JP2009264613A - Chemical heat storage system for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chemical heat storage system for a vehicle, capable of sufficiently supplying steam to a reactor from an evaporating section, under a low-temperature environment. <P>SOLUTION: This chemical heat storage system 10 for the vehicle comprises the reactor 16, incorporating a chemical heat storage material storing heat by dehydration reaction by the heat supplied from the vehicle and radiating heat through hydration reaction, and an evaporator-condenser 30 for supplying the steam for the hydration reaction to the reacting section 16, by making the water evaporate through heat exchange with an air-conditioner refrigerant. A heat medium flow channel 38 of the evaporator-condenser 30 between a compressor 64 and a condenser 66 is communicated in an air-conditioner refrigerant circulation passage 74 of an air-conditioning device 62 for the vehicle, so that the heat of low level is lifted up by an evaporator 72, and the water is evaporated by the air-conditioner refrigerant, of which the temperature is risen due to the compressor 64. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular chemical heat storage system for effectively using heat generated with traveling of a vehicle.

There is known a chemical heat pump container in which a chemical heat storage reactor filled with a chemical heat storage material and an evaporating and condensing part storing water are communicated with each other through a pipe and a valve (for example, see Patent Document 1).
JP 2008-25853 A

  However, in the conventional technology as described above, the water in the evaporative condensation unit is evaporated by the pressure difference between the chemical heat storage reactor and the evaporative condensing unit during heat radiation, and the water vapor generated thereby is converted into the water in the chemical heat storage reactor. Since it is a structure used for the sum reaction, there is a concern that the water vapor pressure (amount) supplied to the chemical heat storage reactor is insufficient particularly during heat dissipation in a low temperature environment.

  In view of the above fact, an object of the present invention is to obtain a vehicle chemical heat storage system that can sufficiently supply water vapor from an evaporation section to a reactor in a low temperature environment.

  A chemical heat storage system for a vehicle according to the first aspect of the invention includes a reactor in which a chemical heat storage material that stores a heat by performing a dehydration reaction by supplying heat from a vehicle and dissipates heat by a hydration reaction, and the reactor Refrigerant flowing between the compressor and the condenser in the refrigerant circulation path of the air conditioner for the vehicle that circulates the refrigerant through the condenser, the evaporator, the compressor, the condenser, and the expansion valve. And an evaporation section that evaporates water by heat exchange with the refrigerant, and supplies water vapor for the hydration reaction to the reaction section.

  In the chemical heat storage system for a vehicle according to claim 1, the chemical heat storage material of the reactor stores heat while generating a dehydration reaction by receiving heat supply from a heat source of the vehicle. The water vapor generated by this dehydration reaction is condensed in the condensing part. When releasing the heat stored in the chemical heat storage material, the compressor of the vehicle air conditioner is operated to execute the air conditioner cycle. Then, heat is pumped up from the air (for example, the atmosphere) in the evaporator, and the temperature of the refrigerant is raised by the principle of an air conditioner cycle (compression / expansion heat pump). Then, in the evaporation section, the water is evaporated by heat exchange between the refrigerant and the water whose temperature has been increased as described above, and the generated water vapor is supplied into the reactor (chemical heat storage material). As a result, a hydration reaction of the chemical heat storage material occurs, and the heat stored in the chemical heat storage material is released.

  Here, since the vehicle chemical heat storage system is configured to secure the latent heat of vaporization in the evaporation unit by using the vehicle air conditioner as a heat pump, for example, compared with a configuration in which water is evaporated at an environmental temperature, evaporation is performed. The water vapor pressure (amount) supplied from the part to the reaction part can be increased.

  Thus, in the vehicle chemical heat storage system according to the first aspect, water vapor can be sufficiently supplied from the evaporation section to the reactor in a low temperature environment. Moreover, water vapor can be sufficiently supplied from the evaporation section to the reactor in a low temperature environment without providing a dedicated heat pump in the vehicle chemical heat storage system.

  The chemical heat storage system for vehicles according to the invention of claim 2 is the chemical heat storage system for vehicles according to claim 1, wherein the chemical heat storage material space in which the chemical heat storage material in the reactor is incorporated, and the evaporation section The portion communicating with the chemical heat storage material space is sealed in a reduced pressure state relative to the atmospheric pressure.

