JP2004211979A - Absorption refrigerating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorption refrigerating system allowing the efficient operation of heat from various portions while solving an unbalance between a power demand and a heat demand. <P>SOLUTION: This absorption refrigerating system comprises a hot water storage tank 1 storing exhaust heat from a fuel cell 2 generating power by the electrochemical reaction between fuel formed mainly of hydrogen and oxidizer, an absorption refrigerating machine 3 operated by using, as heat source, the heat stored in the hot water storage tank 1, generating cold, and supplying the cold to a cold consumer 6, a cooling tower 5 dissipating waste heat from the fuel cell 2 or the absorption refrigerating machine 3, and a compression refrigerating machine 7 generating the cold while supplying heat to the hot water storage tank 1 and supplying the cool air to the cold consumer. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an absorption refrigeration system, and more particularly to an absorption refrigeration system that can utilize exhaust heat from a fuel cell.
[0002]
[Prior art]
Conventionally, fuel cells for general households and cogeneration systems that provide hot water supply and heating using exhaust heat have been expected as the next-generation decentralized energy supply system, combining an air conditioner such as an absorption refrigerator with a fuel cell. (For example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2000-274732 (paragraph 0011, FIG. 1, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7)
[0004]
[Problems to be solved by the invention]
In the conventional system as described above, when the demand for cold heat is higher than the demand for electric power, it is necessary to supplement the cold heat by another device. In addition, when the demand for electric power is higher than the demand for cold heat, the exhausted heat is discharged to the environment without using the waste water.
[0005]
Therefore, an object of the present invention is to provide an absorption refrigeration system that efficiently uses heat from various places while solving an imbalance between power demand and heat demand.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an absorption refrigeration system according to the first aspect of the present invention provides a fuel cell that generates power by an electrochemical reaction between a fuel containing hydrogen as a main component and an oxidant, as shown in FIG. A hot water storage tank 1 for storing waste heat from the storage tank 2; an absorption refrigerator 3 that operates using the heat stored in the hot water storage tank 1 as a heat source, generates cold heat, and supplies the cold heat to a cold heat demand destination 6; Or a cooling tower 5 for dissipating exhaust heat from the absorption refrigerator 3; and a compression refrigerator 7 for generating cold while supplying heat to the hot water storage tank 1 and supplying the cold to a cold energy demand destination.
[0007]
The cooling tower may be a sensible heat cooling tower that cools a cooling medium by exchanging sensible heat with air, in addition to a latent heat cooling tower that sprays water to a filler to cool water with evaporation heat.
[0008]
With this configuration, the fuel cell is provided with the hot water storage tank for storing the exhaust heat from the fuel cell, so that the fuel cell can be operated regardless of the cold heat demand, and the heat stored in the hot water storage tank is operated as a heat source to generate cold heat. In addition, since an absorption refrigerator is provided to supply the cold to the cold demand destination, cold heat can be supplied to the cold demand destination regardless of the power generation amount of the fuel cell, and the exhaust heat from the fuel cell or the absorption refrigerator is dissipated. Since it is equipped with a cooling tower, it is possible to generate electricity even when the hot water tank is full, and to provide a cold refrigerator while generating heat while supplying heat to the hot water tank, and supplying the cold heat to a cold heat demand destination. Therefore, when the amount of cold generated by the absorption refrigerator is insufficient, the amount of cold can be efficiently supplemented.
[0009]
Further, as described in claim 2, in the absorption refrigeration system according to claim 1, the absorption chiller may be, for example, a two-stage absorption chiller 3a as shown in FIG.
[0010]
With this configuration, since the two-stage absorption refrigerator is provided, low-temperature cold heat can be obtained by operation using a relatively low-temperature heating source such as exhaust heat from a fuel cell.
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings, the same or corresponding members are denoted by the same or similar reference numerals, and redundant description will be omitted.
[0011]
The absorption refrigeration system according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. The absorption refrigeration system includes a hot water storage tank 1, a fuel cell 2, an absorption refrigerator 3, a water heater 4, a cooling tower 5, an indoor air conditioner 6, and an electric compression refrigerator 7.
[0012]
The hot water storage tank 1 is connected to the fuel cell 2 by hot water pipes (hot water pipes when viewed from the hot water storage tank 1 and cooling water pipes when viewed from the fuel cell 2) 16 and 16b, and is connected to the absorption refrigerator 3 by hot water pipes. They are connected by pipes 13 and 13b, are connected to the water heater 4 by a hot water pipe 11, and are connected to the electric compression refrigerator 7 by hot water pipes 12 and 12b. Further, the electric compression refrigerator 7 and the indoor air conditioner 6 are connected by cold water pipes 15 and 15a, and the absorption refrigerator 3 and the indoor air conditioner 6 are connected by cold water pipes 14 and 14b.
