generator 22) flowing through the second flow path 12. It is configured to reduce the pressure of the later medium-temperature and high-pressure heat medium). In the example shown in FIG. 1, the expansion turbine 14 is driven by a medium-temperature high-pressure heat medium flowing through the second flow path 12, and a generator (not shown) connected to the expansion turbine 14 generates power. The electric power obtained from the generator connected to the expansion turbine 14 is transmitted to the site thermoelectric supply and demand system 50 via the transmission line 33.

The accumulator adiabatic low-temperature storage tank 18 is provided on the downstream side of the expansion turbine 14 in the second flow path 12, and is configured to store the low-temperature low-pressure heat medium of the second flow path 12.

The third flow path 20 is connected to the downstream side of the second flow path 12, and compresses the heat medium that has passed through each of the expansion turbine 14 and the accumulator adiabatic low temperature storage tank 18 via the low temperature side of the temperature difference generator 22. It is configured to supply to the machine 6. In some embodiments, a part of the low-temperature low-pressure heat medium stored in the accumulator-insulated low-temperature storage tank 18 is described later in accordance with a command from the site thermoelectric power supply / supply system 50 based on the demand and consumption of cold heat / electric power of the demand body 100. It is supplied to the demand body 100 by the sixth flow path 28 of the above, and a part of it is introduced to the low temperature side of the temperature difference generator 22 by the third flow path 20, and power is generated by the temperature difference from the high temperature side of the temperature difference generator 22. Then, electric power may be supplied to the demand body 100 via the power transmission line 34 and the power transmission line 35.

The temperature difference generator 22 includes a Zeebeck element (thermoelectric element), and has a high temperature and high pressure heat medium flowing upstream of the expansion turbine 14 in the second flow path 12 and a low temperature and low pressure heat medium flowing through the third flow path 20. It is configured to generate electricity by the Zeebeck effect using the temperature difference. The electric power generated by the temperature difference generator 22 is supplied to the site thermoelectric supply and demand system 50 via the transmission line 34. The heat medium flowing through the third flow path 20 absorbs heat on the low temperature side of the temperature difference generator 22 and heats it. In one embodiment, the low temperature side of the temperature difference generator 22 functions as an evaporator. The medium-temperature and low-pressure heat medium after working in the temperature difference generator 22 in the third flow path 20 is returned to the compressor 6 and compressed again by the compressor 6 to become a high-temperature and high-pressure heat medium.

The fourth flow path 24 is connected to the downstream side of the accumulator adiabatic high temperature storage tank 10, and supplies a high temperature and high pressure heat medium from the accumulator adiabatic high temperature storage tank 10 to the demand body 100 of the target site of the regional heat and power cogeneration system 2 (heat supply). ) Is configured to. This heat may be stored again as heat in the form of hot water or the like in the hot water storage tank provided in the demand body 100.

The fifth flow path 26 is supplied to the demand body 100 via the fourth flow path 24 so as to recover the medium-temperature high-pressure heat medium whose temperature has dropped by performing work on the demand body 100 side from the demand body 100. It is configured. The fifth flow path 26 is connected to a position between the temperature difference generator 22 and the expansion turbine 14 in the second flow path 12, and the medium-temperature high-pressure heat medium recovered from the demand body 100 is transferred to the second flow path 12. It is configured to supply to the position between the temperature difference generator 22 and the expansion turbine 14 in the above.

The sixth flow path 28 is connected to the downstream side of the accumulator adiabatic low temperature storage tank 18, and supplies a low-temperature low-pressure heat medium leaving the accumulator adiabatic low-temperature storage tank 18 from the accumulator adiabatic low-temperature storage tank 18 to the demand body 100 (cold heat supply). It is configured to do. When supplying a lower temperature heat medium, the sixth flow path 28 is connected to the downstream side of the expansion turbine 14, and the lower temperature heat medium after passing through the expansion turbine 14 is supplied to the demand body 100. It may be configured to do so.

The seventh flow path 30 is configured to recover the low-temperature low-pressure heat medium supplied to the demand body 100 via the sixth flow path 28 from the demand body 100. The seventh flow path 30 is connected to a position between the temperature difference generator 22 and the compressor 6 in the third flow path 20, and the low-temperature low-pressure heat medium recovered from the demand body 100 is transferred to the third flow path 20. It is configured to supply to the position between the temperature difference generator 22 and the compressor 6 in the above.

The site thermoelectric supply and demand system 50 transmits electric power for driving the electric motor 5 to the electric motor 5 via a transmission line 32 by direct current power. The site thermoelectric supply and demand system 50 receives power generated by a generator (not shown) connected to the expansion turbine 14 as DC power via a power transmission line 33, and receives power generated by a temperature difference generator 22 through a power transmission line 34. Receives power via DC power.

The site thermoelectric supply and demand system 50 transfers the DC power received from the generator connected to the expansion turbine 14 via the power transmission line 33 and the DC power received from the temperature difference generator 22 via the power transmission line 34. It is configured to be able to supply to the demand body 100 of the target site via 35. The site thermoelectric supply and demand system 50 is a power generated on the demand side of the target site (for example, a solar power generation facility installed at the target site, a fuel cell, a NAS battery, and a lithium ion battery installed in an electric vehicle used at the target site. (Electricity output from the above, etc.) can be received by DC power via the transmission line 36.

The site thermoelectric power supply / supply system 50 is configured to be able to supply DC power to the centralized thermoelectric power supply / supply system 52 via the power transmission line 37, and is configured to be able to receive DC power from the centralized thermoelectric power supply / supply system 52 via the power transmission line 38. ing.

As shown in FIG. 2, the integrated heat and power supply and demand system 52 is configured to optimize the supply and demand of electric power and heat in the entire plurality of regional heat and power combined supply systems 2. The integrated heat and power supply and demand system 52 and the site heat and power supply and demand system 50 are configured to be able to exchange DC power, and DC power, high temperature and high voltage heat medium, and low temperature and low voltage heat medium can be exchanged between the regional heat and power combined supply system 2. It is configured. In FIG. 2, a plurality of regional cogeneration systems 2 are provided corresponding to a plurality of target sites, and a plurality of regional cogeneration systems 2 and a centralized heat and power supply and demand system 52 are combined with a regional heat and power supply system group 4. To configure.