  In the vehicular chemical heat storage system according to the second aspect, since the communication portion between the reactor and the evaporation section, that is, the water vapor movement range is reduced, evaporation of water in the evaporation section is promoted.

  A chemical heat storage system for a vehicle according to a third aspect of the present invention is the chemical heat storage system for a vehicle according to the first or second aspect, wherein the heat flowing between the air flowing inside and the chemical heat storage material of the reactor can be exchanged. 1 heat exchanging part and a second heat exchanging part capable of exchanging heat between the air flowing inside and the object to be heated, and guiding the air that has passed through the second heat exchanging part to the air flow path of the evaporator And a heated air circulation structure.

  In the vehicle chemical heat storage system according to claim 3, when the chemical heat storage material of the reactor generates heat, the heat is transmitted to the air flowing in the heated air circulation structure in the first heat exchange section, and is heated in the second heat exchange section. Subject to subject heating. Further, the heated air to be heated is supplied to the air flow path of the evaporator. Since this air becomes high temperature as the temperature of the object to be heated rises, it contributes to the heating of the evaporator. Thereby, the frost formation of this evaporator accompanying pumping up heat with an evaporator in a low-temperature environment is suppressed or prevented.

  A chemical heat storage system for a vehicle according to a fourth aspect of the present invention is the chemical heat storage system for a vehicle according to the third aspect, wherein the heated air flow structure is configured to exchange the air that has passed through the air flow path of the evaporator with the first heat exchange. It is comprised so that it may lead to a part.

  In the chemical heat storage system for a vehicle according to claim 4, air for heating the heating object is circulated in the order of the first heat exchange part (reactor), the second heat exchange part (heating object), and the evaporator. Frosting suppression and effective use of heat dissipated from the chemical heat storage material.

  A vehicle chemical heat storage system according to a fifth aspect of the present invention is the vehicle chemical heat storage system according to any one of the first to fourth aspects, wherein the vehicle air conditioner is provided with the evaporator, the compressor, And a refrigerant bypass structure that can circulate the refrigerant by bypassing the expansion valve, and the condenser can exchange heat with the refrigerant circulated by bypassing the evaporator, the compressor, and the expansion valve by the refrigerant bypass structure. The water vapor flowing from the reactor is condensed by heat exchange with the refrigerant.

  In the chemical heat storage system for a vehicle according to claim 5, heat generated in the chemical heat storage material of the reactor, that is, water vapor generated by a dehydration reaction is guided to the condensing unit, and the water vapor is exchanged by heat exchange between the water vapor and the refrigerant in the condensing unit. Is condensed. At this time, the refrigerant bypasses the evaporator, the compressor, and the expansion valve by the refrigerant bypass structure, so that the refrigerant is circulated between the condenser and the condenser. Thereby, the condensation heat imparted to the refrigerant by the condenser is dissipated in the condenser, and the dehydration reaction is maintained.

  Thus, since this vehicle chemical heat storage system is configured to dissipate the heat of condensation in the condensing unit using the condenser of the vehicle air conditioner as a radiator, a dedicated heat dissipation system for the vehicle chemical heat storage system is provided. A dehydration reaction, that is, a heat storage state can be maintained without providing a (refrigerant circulation system).

  A chemical heat storage system for a vehicle according to a sixth aspect of the present invention is the chemical thermal storage system for a vehicle according to the fifth aspect, wherein the refrigerant bypass structure includes a bypass passage that communicates the upstream side and the downstream side of the condenser; A pump provided in the bypass flow path, and a flow path switching device capable of switching between a normal state where the refrigerant does not flow through the bypass flow path and a bypass state where the refrigerant selectively flows through the bypass flow path. It is configured.

  The vehicle chemical heat storage system according to claim 6 is a simple configuration in which a bypass flow path, a pump, and a flow path switching device are provided in the vehicle air conditioner, and the refrigerant is supplied to the condenser and the condensing unit during heat storage. A configuration capable of switching to a circulating state can be realized.

  The vehicular chemical heat storage system according to claim 7 is the vehicular chemical heat storage system according to claim 5 or 6, wherein the evaporating part and the condensing part are evaporative condensation in which the water or water vapor exists. The space and the refrigerant flow path through which the refrigerant flows are integrally configured as an evaporator / condenser provided so that heat exchange between the water or water vapor and the refrigerant is possible.