The cooling tower 5 and the fuel cell 2 are connected to cooling water pipes 17 and 17a, and the absorption refrigerator 3 is connected to cooling water pipes 18 and 18b.
[0013]
The hot water pipe 16 is a pipe that supplies hot water (cooling water as viewed from the fuel cell 2 side) from the fuel cell 2 to the hot water storage tank 1, and a pump 16 a is inserted and arranged in the middle. The hot water pipe 16 b is a pipe that supplies cooling water from the hot water storage tank 1 to the fuel cell 2.
[0014]
The hot water pipe 13b is a pipe for supplying hot water from the hot water storage tank 1 to the absorption refrigerator 3, and a pump 13a is inserted and disposed on the way. The pipe 13 is a pipe for returning hot water from the absorption refrigerator 3 to the hot water storage tank 1.
[0015]
The hot water pipe 11 is a pipe for supplying hot water from the hot water storage tank 1 to the water heater 4, and a pump 11 a is inserted and arranged on the way.
[0016]
The hot water pipe 12 is a pipe for supplying hot water (cooling water as viewed from the side of the electric compression refrigerator 7) from the electric compression refrigerator 7 to the hot water storage tank 1, and a pump 12a is inserted and disposed on the way. The pipe 12 b is a pipe that supplies cooling water from the hot water storage tank 1 to the electric compression refrigerator 7. The cooling water pipe 18 is a pipe for sending cooling water from the absorption refrigerator to the cooling tower 5, and a pump 18a is inserted and arranged on the way. The pipe 18 b is a pipe that supplies cooling water from the cooling tower 5 to the absorption refrigerator 3.
[0017]
The pipe 18a is configured to join the pipe 17 to send cooling water to the cooling tower, and the pipe 18b is configured to branch from the pipe 17a to supply cooling water to the absorption refrigerator 3. Is configured to branch from the pipe 16 to send cooling water to the cooling tower, the pipe 17a is configured to join the pipe 16b to send cooling water to the fuel cell 2, and the pipe 15 is suctioned by the pump 14a of the pipe 14. The cold water is sent from the electric compression refrigerator 7 to the indoor air conditioner 6, and the pipe 15 a branches off from the pipe 14 b to return the cold water from the indoor air compressor 6 to the electric compression refrigerator 7.
A switching valve 16c is provided at a branch point between the pipe 16 and the pipe 17. The switching valve 16c switches between sending cooling water from the pump 16a to the hot water storage tank 1 and sending it to the cooling tower 5. Typically, it is a three-way valve, but it may be configured by combining two two-way valves.
[0018]
Next, the operation of the absorption refrigeration system according to the first embodiment will be described with reference to FIG. The fuel cell 2 generates exhaust heat with power generation as described later. The temperature of the exhaust heat is about 50 to 80 ° C., sent to the hot water storage tank 1 through the pipe 16 and stored in the form of hot water. The low-temperature cooling water in the hot water storage tank 1 is sent to the fuel cell 2 through the pipe 16b.
[0019]
The absorption refrigerator 3 includes an evaporator that cools the cold water in the tube by evaporating the refrigerant, an absorber that absorbs the refrigerant vapor and maintains the evaporating pressure, and a generator that concentrates the dilute solution that has absorbed the refrigerant and separates the refrigerant, as described below. And a condenser for condensing refrigerant vapor generated in the generator. Hot water in the hot water storage tank 1 is supplied as a heat source of the generator through a pipe 13b, and cool water is produced in an evaporator. 6
The cooling water whose temperature has been increased by the heat generated by the absorption and condensation of the refrigerant in the absorber and condenser of the absorption refrigerator 3 is sent to the cooling tower 5 through the pipe 18 and radiated therefrom to the outside air.
The hot water whose temperature has been reduced by the generator is returned to the hot water storage tank 1 through the pipe 13.
The cold water whose temperature has risen in the indoor air conditioner 6 is returned to the evaporator of the absorption chiller 3 through the pipe 14b, and the cooling water whose heat has radiated in the cooling tower 5 and whose temperature has fallen passes through the pipe 18b. Returned to the absorber and condenser.