The temperature sensor 82 is provided in the accumulator adiabatic high temperature storage tank 10 and is configured to be able to detect the temperature of the heat medium stored in the accumulator adiabatic high temperature storage tank 10. The temperature sensor 84 is provided in the accumulator adiabatic low temperature storage tank 18 and is configured to be able to detect the temperature of the heat medium stored in the accumulator adiabatic low temperature storage tank 18.

When the output of the temperature sensor 82 is equal to or less than the threshold value, the motor control unit 86 drives the electric motor 5 to operate the compressor 6 to replenish the accumulator heat insulating high temperature storage tank 10 with a high temperature and high pressure heat medium. It may be configured in. Further, the accumulator heat insulating high temperature storage tank 10 may be provided with a residual quantity sensor (capacity sensor) capable of detecting the remaining amount of the heat medium stored in the accumulator heat insulating high temperature storage tank 10. When the remaining amount sensor is provided, the motor control unit 86 sets the electric motor 5 when the remaining amount of the heat medium of the accumulator heat insulating high temperature storage tank 10 detected by the remaining amount sensor falls below the threshold value. By driving and operating the compressor 6, the accumulator heat insulating high temperature storage tank 10 may be configured to be replenished with a high temperature and high pressure heat medium.

Further, when the output of the temperature sensor 84 is equal to or higher than the threshold value, the motor control unit 86 replenishes the accumulator heat insulating high temperature storage tank 10 with a high temperature and high pressure heat medium by driving the electric motor 5 to operate the compressor 6. At the same time, a high-temperature and high-pressure heat medium may be discharged from the accumulator-insulated high-temperature storage tank 10 to the second flow path 12, and power may be generated by the temperature difference generator 22. Further, the accumulator adiabatic low temperature storage tank 18 may be provided with a residual amount sensor (capacity sensor) capable of detecting the remaining amount of the heat medium stored in the accumulator adiabatic low temperature storage tank 18. When the remaining amount sensor is provided, the motor control unit 86 transfers the electric motor 5 when the remaining amount of the heat medium of the accumulator adiabatic low temperature storage tank 18 detected by the remaining amount sensor falls below the threshold value. By driving the compressor 6 to operate the compressor 6, a high-temperature and high-pressure heat medium is replenished in the accumulator-insulated high-temperature storage tank 10, and the high-temperature and high-pressure heat medium is discharged from the accumulator-insulated high-temperature storage tank 10 to the second flow path 12, and the temperature is increased. The difference generator 22 may generate electricity.

At this time, instead of simply radiating heat on the high temperature side of the temperature difference generator 22, the temperature is increased by supplying a low temperature and low pressure heat medium from the accumulator heat insulating low temperature storage tank 18 to the temperature difference generator 22 via the third flow path 20. The difference generator 22 generates electricity to recover the energy. Then, the medium-temperature and high-pressure heat medium after being used for power generation on the high temperature side of the temperature difference generator 22 in the second flow path 12 is supplied to the expansion turbine 14 to drive the expansion turbine 14 and connect to the expansion turbine 14. A generator (not shown) is performed. The heat medium that has passed through the expansion turbine 14 and has become low temperature and low pressure is replenished in the accumulator adiabatic low temperature storage tank 18.

According to the configuration shown in FIG. 1, the compressor 6, the first flow path 8, the accumulator adiabatic high temperature storage tank 10, the second flow path 12, the expansion turbine 14, the accumulator adiabatic low temperature storage tank 18, the third flow path 20, and the temperature difference. A heat pump cycle can be constructed by the circulation flow path 25 of the heat medium configured by the generator 22. A heat pump usually has a COP of more than 3 (= 300%), and is extremely efficient because the efficiency is improved by several hundred percent as compared with a hot water supply using a combustion type device having an efficiency of about 90%. Therefore, it is possible to efficiently generate a high-temperature high-pressure heat medium and a low-temperature low-pressure heat medium with a small amount of input energy.

Further, by storing the generated high-temperature and high-pressure heat medium and the low-temperature and low-pressure heat medium in the pressure-accumulation heat-insulating high-temperature storage tank 10 and the pressure-accumulation heat-insulating low-temperature storage tank 18, electric power is stored as heat, and the pressure-accumulation heat-insulating high-temperature storage tank is used according to the power demand. Since the heat medium of high temperature and high pressure, the heat medium of low temperature and low pressure, and the temperature difference generator 22 can be supplied from 10 and the heat storage adiabatic low temperature storage tank 18 to generate power, heat media having different temperatures stored in the heat pump cycle can be used. It is possible to provide a heat storage type temperature difference storage battery 3 which is a novel type battery that is used to generate power. In the configuration shown in FIG. 1, the compressor 6, the first flow path 8, the accumulator adiabatic high temperature storage tank 10, the second flow path 12, the expansion turbine 14, the accumulator adiabatic low temperature storage tank 18, the third flow path 20, and the temperature difference generator 22. Consists of the heat storage type temperature difference storage battery 3.

According to this heat storage type temperature difference storage battery 3, for example, the configuration described in Patent Document 1 (a configuration in which an expansion turbine is driven by a high-temperature and high-pressure heat medium flowing through a heat pump cycle and power is generated by a generator connected to the expansion turbine. ), It is possible to generate electricity with a simple configuration by using the heat medium in the heat pump cycle.

In addition, the heat medium generated by the heat pump cycle of the district heating and power system 2 has a temperature sufficient for general life (for example, about -30 ° C to 60 ° C) including hot water supply, heating, cooling, and ice temperature storage. Since it can be supplied to the demand body 100, it can be used as a heat supply source for the region.
Especially in areas where infrastructure is concentrated, such as compact cities and smart cities, more efficient operation is possible without being restricted by the distance traveled by heat.

It is possible to realize a distributed energy supply system that supplies energy by installing a relatively small-scale energy conversion device such as a compressor 6 and a temperature difference generator 22 in a place close to an energy consuming area. There are also merits in terms of stable supply and energy saving.

In general, there is a large demand for cold heat in summer and a large demand for heat in winter. Some homes use a lot of heat, while others are absent during the day and don't use much heat. The amount of heat demand fluctuates due to various factors such as the environment and lifestyle, but it is not desirable from the viewpoint of energy saving to release excess heat to the atmosphere as a result of the fluctuation. Like heat, electricity fluctuates greatly on a consumer-by-consumer basis, but it can be leveled by managing multiple consumers together. The regional combined heat and power system 2 stores surplus heat / electricity in a thermal state as a buffer for fluctuations in the amount of heat and electricity demand and the amount of power generation of renewable energy, and a temperature difference generator 22 is used as needed. It can be used to take out electricity.