  In the chemical heat storage system for a vehicle according to claim 7, the evaporating unit and the condensing unit that function by exchanging heat with the refrigerant of the vehicle air conditioner share at least a part of the evaporative condensing space and the refrigerant flow path. Therefore, the structure as an evaporator / condenser and the structure of the system are simple.

  A chemical heat storage system for a vehicle according to an eighth aspect of the invention is the chemical thermal storage system for a vehicle according to any one of the fifth to seventh aspects, wherein the thermal storage state of the reactor in the chemical thermal storage material is detected. And a control device that controls the refrigerant bypass structure so that the refrigerant circulates bypassing the evaporator, the compressor, and the expansion valve in the heat storage state.

  In the chemical heat storage system for a vehicle according to claim 8, the control device controls the refrigerant bypass structure and detects the refrigerant between the condenser and the condenser when detecting the heat storage state of the reactor in the chemical heat storage material. Circulate. Thereby, even when the heat storage operation occurs intermittently, each heat storage operation is maintained, and when the heat is not stored, the vehicle air conditioner can be used for air conditioning.

  A chemical heat storage system for a vehicle according to a ninth aspect of the invention is the chemical heat storage system for a vehicle according to any one of the first to eighth aspects, wherein the required heat release is performed when the chemical heat storage material dissipates heat. The apparatus further includes a control device that detects the amount of heat, obtains the flow rate of the refrigerant so that water vapor for releasing the detected amount of heat is supplied from the evaporator to the reactor, and controls the compressor.

  The chemical heat storage system for a vehicle according to claim 9, wherein the control means controls the compression so that only an amount (pressure) of water vapor corresponding to the required heat release detected by the control means is supplied from the evaporation section to the reactor. To do. Thereby, it is possible to dissipate heat from the chemical heat storage material by the required heat release amount, and effective use of the heat storage to the chemical heat storage material is achieved.

  As described above, the vehicle chemical heat storage system according to the present invention has an excellent effect that water vapor can be sufficiently supplied from the evaporation section to the reactor in a low temperature environment.

  A vehicular chemical heat storage system 10 according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a schematic system configuration diagram showing a schematic overall configuration of a vehicular chemical heat storage system 10. As shown in this figure, the vehicular chemical heat storage system 10 includes a reactor 16 in which a chemical heat storage material (not shown) is filled in a reaction channel 14 as a space for a chemical heat storage material in a container 12. . The chemical heat storage material constituting the reactor 16 stores heat (absorbs heat) with dehydration and dissipates heat (heat generation) with hydration (restoration to calcium hydroxide).

In this embodiment, calcium hydroxide (Ca (OH) ₂ ), which is one of alkaline earth metal hydroxides, is employed as the chemical heat storage material. Therefore, in the reactor 16, it is set as the structure which can reversibly repeat heat storage and heat dissipation by the reaction shown below.
Ca (OH) ₂ Ｃａ CaO + H ₂ O

When the heat storage amount and the heat generation amount Q are shown together in this equation,
Ca (OH) ₂ + Q → CaO + H ₂ O
CaO + H ₂ O → Ca (OH) ₂ + Q
It becomes. The heat storage capacity per kg of this chemical heat storage material (Ca (OH) ₂ ) is about 1.86 [MJ / kg-Ca (OH) ₂ ].

  Furthermore, in this embodiment, in the container 12 of the reactor 16, a heat medium flow path 18 for supplying heat to the chemical heat storage material, and a refrigerant flow for transporting the heat from the chemical heat storage material to the heating target. A path 20 is provided. The heat medium flow path 18 and the refrigerant flow path 20 are adjacent to the reaction flow path 14 (not shown) so that heat exchange between the heat medium and the refrigerant flowing through the inside and the chemical heat storage material in the reaction flow path 14 is possible. Is provided.

  A heat medium line 22 is connected to the heat medium flow path 18. An upstream side of the heat medium flow path 18 in the heat medium line 22 is connected to a heat source of an automobile to which the vehicle chemical heat storage system 10 is applied. The downstream end 22 </ b> A of the heat medium line 22 is an atmosphere open end.