[0020]
The hot water in the hot water storage tank 1 can be used as a heat source to take out hot water from the water heater 4, supply hot water to cooking, washing, bathtubs and the like, and perform heating with the hot water in winter. Hot water is supplied from the hot water storage tank 1 to the water heater 4 through a pipe 11.
[0021]
The electric compression refrigerator 7 includes an evaporator that cools the cold water in the pipe by evaporating the refrigerant as described below, a compressor that compresses the evaporated refrigerant vapor, and a condenser that deprives the compressed refrigerant vapor of heat and condenses it. And a throttle device that expands the condensed refrigerant, supplies cold water generated by the evaporator to the indoor unit 6 through the pipe 15, compensates for the amount of cold heat in the indoor unit 6, and distributes heat from the condenser to the pipe. The hot water is supplied to the hot water storage tank 1 through 12 and used for heating the hot water storage tank 1.
[0022]
When the hot water storage tank 1 is full of hot water, the switching valve 16c is switched to guide the exhaust heat of the fuel cell 2 to the cooling tower 5 through the pipes 16 and 17, where the heat is radiated, thereby generating power in the fuel cell 2. Can be continued. Cooling water is returned from the cooling tower 5 to the fuel cell 2 through the pipes 17a and 16b.
[0023]
The absorption refrigeration system according to the second embodiment of the present invention will be described with reference to the flowchart of FIG. In the second embodiment, the following points are added to the configuration of the first embodiment.
[0024]
Tap water is supplied to the hot water storage tank 1 through a pipe 20a in order to replenish hot water consumed or reduced by evaporation. The heat exchanger 9 is installed on the pipe 20a on the tap water inflow side of the hot water storage tank 1. The tap water outflow side of the heat exchanger 9 and the inflow side of the hot water storage tank 1 are connected by a pipe 20b. In the heat exchanger 9, heat is exchanged between the cooling water supplied through the pipe 19a and returned through the pipe 19b and the tap water. The pipe 19a branches from the pump 18a discharge side of the pipe 18, and the pipe 19b joins the pipe 18b.
A switching valve 18c is provided at a branch point between the pipe 18 and the pipe 19a. The switching valve 18c has the same function as the switching valve 16c, and switches between sending cooling water from the pump 18a to the heat exchanger 9 and sending it to the cooling tower 5. Typically, it is a three-way valve, but it may be configured by combining two two-way valves.
[0025]
With such a structure, heat from the absorber and condenser of the absorption refrigerator 3 is used for preheating tap water flowing into the hot water storage tank 1. The absorption heat and condensation heat of the absorption refrigerator 3 have a temperature of about 30 to 40 ° C. and can be sufficiently used for preheating tap water at about 10 to 20 ° C.
[0026]
The solar heat collector 8 is installed, and the solar heat collector 8 and the hot water tank 1 are connected by hot water pipes 21 and 21b. A hot water pump 21a is inserted and arranged in a pipe 21 from the solar heat collector 8 to the hot water storage tank 1. With such a structure, hot water heated by solar heat in the solar heat collector 8 is supplied to the hot water storage tank 1. The low-temperature water in the hot water storage tank 1 is returned to the solar heat collector 8 through the pipe 21b.
[0027]
An example of the fuel cell 2 used in the embodiment of the present invention will be described with reference to the flowchart of FIG. In this example, a polymer electrolyte fuel cell is used. The fuel cell 2 includes a fuel cell stack 2a in which a solid polymer membrane and a separator are stacked, and a reformer 2b that supplies a fuel containing hydrogen as a main component to the fuel cell stack 2a.
[0028]
The reformer 2b heats a reforming raw material such as natural gas and air with a heating fuel to reform the fuel into a fuel containing hydrogen as a main component. The reformed fuel and the oxidant are supplied to the fuel cell stack 2a to generate power by an electrochemical reaction. Since heat is generated during this power generation process, the cooling water is cooled by low-temperature cooling water supplied to the fuel cell stack through the pipe 16 b, and the cooling water whose temperature has increased to about 50 to 80 ° C. is returned through the pipe 16.
Here, the cooling water from the pipe 16b is described as being supplied to the fuel cell stack 2a. However, the cooling water may be supplied to the reformer 2b or to both the fuel cell stack 2a and the reformer 2b. Good. This is because the reformer 2b also generates a considerable amount of heat.
[0029]
An example of the absorption refrigerator 3 used in the embodiment of the present invention will be described with reference to the flowchart of FIG. In this example, a single-effect absorption refrigerator using lithium bromide as an absorbent and water as a refrigerant is used.