Further, for example, NAS batteries and lithium-ion batteries tend to increase in cost by increasing lithium and sulfur in order to increase the storage capacity, but in this heat storage type temperature difference storage battery 3, the pressure storage heat insulation high temperature storage tank 10 and the pressure storage are stored. The storage capacity can be easily increased by newly installing or adding a heat insulating low temperature storage tank 18.

Further, since the temperature difference generator 22 (thermoelectric element) has no moving part, it has a long life and high reliability, and vibration and noise do not occur. The temperature difference generator 22 (thermoelectric element) can freely design the shape of the element. The amount of power generated per unit area of the temperature difference generator 22 is several to several tens of times that of solar power generation. Since most of the materials used in the temperature difference generator 22 are metals or semiconductors, the temperature difference generator 22 may be oxidatively deteriorated in a high temperature environment, oxygen, steam, etc., but from the viewpoint of suppressing this oxidative deterioration, the regional heat and power cogeneration system 2 is used. It is desirable that the heat medium used is alternative chlorophylls.

Further, in the temperature difference generator 22, when the amount of heat held by the heat medium stored in the accumulator adiabatic high temperature storage tank 10 and the amount of cold heat held by the heat medium stored in the accumulator adiabatic low temperature storage tank 18 are not balanced, the temperature difference Power generation by the generator 22 cannot be performed efficiently.

In this regard, according to the regional heat and power combined supply system 2 provided with the temperature sensor 82 and the motor control unit 86, when the output of the temperature sensor 82 provided in the accumulator adiabatic high temperature storage tank 10 is equal to or less than the threshold value, the electric motor 5 is used as a compressor. 6 can be driven to replenish the amount of heat held by the heat medium stored in the accumulator adiabatic high temperature storage tank 10 (the temperature of the heat medium stored in the accumulator adiabatic high temperature storage tank 10 is raised), so that temperature difference power generation can be performed. The machine 22 can efficiently generate electricity.

Further, according to the regional heat and power combined supply system 2 provided with the temperature sensor 84 and the motor control unit 86, when the output of the temperature sensor 84 provided in the accumulator adiabatic low temperature storage tank 18 is equal to or higher than the threshold value, the electric motor 5 is used to compress the compressor 6. Is driven to generate a high-temperature and high-pressure heat medium, and after the temperature is reduced by the temperature difference generator 22, it is expanded by the expansion turbine 14 to replenish the amount of cold heat held by the heat medium stored in the accumulator adiabatic low-temperature storage tank 18 (accumulation). Since the temperature of the heat medium stored in the adiabatic low-temperature storage tank 18 can be lowered), the temperature difference generator 22 can efficiently generate electricity.

(Machine learning device)
In some embodiments, as shown in FIG. 1, a machine learning device 88 configured to learn power and heat supply and demand trends at each of the plurality of target sites may be further provided. In this case, the integrated thermoelectric supply and demand system 52 is based on the power and heat supply and demand tendency at each of the plurality of target sites learned by the machine learning device 88 (hereinafter, simply referred to as "learning result of the machine learning device 88"). Therefore, it is configured to optimize the supply and demand of electric power and heat in the entire plurality of combined heat and power supply systems 2. The machine learning device 88 is composed of a computer, and includes a CPU (processor) (not shown), a storage device including a memory such as ROM and RAM, and an external storage device. Further, between the machine learning device 88, the integrated thermoelectric supply and demand system, and various facilities of 100 demand units, an intercommunication means (whether wired or wireless) necessary for exchanging data and instruction command signals is included. In the example shown in FIG. 1, the machine learning device 88 is provided in the integrated thermoelectric supply and demand system 52, but the machine learning device 88 may be provided for each site thermoelectric supply and demand system 50, or may be provided in other places. It may have been.

Based on the learning results of the machine learning device 88, the integrated heat and power supply and demand system 52 is, for example, a compressor for a site having a particularly high demand for a high temperature heat medium among a plurality of target sites corresponding to a plurality of regional heat and power combined supply systems 2. The heat supply and demand may be optimized so that the extremely high temperature heat medium immediately after the compression in No. 6 is extracted from the first flow path 8 and positively supplied. Further, the integrated heat / power supply / supply system 52 is based on the learning result of the machine learning device 88, for example, a site having a particularly high demand for a low-temperature heat medium among a plurality of target sites corresponding to a plurality of regional heat / power supply systems 2 (for example, food). In areas where there are many factories, etc.), the heat supply and demand is optimized so that the extremely low temperature heat medium immediately after expansion in the expansion turbine 14 is extracted from the downstream side of the expansion turbine 14 in the second flow path and actively supplied. May be done. Further, the integrated heat and power supply and demand system 52 is based on the learning result of the machine learning device 88, for example, to a site that does not require a high temperature or low temperature heat medium among a plurality of target sites corresponding to a plurality of regional heat and power combined supply systems 2. May optimize the supply and demand of heat so as to supply the heat medium (return heat medium) after working at each site.

The integrated heat and power supply and demand system 52 is based on the learning result of the machine learning device 88, for example, at each of a plurality of target sites corresponding to a plurality of regional heat and power combined supply systems 2, in accordance with the depopulation and congestion of the population in the site. , The amount of power generated by the temperature difference generator 22, the amount of power generated by a generator (not shown) connected to the expansion turbine 14, the drive of the electric motor 5, the amount of heat stored in each of the accumulator adiabatic high temperature storage tank 10 and the accumulator adiabatic low temperature storage tank 18, and heat storage. The timing may be controlled to avoid insufficient or excessive supply of electric power and heat. Further, in the integrated heat and power supply and demand system 52, for example, at each of a plurality of target sites corresponding to a plurality of regional heat and power combined supply systems 2, fluctuations in power and heat demand due to lifestyle such as age composition and employment status of people in the site. Based on the learning result of the machine learning device 88 about the amount (for example, the energy usage time and the usage amount at home), the power generation amount of the temperature difference generator 22 and the power generation amount of the generator (not shown) connected to the expansion turbine 14. It is also possible to control the drive of the electric motor 5, the amount of heat stored in each of the pressure-accumulated heat-insulated high-temperature storage tank 10 and the pressure-accumulated heat-insulated low-temperature storage tank 18, and the timing of heat storage to avoid insufficient or excessive supply of electric power and heat.