  In this embodiment, at least one of exhaust gas from the internal combustion engine EG and air heated by the electric heater EH is employed as the heat medium. The electric heater EH is employed when, for example, an automobile to which the vehicle chemical heat storage system 10 is applied is an electric vehicle or a hybrid vehicle having an electric motor as a drive source, and is operated by surplus power that cannot charge the battery. can do. Examples of the surplus power include an amount corresponding to regenerative energy associated with vehicle deceleration, and an amount corresponding to an excess power generation amount associated with load fluctuation in a configuration in which a power generation device such as a fuel cell is mounted.

  On the other hand, a heat transport line 24 is connected to the refrigerant flow path 20. A blower 26 is provided on the upstream side of the refrigerant flow path 20 in the heat transport line 24, and heat from the heating target 28 by the vehicle chemical heat storage system 10 is disposed on the downstream side of the refrigerant flow path 20 in the heat transport line 24. An exchange unit is provided. Thereby, in the chemical heat storage system 10 for vehicles, it is set as the structure which can use for the heating (warming-up) of the heating object 28 the heat which the chemical heat storage material thermally radiated in the reactor 16. The downstream end of the heat transport line 24 is an atmospheric open end 24A. Examples of the heating object 28 include an internal combustion engine EG, an exhaust catalyst for purifying exhaust gas of the internal combustion engine EG, and a battery for controlling a battery for driving a motor. It is good also as a structure which selects some heating objects.

  The vehicular chemical heat storage system 10 functions as a condensing unit that condenses the water vapor introduced from the reaction flow path 14 of the reactor 16 and an evaporating unit that generates water vapor by evaporating the water and supplying the water to the reactor 16. The evaporator / condenser 30 is also provided. The evaporator / condenser 30 includes an evaporation condensing chamber 34 communicated with the reaction channel 14 of the reactor 16 via a water vapor circulation line 32, a refrigerant channel 36 for condensing water vapor in the evaporation condensing chamber 34, A heat medium flow path 38 for evaporating water in the evaporative condensation chamber 34 is formed in the container 40. The heat medium flow path 38 and the refrigerant flow path 36 are adjacent to the evaporative condensation chamber 34 (not shown) so that heat can be exchanged between the heat medium, the refrigerant, and the water or water vapor in the evaporative condensation chamber 34. Is provided.

  The evaporation condensing chamber 34 is evacuated together with the water vapor circulation line 32 and the reaction flow path 14 of the reactor 16. The water vapor circulation line 32 is provided with an on-off valve 42 for switching communication between the evaporative condensation chamber 34 and the reaction flow path 14. Further, the lower portion in the gravity direction in the evaporative condensation chamber 34 is communicated with the water tank 46 through the water circulation line 44. The water circulation line 44 is provided with a water pump 48 and an on-off valve 50. The water tank 46 stores water condensed in the evaporative condensation chamber 34 as water for evaporating in the evaporative condensation chamber 34. The water pump 48 operates to supply water in the water tank 46 to the evaporative condensation chamber 34.

  A refrigerant circulation line 52 is connected to the refrigerant flow path 36. A sub-radiator 54 and a refrigerant pump 56 are provided in the refrigerant circulation line 52 in series with the refrigerant flow path 36. Thus, when the refrigerant pump 56 is operated, the refrigerant circulates through the refrigerant flow path 36 and the sub radiator 54, and the heat of condensation of water vapor in the refrigerant flow path 36 is radiated by the sub radiator 54. That is, in the chemical heat storage system 10 for a vehicle, it can be understood that a condenser cooling system 58 for maintaining condensation from water vapor to water in the refrigerant flow path 36 constituting the evaporator / condenser 30 is configured. it can. The condenser cooling system 58 includes a fan 55 for guiding heat radiation air (outside air) to the sub radiator 54.

  The vehicular chemical heat storage system 10 includes an evaporator heating system 60 for applying evaporation heat for evaporating water in the refrigerant flow path 36 of the evaporator / condenser 30, and the evaporator heating system 60. Is configured using an automotive vehicle air conditioner 62 to which the vehicle chemical heat storage system 10 is applied. This will be specifically described below.