[0030]
The absorption refrigerator 3 evaporates the refrigerant and cools the cold water supplied through the pipe 14b, an absorber 3A that absorbs the refrigerant evaporated by the evaporator 3E with an absorbent, and a refrigerant that is absorbed by the absorber 3A. A regenerator 3G for heating the diluted solution having a low concentration by absorption to regenerate the solution by increasing the concentration, a condenser 3C for cooling and condensing the refrigerant gas discharged from the regenerator 3G with cooling water, and an absorber. It is configured to include a solution heat exchanger 3EX for performing heat exchange between the dilute solution sent from 3A to the regenerator 3G and the concentrated solution returned from the regenerator 3G to the absorber 3A. The cooled cold water is returned through the pipe 14.
[0031]
In the regenerator 3G, the solution is heated by hot water supplied through the pipe 13b, and the hot water whose temperature has decreased is returned through the pipe 13. In the absorber 3A, the absorbent generates absorption heat when absorbing the refrigerant, and this heat is radiated to the cooling water supplied through the pipe 18b. The cooling water whose temperature has risen is returned through the pipe 18.
[0032]
A solution pump for sending a dilute solution from the absorber 3A to the regenerator 3G is provided below the absorber 3A. In the absorber 3A, the solution is sprayed on the heat transfer tube by a pump to cool the solution. In addition, a refrigerant pump for dispersing the refrigerant on the heat transfer tube by the evaporator is provided. The refrigerant liquid condensed in the condenser 3C is returned to the evaporator 3E.
[0033]
An example of the compression refrigerator 7 used in the embodiment of the present invention will be described with reference to the flowchart of FIG. In this example, a case of an electric compression refrigerator in which a compressor is driven by an electric motor will be described. The electric compression refrigerator 7 evaporates a refrigerant (for example, chlorofluorocarbon) and cools cold water supplied through the pipe 15a, and an electric compressor 7COM that sucks and compresses the refrigerant evaporated by the evaporator 7E. And a condenser 7C that cools and condenses the refrigerant compressed by the compressor 7COM with cooling water supplied through the pipe 12b. The refrigerant liquid condensed in the condenser 7C is returned to the evaporator 7E via the throttle.
[0034]
An example of the two-stage absorption refrigerator 3a used in the embodiment of the present invention will be described with reference to the flowchart of FIG. FIG. 4 illustrates a single-effect absorption refrigerator. In the single-effect absorption refrigerator, the temperature of the heat source is preferably 80 ° C. or higher, depending on the temperature of the desired cold water. Since the temperature of the hot water supplied from the fuel cell 2 and other waste hot water sources is usually about 50 to 80 ° C., it is difficult for a single-effect absorption refrigerator to obtain cold water of a very low temperature. In a two-stage absorption refrigerator, relatively low-temperature hot water can be used as a heat source.
[0035]
The two-stage absorption refrigerator 3a includes an evaporator Ea, a low-pressure absorber AL, a high-pressure absorber AH, a low-pressure regenerator GL, a high-pressure regenerator GH, a condenser Ca, a low-pressure solution heat exchanger 10L, a high-pressure solution heat exchanger 10H, It is configured to include a low-pressure solution pump 11L and a high-pressure solution pump 11H.
[0036]
The configuration of the two-stage absorption refrigerator 3a will be described. The evaporator Ea and the low-pressure absorber AL communicate with each other so that the refrigerant gas flows. The low pressure absorber AL is connected to the low pressure regenerator GL via a low pressure dilute solution pipe. In the low-pressure dilute solution pipe, a low-pressure solution pump 11L and a low-pressure solution heat exchanger 10L are inserted and arranged in this order from the low-pressure absorber AL side.
[0037]
The low-pressure regenerator GL and the low-pressure absorber AL are connected by a low-pressure concentrated solution pipe, and a low-pressure solution heat exchanger 10L is inserted into the low-pressure concentrated solution pipe.
[0038]
Further, the low-pressure regenerator GL and the high-pressure absorber AH are connected so that the refrigerant gas flows. The high pressure absorber AH is connected to the high pressure regenerator GH via a high pressure dilute solution pipe. In the high-pressure dilute solution pipe, a high-pressure solution pump H and a high-pressure solution heat exchanger 10H are inserted and arranged in this order from the high-pressure absorber AH side.
[0039]
The high-pressure regenerator GH and the high-pressure absorber AH are connected by a high-pressure concentrated solution pipe, and a high-pressure solution heat exchanger 10H is inserted into the high-pressure concentrated solution pipe.