FIG. 3 is a schematic diagram showing a schematic configuration of the regional combined heat and power system 2 (2B) according to the embodiment. In the regional combined heat and power system 2 (2B) shown in FIG. 3, the reference numerals common to each configuration of the regional combined heat and power system 2 (2A) shown in FIG. 1 are the regional combined heat and power system 2 (2B) shown in FIG. 1 unless otherwise specified. The configuration similar to each configuration of 2A) shall be shown, and the description thereof will be omitted.

The regional combined heat and power system 2 (2B) shown in FIG. 3 includes a first branch flow path 60, a geothermal heat exchange device 62, a first return flow path 64, a second branch flow path 66, and a second return flow path 68. It is different from the regional combined heat and power system 2 (2A) shown in FIG.

The first branch flow path 60 branches from between the temperature difference generator 22 and the expansion turbine 14 in the second flow path 12, and the heat medium supplied from the second flow path 12 is used in the geothermal heat exchange device 62. It is configured to flow to the first heat exchange unit 70 or the second heat exchange unit 72.

The first heat exchange unit 70 is connected to the first branch flow path 60 and heats the high-temperature and high-pressure heat medium supplied from the first branch flow path 60 by heat exchange with geothermal heat as unused energy. It is configured in. The first heat exchange unit 70 may be configured to heat the heat medium by exchanging heat with unused energy such as exhaust heat from a factory or exhaust heat from a waste incinerator, instead of geothermal heat. ..

The first return flow path 64 is connected to the first heat exchange section 70, and the high-temperature and high-pressure heat medium that has passed through the first heat exchange section 70 is transferred to the accumulator-insulated high-temperature storage tank 10 and the temperature difference generator 22 in the second flow path 12. It is configured to supply between and.

As described above, in the regional heat and power combined supply system 2 (2B), the circulation flow path 74 (FIG. Of the two thick wire portions of No. 4, the circulation flow path including the upper thick wire portion and the first heat exchange portion 70) can be configured.

The second branch flow path 66 branches from between the temperature difference generator 22 and the compressor 6 in the third flow path 20, and geothermal heat exchanges the low-temperature low-pressure heat medium supplied from the third flow path 20. It is configured to flow to the first heat exchange unit 70 or the second heat exchange unit 72 of the device 62.

The second heat exchange unit 72 is connected to the second branch flow path 66 so as to cool the low-temperature low-pressure heat medium supplied from the second branch flow path 66 by heat exchange with geothermal heat as unused energy. It is configured in. The second heat exchange unit 72 may be configured to cool the heat medium by heat exchange with unused energy such as river, seawater, sewage, or snow and ice heat instead of geothermal heat.

The second return flow path 68 is connected to the second heat exchange section 72, and the low-temperature low-temperature heat medium that has passed through the second heat exchange section 72 is transferred to the accumulator-insulated low-temperature storage tank 18 and the temperature difference generator 22 in the third flow path 20. It is configured to supply between and.

As described above, in the regional heat and power combined supply system 2 (2B), the circulation flow path 76 is formed by a part of the third flow path 20, the second branch flow path 66, the second heat exchange section 72, and the second return flow path 68 (FIG. Of the two thick wire portions of No. 4, the circulation flow path including the lower thick wire portion and the second heat exchange portion 72) can be configured.

In the temperature difference generator 22, when the amount of heat possessed by the heat medium flowing through the second flow path 12 and the amount of cold heat possessed by the heat medium flowing through the third flow path 20 are not balanced, the temperature difference generator 22 generates power. It cannot be done efficiently. In this regard, according to the heat storage type temperature difference storage battery of the regional heat and power combined supply system 2 (2B), the heat medium flowing between the temperature difference generator 22 and the expansion turbine 14 in the second flow path 12 is the first branch flow path. It is supplied to the first heat exchange unit 70 via 60, heated by heat exchange with geothermal heat in the first heat exchange unit 70, and then stored in the second flow path 12 in the first return flow path 64. It can be supplied between 10 and the temperature difference generator 22. Therefore, when the amount of heat possessed by the heat medium flowing through the second flow path 12 is insufficient with respect to the amount of cold heat possessed by the heat medium flowing through the third flow path 20 (in the case of insufficient heat medium), the first step is made. The amount of heat of the heat medium flowing through the two flow paths 12 can be replenished by using geothermal heat, and the temperature difference generator 22 can efficiently generate heat.

Further, the heat medium flowing through the third flow path 20 is supplied to the second heat exchange section 72 via the second branch flow path 66, and is cooled by the second heat exchange section 72 by heat exchange with geothermal heat. The second return flow path 68 can supply heat between the accumulator adiabatic low temperature storage tank 18 and the temperature difference generator 22 in the third flow path 20. Therefore, when the amount of cold heat possessed by the heat medium flowing through the third flow path 20 is insufficient with respect to the amount of heat possessed by the heat medium flowing through the second flow path 12 (in the case of insufficient refrigerant), the third channel is used. The amount of cold heat of the heat medium flowing through the flow path 20 can be replenished by using unused energy, and the temperature difference generator 22 can efficiently generate electricity.

In the configurations shown in FIGS. 3 and 4, the compressor 6, the first flow path 8, the accumulator adiabatic high temperature storage tank 10, the second flow path 12, the expansion turbine 14, the accumulator adiabatic low temperature storage tank 18, the third flow path 20 and the like. The temperature difference generator 22, the first branch flow path 60, the first heat exchange section 70, the first return flow path 64, the second branch flow path 66, the second heat exchange section 72, and the second return flow path 68 are heat storage type. The temperature difference storage battery 3 is configured.

FIG. 5 is a schematic diagram showing a schematic configuration of the regional combined heat and power system 2 (2C) according to the embodiment. In the regional combined heat and power system 2 (2C) shown in FIG. 5, the reference numerals common to the configurations of the above-mentioned regional combined heat and power system 2 (2A) and the above-mentioned regional combined heat and power system 2 (2B) are the same as those described above unless otherwise specified. The same configurations as those of the system 2 (2A) and the regional combined heat and power system 2 (2B) will be shown, and the description thereof will be omitted.