[0040]
The high-pressure regenerator GH and the condenser Ca communicate with each other so that the refrigerant gas flows. The condenser Ca is connected to the evaporator Ea by a refrigerant pipe.
[0041]
Each of the evaporator Ea, the low-pressure absorber AL, the high-pressure absorber AH, the low-pressure regenerator GL, the high-pressure regenerator GH, and the condenser Ca has a heat transfer tube.
[0042]
The hot water pipe 13b from the heat source supplies hot water to the low-pressure regenerator GL and the high-pressure regenerator GH in parallel, and the hot water is used for heating the solution.
[0043]
The operation of the two-stage absorption refrigerator 3a will be described with reference to the flowchart of FIG. Refrigerant vapor evaporated by removing heat from the cold water flowing through the cold water heat transfer tube in the evaporator Ea is absorbed by the solution cooled by the cooling water 15 in the low-pressure absorber AL. The cold water is supplied through the pipe 14b, and the cooled cold water is returned to the refrigeration load through the pipe 14.
[0044]
The dilute solution having absorbed the refrigerant and having a reduced concentration of the absorbent is sent to the low-pressure solution heat exchanger 10L by the low-pressure solution pump 11L, where it exchanges heat with the high-temperature concentrated solution returned from the low-pressure regenerator GL, and the temperature rises. Into the low-pressure regenerator GL. In the low-pressure regenerator GL, the solution is heated by the heat medium (here, hot water) supplied through the pipe 13b, and the refrigerant is discharged and concentrated. The concentrated solution recovers heat in 10 L of the low-pressure solution heat exchanger, and its temperature decreases to return to the low-pressure absorber AL. The hot water whose temperature has decreased is returned to the heat source through the pipe 13.
[0045]
On the other hand, the refrigerant vapor generated in the low-pressure regenerator GL is absorbed by the solution cooled by the cooling water supplied through the pipe 18b in the high-pressure absorber AH. The dilute solution in which the concentration of the absorbent has been reduced by absorbing the refrigerant is sent to the high-pressure solution heat exchanger 10H by the high-pressure solution pump 11H, where it exchanges heat with the high-temperature concentrated solution returned from the high-pressure regenerator GH, and is heated. Into the high-pressure regenerator GH. The cooling water whose temperature has risen in the high-pressure absorber AH is returned to the cooling tower through the pipe 18.
[0046]
In the high-pressure regenerator GH, the solution is heated by the heat medium (here, hot water) supplied through the pipe 13b, and the refrigerant is discharged and concentrated. The concentrated solution recovers heat in the high-pressure solution heat exchanger 10H, lowers the temperature, and returns to the high-pressure absorber AH. The refrigerant vapor generated in the high-pressure regenerator GH is cooled by the cooling water supplied through the pipe 18b in the condenser Ca, condensed, returns to the evaporator Ea, and goes through a cycle. The hot water whose temperature has decreased in the high-pressure regenerator GH is returned to the heat source through the pipe 13, and the cooling water whose temperature has increased in the condenser Ca is returned to the cooling tower through the pipe 18.
[0047]
The two-stage absorption refrigerator has a low-pressure absorber AL, a high-pressure absorber AH, and a low-pressure regenerator GL and a high-pressure regenerator GH. is there. Therefore, operation using hot water from a waste hot water source such as a fuel cell as a heat source is possible.
[0048]
As described above, in the embodiment of the present invention, the hot water in the hot water storage tank 1 is heated by the exhaust heat of the fuel cell 2 and the condensation heat of the electric compression refrigerator 7. The hot water in the hot water storage tank 1 is heated by the solar heat collector 8. The absorption refrigerator 3 is operated using the hot water tank 1 as a heat source. Hot water supply and heating are performed from the hot water tank 1. The water supply to the hot water storage tank 1 is preheated by the absorption heat and the condensation heat of the absorption refrigerator 3. The heat radiation of the fuel cell 2 is performed by the cooling tower 5.
[0049]
As described above, according to the embodiment of the present invention, the fuel cell 2, the absorption refrigerator 3, the electric compression refrigerator 7, the hot water storage tank 1, the cooling tower 5, and the solar heat collector 8 co-generate (cogeneration) system. Is configured. This system is particularly suitable as a cogeneration system combining a fuel cell and an absorption refrigerator for ordinary households. According to the embodiment of the present invention, it is possible to solve the imbalance between the power demand and the heat demand, and to effectively use energy.