The regional combined heat and power system 2 (2C) shown in FIG. 5 is different from the regional combined heat and power system 2 (2B) shown in FIG. 3 in that the temperature control channels 78 and 80 are provided. Basically, the temperature control flow path 78 is connected to the second heat exchange section 72, and the temperature control flow path 80 is connected to the first heat exchange section 70. However, in order to operate the system efficiently, a switching valve or the like may be installed to connect the temperature control flow path 78 to the first heat exchange section 70 and the temperature control flow path 80 to the second heat exchange section 72. .. However, each flow path is switched so that the heat medium supplied from the first branch flow path 60 and the heat medium supplied from the second branch flow path 66 do not mix in the geothermal heat exchange device 62. When the first branch flow path 60 is the flow path on the inlet side of the heat medium with respect to the first heat exchange unit 70, the temperature adjustment flow path 78 is the flow path on the outlet side of the heat medium with respect to the first heat exchange unit 70. When the two-branch flow path 66 is the flow path on the inlet side of the heat medium with respect to the second heat exchange unit 72, the temperature adjustment flow path 80 is the flow path on the outlet side of the heat medium with respect to the second heat exchange unit 72. When the first branch flow path 60 is the flow path on the inlet side of the heat medium with respect to the second heat exchange unit 72, the temperature adjustment flow path 78 is the flow path on the outlet side of the heat medium with respect to the second heat exchange unit 72. When the two-branch flow path 66 is the flow path on the inlet side of the heat medium with respect to the first heat exchange unit 70, the temperature adjustment flow path 80 is the flow path on the outlet side of the heat medium with respect to the first heat exchange unit 70.

The temperature control flow path 78 is used when it is necessary to control the temperature of the high temperature and high pressure heat medium flowing through the second flow path 12. Specifically, it is used when the temperature does not drop sufficiently in the temperature difference generator 22.
The temperature control flow path 80 is used when it is necessary to control the temperature of the low temperature and high pressure heat medium flowing through the third flow path 20. Specifically, it is used when the temperature does not rise sufficiently in the temperature difference generator 22.

In the configuration shown in FIG. 5, the compressor 6, the first flow path 8, the accumulator heat insulation high temperature storage tank 10, the second flow path 12, the expansion turbine 14, the accumulator heat insulation low temperature storage tank 18, the third flow path 20, and the temperature difference power generation. Machine 22, first branch flow path 60, first heat exchange section 70, first return flow path 64, second branch flow path 66, second heat exchange section 72, second return flow path 68, and temperature control flow path 78. , 80 constitute the heat storage type temperature difference storage battery 3.

The present disclosure is not limited to the above-described embodiment, and includes a modified form of the above-mentioned embodiment and a form in which these forms are appropriately combined.

For example, in each of the above-mentioned regional combined heat and power supply systems 2 (2A to 2C), another expansion device (evaporator such as a pressure reducing valve) such as an expansion valve may be provided instead of the expansion turbine 14.

Further, in the above-described embodiment, the case where the electric power generated by the temperature difference generator 22 and the electric power generated by the generator connected to the expansion turbine 14 are supplied to the demand body 100 of the target site is exemplified. The electric power generated by the differential generator 22 and the electric power generated by the generator connected to the expansion turbine 14 may be used, for example, to drive the electric motor 5, or sold to the electric power company via the integrated thermoelectric supply and demand system 52. You may.

Further, for example, in each of the above-mentioned regional combined heat and power supply systems 2 (2A to 2C), a buffer for storing a heat medium in each flow path such as the first flow path 8, the second flow path 12, and the third flow path 20. The tank may be installed as needed. Further, the buffer tank may be provided with a remaining amount sensor (capacity sensor) for detecting the remaining amount of the heat medium in the buffer tank.

Further, in some of the above-described embodiments, the power transmission lines 32, 33, 34, 35, 36, 37, 38 are provided, but each power transmission line is not an essential configuration for the regional combined heat and power system 2. For example, water may be electrolyzed with the electric power generated by the temperature difference generator 22 to produce hydrogen, and the hydrogen may be transported to the demand body 100 to generate power by a fuel cell on the demand body 100 side.

Further, for example, in each of the above-mentioned regional combined heat and power supply systems 2 (2A to 2C), the accumulator adiabatic low temperature storage tank 18 is provided on the downstream side of the expansion turbine 14 in the second flow path 12, but the accumulator adiabatic low temperature storage tank 18 is provided. May be provided on the upstream side of the expansion turbine 14 in the second flow path 12. In this case, in each of the above-mentioned regional combined heat and power supply systems 2 (2A to 2C), the position of the expansion turbine 14 and the position of the accumulator adiabatic low temperature storage tank 18 may be exchanged (see, for example, FIG. 6). As a result, the heat medium of the liquid before being vaporized by the expansion turbine 14 can be stored in the accumulator adiabatic low temperature storage tank 18. Therefore, the accumulator adiabatic low temperature storage tank 18 can be downsized as compared with the case where the gas heat medium after being vaporized by the expansion turbine 14 is stored in the accumulator adiabatic low temperature storage tank 18.

The contents described in each of the above embodiments are grasped as follows, for example.

(1) The heat storage type temperature difference storage battery (for example, the above-mentioned heat storage type temperature difference storage battery 3) according to the embodiment of the present disclosure is
A compressor for compressing a heat medium (for example, the compressor 6 described above) and
A first flow path (for example, the above-mentioned first flow path 8) connected to the compressor and for flowing the heat medium compressed by the compressor, and
A pressure-accumulation heat-insulated high-temperature storage tank (for example, the above-mentioned pressure-accumulation heat-insulating high-temperature storage tank 10) connected to the first flow path and for storing the heat medium supplied from the first flow path.
A second flow path (for example, the above-mentioned second flow path 12) connected to the pressure-accumulation heat-insulated high-temperature storage tank and for flowing the heat medium leaving the pressure-accumulation heat-insulating high-temperature storage tank.
An expansion device (for example, the expansion turbine 14 described above) provided in the second flow path and configured to reduce the pressure of the heat medium flowing through the second flow path.
A pressure-accumulation adiabatic low-temperature storage tank (for example, the above-mentioned pressure-accumulation adiabatic low-temperature storage tank 18) provided on the upstream side or the downstream side of the expansion device in the second flow path and for storing the heat medium of the second flow path.
A third flow path (eg, the above-mentioned first flow path) connected to the downstream side of the second flow path and configured to supply the heat medium through each of the expansion device and the accumulator adiabatic low temperature storage tank to the compressor. 3 flow paths 20) and
A temperature difference generator configured to generate electricity by utilizing the temperature difference between the heat medium flowing on the upstream side of the expansion device in the second flow path and the heat medium flowing on the third flow path (for example, the above-mentioned above). Temperature difference generator 22) and
To prepare for.

According to the heat storage type temperature difference storage battery described in (1) above, the heat medium compressed by the compressor and in a high temperature and high pressure state is sent to a pressure storage heat insulating high temperature storage tank via the first flow path and stored. ..
The high-temperature and high-pressure heat medium that has left the accumulator-insulated high-temperature storage tank is supplied to the temperature difference generator through the second flow path, dissipates heat in the temperature difference generator, and is supplied to the expansion device. The heat medium supplied to the inflator is depressurized by the inflator to become a low-temperature low-pressure heat medium. The low-temperature low-pressure heat medium that has passed through each of the expansion device and the accumulator adiabatic low-temperature storage tank is supplied to the temperature difference generator via the third flow path, supplies cold heat to the temperature difference generator, and then returns to the compressor. ..
In this way, the heat pump cycle is constructed by the circulation flow path of the heat medium provided with the compressor, the first flow path, the accumulator heat insulating high temperature storage tank, the expansion device, the accumulator heat insulating low temperature storage tank, the third flow path and the temperature difference generator. Therefore, it is possible to efficiently generate a high-temperature high-pressure heat medium and a low-temperature low-pressure heat medium with a small input energy.
In addition, electric power is stored by storing the generated high-temperature and high-pressure heat medium and low-temperature and low-pressure heat medium in the pressure-accumulation heat insulation high-temperature storage tank and the pressure-accumulation heat insulation low-temperature storage tank, respectively. Since it is possible to supply power from a storage tank to a high-temperature high-pressure heat medium, a low-temperature low-pressure heat medium, and a temperature difference generator, a new type of power generation is performed using heat media with different temperatures stored in a heat pump cycle. It is possible to provide a heat storage type temperature difference storage battery which is a type of battery.
According to this heat storage type temperature difference storage battery, for example, the configuration described in Patent Document 1 (a configuration in which an expansion turbine is driven by a high-temperature and high-pressure heat medium flowing through a heat pump cycle and power is generated by a generator connected to the expansion turbine). In comparison with, the heat medium in the heat pump cycle can be used to generate electricity with a simple configuration.

(2) In some embodiments, in the heat storage type temperature difference storage battery described in (1) above,
A first branch flow path (for example, the above-mentioned first branch) for branching from between the temperature difference generator and the expansion device in the second flow path and allowing the heat medium supplied from the second flow path to flow. Channel 60) and
A first heat exchange unit (for example, the above-mentioned first) connected to the first branch flow path and configured to heat the heat medium supplied from the first branch flow path by heat exchange with unused energy. Heat exchange unit 70) and
It is configured to connect to the first heat exchange section and supply the heat medium that has passed through the first heat exchange section between the accumulator heat insulating high temperature storage tank and the temperature difference generator in the second flow path. The first return flow path (for example, the above-mentioned first return flow path 64) and
Further prepare.

In the temperature difference generator, when the amount of heat possessed by the heat medium flowing through the second flow path and the amount of cold heat possessed by the heat medium flowing through the third flow path are not balanced, the temperature difference generator efficiently generates power. I can't. In this regard, according to the heat storage type temperature difference storage battery described in (2) above, the heat medium flowing through the second flow path is supplied to the first heat exchange section via the first branch flow path, and the first heat exchange section is provided. After heating by heat exchange with unused energy, it can be supplied between the pressure-accumulated heat-insulated high-temperature storage tank and the temperature difference generator in the second flow path in the first return flow path. Therefore, when the amount of heat possessed by the heat medium flowing through the second flow path is insufficient with respect to the amount of cold heat possessed by the heat medium flowing through the third flow path (in the case of insufficient heat medium), the second flow. The amount of heat of the heat medium flowing through the path can be replenished by using unused energy or the like, and the temperature difference generator can efficiently generate electricity.

(3) In some embodiments, in the heat storage type temperature difference storage battery according to the above (1) or (2).
A second branch flow path (for example, the above-mentioned second branch) for branching from between the temperature difference generator and the compressor in the third flow path and allowing the heat medium supplied from the third flow path to flow. Channel 66) and
A second heat exchange unit (for example, the above-mentioned second heat exchange unit) connected to the second branch flow path and configured to cool the heat medium supplied from the second branch flow path by heat exchange with unused energy. Heat exchange unit 72) and
It is configured to connect to the second heat exchange section and supply the heat medium that has passed through the second heat exchange section between the accumulator adiabatic low temperature storage tank and the temperature difference generator in the third flow path. The second return flow path (for example, the above-mentioned second return flow path 68) and
Further prepare.

In the temperature difference generator, when the amount of heat possessed by the heat medium flowing through the second flow path and the amount of cold heat possessed by the heat medium flowing through the third flow path are not balanced, the temperature difference generator efficiently generates power. I can't. In this regard, according to the heat storage type temperature difference storage battery described in (3) above, the heat medium flowing through the third flow path is supplied to the second heat exchange section via the second branch flow path, and the second heat exchange section is provided. After cooling by heat exchange with unused energy, it can be supplied between the pressure-accumulated adiabatic low-temperature storage tank in the third flow path and the temperature difference generator in the second return flow path. Therefore, when the amount of cold heat possessed by the heat medium flowing through the third flow path is insufficient with respect to the amount of heat possessed by the heat medium flowing through the second flow path (in the case of insufficient refrigerant), the third flow path The amount of cold heat of the heat medium flowing through the surface can be replenished by using unused energy or the like, and the temperature difference generator can efficiently generate electricity.

(4) The combined heat and power system according to the embodiment of the present disclosure is
The heat storage type temperature difference storage battery according to any one of (1) to (3) above,
A fourth flow path (for example, the above-mentioned fourth channel) connected to the pressure-accumulation adiabatic high-temperature storage tank and configured to supply the heat medium from the accumulator-insulated high-temperature storage tank to a demand body (for example, the above-mentioned demand body 100) of the target site. Channel 24) and
To prepare for.

According to the combined heat and power system described in (4) above, the heat storage type temperature difference storage battery is used to satisfy the heat demand (for example, heating demand and hot water supply demand) of the demand body by using the heat medium stored in the heat storage heat insulation high temperature storage tank. Can be done.