By supplying the condensation heat of the electric compression refrigerator to the hot water storage tank for storing the exhaust heat from the fuel cell, it is possible to increase the amount of cold heat of the absorption refrigerator using the hot water storage tank as a heat source, It is possible to efficiently solve the imbalance between demand and heat demand, and to effectively use heat energy. Furthermore, by making the heat flow between each device and the hot water storage tank in both directions, miscellaneous exhaust heat and solar heat can be effectively used.
[0050]
Further describing the embodiment of the present invention,
(1) The application of this system is not limited to ordinary households, but may be business use.
(2) What is stored in the hot water storage tank 1 is not limited to hot water, but may be another heat medium.
(3) The absorption refrigerator 3 is not limited to the single effect type, but may be a double effect type, a double effect type, a two-stage absorption type, or the like.
(4) The working medium of the absorption refrigerator 3 is not limited to lithium bromide and water, but water may be used as an absorbent and ammonia may be used as a refrigerant, or another absorbent and refrigerant may be used.
(5) The water heater 4 is not limited to this, and may be any heat load, typically a hot water load, and may be, for example, a heating device.
(6) The cooling tower 5 typically evaporates water to lower the temperature of the remaining water, but is not limited thereto, and may be an air-cooled heat exchanger.
(7) The indoor air conditioner 6 is not limited to a cooling indoor unit, but may be a refrigeration load, and may be, for example, a refrigerator / refrigerator or a showcase.
(8) The electric compression refrigerator 8 may be driven by an AC motor or a DC motor, but when driven by a DC motor, there is no need to convert DC power generated by the fuel cell 2 into AC. Since the loss generated at that time can be eliminated, the input energy can be used more efficiently. The same applies to auxiliary pumps of the absorption refrigerator 3 and electric motors such as fans and pumps of the cooling tower 5.
(9) When the hot water load is, for example, a bathtub, tap water supplied to the hot water tank 1 may be preheated by drainage from the bathtub.
(10) The number of devices is not limited to one and may be plural.
[0051]
【The invention's effect】
As described above, according to the present invention, since the hot water storage tank for storing the exhaust heat from the fuel cell is provided, the fuel cell can be operated regardless of the cold heat demand, and the operation using the heat stored in the hot water tank as the heat source Since it is equipped with an absorption chiller that generates cold and supplies the cold to the cold demand, it is possible to supply cold to the cold demand regardless of the amount of power generated by the fuel cell. Since a cooling tower that dissipates exhaust heat is provided, it is possible to generate electricity even when the hot water tank is full, and to generate heat while supplying heat to the hot water tank, and to supply the cold heat to a cold heat demand destination. Since the refrigerator is provided, it is possible to provide an absorption refrigeration system that can efficiently compensate for the amount of cold heat when the amount of cold generated by the absorption refrigerator is insufficient.
[Brief description of the drawings]
FIG. 1 is a flowchart of an absorption refrigeration system according to a first embodiment of the present invention.
FIG. 2 is a flowchart of an absorption refrigeration system according to a second embodiment of the present invention.
FIG. 3 is a flowchart showing an example of a fuel cell used in the embodiment of the present invention.
FIG. 4 is a flowchart showing an example of a single-effect absorption refrigerator used in the embodiment of the present invention.
FIG. 5 is a flowchart showing an example of a compression refrigerator used in the embodiment of the present invention.
FIG. 6 is a flowchart showing an example of a two-stage absorption refrigerator used in the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Fuel cell 2a Fuel cell stack 2b Reformer 3 Absorption refrigerator 3A Absorber 3C Condenser 3E Evaporator 3G Regenerator 3a Two-stage absorption refrigerator 4 Water heater 5 Cooling tower 6 Indoor air conditioner 7 Electric compression refrigeration Machine 7C Condenser 7E Evaporator 7COM Compressor 8 Solar heat collector 9 Heat exchangers 11a, 12a, 13a, 14a, 16a, 18a21a Pump

Claims (2)

A hot water tank for storing waste heat from a fuel cell that generates power by an electrochemical reaction between a fuel containing hydrogen as a main component and an oxidant;
An absorption refrigerator that operates using the heat stored in the hot water storage tank as a heat source, generates cold heat, and supplies the cold heat to a cold heat demand destination;
A cooling tower for dissipating exhaust heat from the fuel cell or the absorption refrigerator;
A compression refrigerator that generates cold heat while supplying heat to the hot water storage tank and supplies the cold heat to a cold heat demand destination;
Absorption refrigeration system. The absorption refrigeration system according to claim 1, wherein the absorption chiller is a two-stage absorption chiller.

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