(5) In some embodiments, in the combined heat and power system described in (4) above,
Further provided with a fifth flow path (for example, the above-mentioned 65th flow path 26) for recovering the heat medium supplied to the demand body through the fourth flow path from the demand body.
The fifth flow path is configured to supply the heat medium recovered from the demand body to a position between the temperature difference generator and the expansion device in the second flow path.

According to the combined heat and power system described in (5) above, a first flow path, a pressure-accumulated heat-insulated high-temperature storage tank, a fourth flow path, a fifth flow path, an expansion device, a pressure-accumulated heat-insulated low-temperature storage tank, and a third flow path are provided. Since the heat pump cycle can be constructed by the circulation flow path of the heat medium, the high temperature and high pressure heat medium can be efficiently supplied to the demand body with a small input energy.

(6) In some embodiments, in the combined heat and power system according to (4) or (5) above.
A sixth flow path (for example, the above-mentioned sixth flow path 28) connected to the pressure-accumulation adiabatic low-temperature storage tank is further provided.
The sixth flow path is configured to supply the heat medium from the accumulator-insulated low-temperature storage tank to the demand body of the target site.

According to the combined heat and power system described in (6) above, the heat storage type temperature difference storage battery can satisfy the cold heat demand (for example, cooling demand) of the demand body by using the heat medium stored in the pressure storage heat insulating low temperature storage tank.

(7) In some embodiments, in the combined heat and power system described in (6) above,
A seventh flow path (for example, the above-mentioned seventh flow path 30) for recovering the heat medium supplied to the demand body via the sixth flow path is further provided.
The seventh flow path is configured to supply the heat medium recovered from the demand body to a position between the temperature difference generator and the compressor in the third flow path.

According to the combined heat and power system described in (7) above, a first flow path, a pressure-accumulated heat-insulated high-temperature storage tank, a second flow path, an expansion device, a pressure-accumulated heat-insulated low-temperature storage tank, a sixth flow path, and a seventh flow path are provided. Since the heat pump cycle can be constructed by the circulation flow path of the heat medium, the low temperature and low pressure heat medium can be efficiently supplied to the demand body with a small input energy.

(8) In some embodiments, in the combined heat and power system described in (1) above,
The pressure-accumulation adiabatic low-temperature storage tank is provided on the upstream side of the expansion device in the second flow path.

According to the combined heat and power system described in (8) above, the heat medium of the liquid before being vaporized by the expansion device can be stored in the accumulator adiabatic low temperature storage tank. Therefore, the accumulator adiabatic low temperature storage tank can be downsized as compared with the case where the gas heat medium after being vaporized by the expansion device is stored in the accumulator adiabatic low temperature storage tank.

(9) In some embodiments, in the combined heat and power system according to any one of (1) to (8) above.
An electric motor for driving the compressor (for example, the electric motor 5 described above) and
A remaining amount sensor (for example, the above-mentioned remaining amount sensor) for detecting the remaining amount of the heat medium of the pressure-accumulated heat-insulated high-temperature storage tank, and the remaining amount sensor.
A motor control unit that controls the electric motor (for example, the motor control unit 86 described above) and
Equipped with
The motor control unit is configured to drive the electric motor when the remaining amount of the heat medium in the accumulator heat insulating high temperature storage tank detected by the remaining amount sensor is equal to or less than a threshold value.

In a temperature difference generator, if the amount of heat held by the heat medium stored in the accumulator adiabatic high temperature storage tank and the amount of cold heat held by the heat medium stored in the accumulator adiabatic low temperature storage tank are not balanced, power generation by the temperature difference generator is performed. It cannot be done efficiently. In this regard, according to the heat storage type temperature difference storage battery described in (9) above, the compressor is driven by an electric motor when the remaining amount of the heat medium of the heat storage heat insulating high temperature storage tank detected by the remaining amount sensor is equal to or less than the threshold value. Since it is possible to replenish the amount of heat possessed by the heat medium stored in the pressure-accumulation heat-insulating high-temperature storage tank, it is possible to efficiently generate electricity with the temperature difference generator.

(10) In some embodiments, in the combined heat and power system according to any one of (1) to (9) above.
An electric motor for driving the compressor (for example, the electric motor 5 described above) and
A remaining amount sensor (for example, the above-mentioned remaining amount sensor) for detecting the remaining amount of the heat medium of the pressure-accumulated heat-insulated low-temperature storage tank, and the remaining amount sensor.
A motor control unit that controls the electric motor (for example, the motor control unit 86 described above) and
Equipped with
The motor control unit is configured to drive the electric motor when the remaining amount of the heat medium of the accumulator adiabatic low temperature storage tank detected by the remaining amount sensor is equal to or less than the threshold value.

In a temperature difference generator, if the amount of heat held by the heat medium stored in the accumulator adiabatic high temperature storage tank and the amount of cold heat held by the heat medium stored in the accumulator adiabatic low temperature storage tank are not balanced, power generation by the temperature difference generator is performed. It cannot be done efficiently. In this regard, according to the heat storage type temperature difference storage battery described in (10) above, the compressor is driven by an electric motor when the remaining amount of the heat medium in the heat storage adiabatic low temperature storage tank detected by the remaining amount sensor is equal to or less than the threshold value. Since the amount of cold heat possessed by the heat medium stored in the heat storage adiabatic low-temperature storage tank can be replenished, the temperature difference generator can efficiently generate electricity.

(11) The combined heat and power system group according to the embodiment of the present disclosure is
The combined heat and power system group (for example, the above-mentioned regional combined heat and power system group 4) including a plurality of combined heat and power systems according to any one of (1) to (10) above.
The plurality of combined heat and power systems are provided corresponding to each of a plurality of target sites.
The combined heat and power system group further includes a centralized heat and power supply and demand system (for example, the above-mentioned centralized heat and power supply and supply system 52) configured to optimize the supply and demand of electric power and heat in the entire plurality of combined heat and power systems.

According to the combined heat and power system described in (11) above, the integrated heat and power supply and demand system optimizes the supply and demand of power and heat in the entire combined heat and power supply system to equalize the power and heat load and reduce the input energy. Can efficiently meet power and heat demands.

(12) In some embodiments, in the combined heat and power system group described in (11) above,
Further, a machine learning device (for example, the above-mentioned machine learning device 88) for learning the supply and demand tendency of electric power and heat at each of the plurality of target sites is further provided.
The integrated heat and power supply and demand system is based on the power and heat supply and demand trends and the power market price at each of the plurality of target sites learned by the machine learning device, and the power and heat supply and demand in the entire plurality of heat and power combined supply systems. It is configured to perform optimization.

According to the combined heat and power system group described in (12) above, the supply and demand tendency of electric power and heat at each of the plurality of target sites is learned, and the supply and demand of electric power and heat is optimized for the entire plurality of combined heat and power systems. Therefore, the load of electric power and heat can be leveled, and the electric power demand and heat demand can be efficiently satisfied with a small amount of input energy.

2 Regional heat and power combined supply system 3 Regional heat storage type temperature difference storage battery 4 Regional heat and power combined supply system group 5 Electric motor 6 Compressor 8 1st flow path 10 Accumulation heat insulation high temperature storage tank 12 2nd flow path 14 Expansion device 18 Storage pressure insulation low temperature storage tank 20 3rd flow Road 22 Temperature difference generator 24 4th flow path 26 5th flow path 25 Circulation flow path 28 6th flow path 30 7th flow path 32, 33, 34, 35, 36, 37, 38 Transmission line 50 Site heat and electricity supply and demand system 52 Integrated heat and electricity supply and demand system 60 1st branch flow path 62 Underground heat heat exchange device 64 1st return flow path 66 2nd branch flow path 68 2nd return flow path 70 1st heat exchange section 72 2nd heat exchange section 74, 76 Circulation flow path 78,80 Temperature control flow path 82,84 Temperature sensor 86 Motor control unit 88 Machine learning device 100 Demand unit

Claims (12)

A compressor for compressing the heat medium,
A first flow path connected to the compressor and for flowing the heat medium compressed by the compressor,
A pressure-accumulation adiabatic high-temperature storage tank connected to the first flow path and for storing the heat medium supplied from the first flow path,
A second flow path connected to the accumulator adiabatic high temperature storage tank and for flowing the heat medium leaving the accumulator adiabatic high temperature storage tank.
An expansion device provided in the second flow path and configured to reduce the pressure of the heat medium flowing through the second flow path.
A pressure-accumulation adiabatic low-temperature storage tank provided on the upstream side or the downstream side of the expansion device in the second flow path and for storing the heat medium of the second flow path.
A third flow path connected to the downstream side of the second flow path and configured to supply the heat medium through each of the expansion device and the accumulator adiabatic low temperature storage tank to the compressor.
A temperature difference generator configured to generate electricity by utilizing the temperature difference between the heat medium flowing on the upstream side of the expansion device in the second flow path and the heat medium flowing through the third flow path.
A heat storage type temperature difference storage battery. A first branch flow path for branching from between the temperature difference generator and the expansion device in the second flow path and allowing the heat medium supplied from the second flow path to flow.
A first heat exchange unit connected to the first branch flow path and configured to heat the heat medium supplied from the first branch flow path by heat exchange with unused energy.
It is configured to connect to the first heat exchange section and supply the heat medium that has passed through the first heat exchange section between the accumulator heat insulating high temperature storage tank and the temperature difference generator in the second flow path. The first return flow path and
The heat storage type temperature difference storage battery according to claim 1. A second branch flow path for branching from between the temperature difference generator and the compressor in the third flow path and allowing the heat medium supplied from the third flow path to flow.
A second heat exchange unit connected to the second branch flow path and configured to cool the heat medium supplied from the second branch flow path by heat exchange with unused energy.
It is configured to connect to the second heat exchange section and supply the heat medium that has passed through the second heat exchange section between the accumulator adiabatic low temperature storage tank and the temperature difference generator in the third flow path. The second return flow path and
The heat storage type temperature difference storage battery according to claim 1 or 2, further comprising. The heat storage type temperature difference storage battery according to any one of claims 1 to 3.
A fourth flow path connected to the accumulator adiabatic high temperature storage tank and configured to supply the heat medium from the accumulator adiabatic high temperature storage tank to the demand body of the target site.
A combined heat and power system. Further, a fifth flow path for recovering the heat medium supplied to the demand body through the fourth flow path from the demand body is provided.
According to claim 4, the fifth flow path is configured to supply the heat medium recovered from the demand body to a position between the temperature difference generator and the expansion device in the second flow path. The combined heat and power system described. Further provided with a sixth flow path connected to the accumulator adiabatic low temperature storage tank,
The combined heat and power system according to claim 4 or 5, wherein the sixth flow path is configured to supply the heat medium from the accumulator-insulated low-temperature storage tank to the demand body of the target site. A seventh flow path for recovering the heat medium supplied to the demand body via the sixth flow path is further provided.
According to claim 6, the seventh flow path is configured to supply the heat medium recovered from the demand body to a position between the temperature difference generator and the compressor in the third flow path. The combined heat and power system described. The heat storage type temperature difference storage battery according to claim 1, wherein the pressure storage heat insulating low temperature storage tank is provided on the upstream side of the expansion device in the second flow path. The electric motor that drives the compressor and
A remaining amount sensor for detecting the remaining amount of the heat medium of the pressure-accumulated heat-insulated high-temperature storage tank, and
A motor control unit that controls the electric motor,
Equipped with
The motor control unit is configured to drive the electric motor when the remaining amount of the heat medium of the accumulator heat insulating high temperature storage tank detected by the remaining amount sensor is equal to or less than a threshold value. The combined heat and power supply system according to any one of the above items. The electric motor that drives the compressor and
A remaining amount sensor for detecting the remaining amount of the heat medium of the pressure-accumulated heat-insulated low-temperature storage tank, and
A motor control unit that controls the electric motor,
Equipped with
The motor control unit is configured to drive the electric motor when the remaining amount of the heat medium of the accumulator adiabatic low temperature storage tank detected by the remaining amount sensor is equal to or less than a threshold value. The combined heat and power supply system according to any one of the above items. A group of heat and power cogeneration systems including a plurality of heat and power cogeneration systems according to any one of claims 1 to 10.
The plurality of combined heat and power systems are provided corresponding to each of a plurality of target sites.
The combined heat and power system group is a group of combined heat and power systems further including a centralized heat and supply system configured to optimize the supply and demand of electric power and heat in the entire plurality of combined heat and power systems. Further equipped with a machine learning device for learning the supply and demand tendency of electric power and heat at each of the plurality of target sites.
The integrated heat and power supply and demand system optimizes the power and heat supply and demand of the entire plurality of combined heat and power systems based on the power and heat supply and demand trends of each of the plurality of target sites learned by the machine learning device. The combined heat and power system group according to claim 11, which is configured in the above.

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