  The vehicle air conditioner 62 includes a compressor 64, a condenser 66, a gas-liquid separator 68, an expansion valve 70, an evaporator 72, and an air conditioner refrigerant circulation path 74 that communicates them in series. The vehicle air conditioner 62 is configured such that an air conditioner cycle that is a compression / expansion heat pump cycle is executed by circulating air conditioner refrigerant in the order of the compressor 64, the condenser 66, the expansion valve 70, and the evaporator 72. Yes. In this embodiment, R-134a is used as the air conditioner refrigerant.

  Specifically, the air-conditioner refrigerant is compressed by the compressor 64 to be a high-pressure gas phase, condensed by the condenser 66 to be a high-pressure liquid phase, expanded by the expansion valve 70 to be a low-pressure liquid phase, and air-conditioned by the evaporator 72. The evaporator 72 is configured to cool the air-conditioning air by repeating an air-conditioning cycle that is made into a low-pressure gas phase by being evaporated by heat exchange with the working air.

  That is, the evaporator 72 is a heat exchanger having an air conditioner refrigerant flow path 72A and an air flow path 72B, and air conditioning air (outdoor air or air supplied from the blower 76 through the air duct 78 to the air flow path 72B. The air-conditioning air is cooled by removing the latent heat of vaporization of the air-conditioner refrigerant flowing through the air-conditioner refrigerant flow path 72A from the room air). The air duct 78 is branched into an indoor duct 78A that guides air for air conditioning into the passenger compartment on the downstream side of the evaporator 72 and an exhaust duct 78B that guides air to the outside of the passenger compartment. A switching damper 75 is provided at the branched portion. ing.

  The condenser 66 is a heat exchanger between the outside air and the air conditioner refrigerant, and is configured to release the heat of condensation of the air conditioner refrigerant into the airflow generated by the operation of the vehicle running wind and the fan 80. In this embodiment, the compressor 64 employs an electric compressor that can operate independently of the applied automobile internal combustion engine.

  In the vehicle chemical heat storage system 10, a portion between the compressor 64 and the condenser 66 in the air conditioner refrigerant circulation path 74 constituting the vehicle air conditioner 62 is connected to the heat medium passage 38 of the evaporator / condenser 30. ing. Thereby, in the chemical heat storage system 10 for vehicles, it is set as the structure which evaporates water in the evaporative condensation chamber 34, and uses air-conditioner refrigerant as a heat medium, and obtains water vapor | steam. In this embodiment, when water is evaporated in the evaporating / condensing chamber 34 of the evaporating / condensing unit 30, heat exchange in the condenser 66 is omitted as will be described later (the automobile is not running and the fan 80 is inoperative). Is configured). As a result, the evaporator / condenser 30 is configured to dissipate heat (heat exchange) from a relatively high-temperature air-conditioner refrigerant to water.

  Further, as shown in FIG. 2, the vehicle chemical heat storage system 10 includes a heat storage ECU 82 as a control device. The heat storage ECU 82 is electrically connected to each of the on-off valves 42 and 50, the blowers 26 and 76, the water pump 48, the refrigerant pump 56, the compressor 64, the fans 55 and 80, and the switching damper 75, and controls these operations. It is supposed to be.

  The heat storage ECU 82 is supplied with a signal corresponding to the driving state of the vehicle applied from a start switch (operation control ECU or main controller) (not shown) of the vehicle. Further, the heat storage ECU 82 is an outside air temperature sensor 84 that outputs a signal according to the outside air temperature (environment temperature), a target temperature sensor 86 that outputs a signal according to the temperature of the heating target, and the temperature fluctuation of the chemical heat storage material of the reactor 16. Are electrically connected to each of the chemical heat storage material temperature sensors 88 that output signals corresponding to. The control by the heat storage ECU 82 will be described together with the operation of the present embodiment.

  Next, the operation of the first embodiment will be described. In FIG. 3 showing the operation of the vehicular chemical heat storage system 10, the thick solid line shows the flow of fluid such as water, water vapor, and each heat medium, and the imaginary line shows the line without flow, and the white line The arrow indicates heat transfer, and the black valve port indicates a closed flow. Further, in FIG. 3, illustration of components that are not involved in the mode to be described may be omitted.

  In an automobile to which the vehicle chemical heat storage system 10 having the above configuration is applied, for example, when using air conditioning in summer, the vehicle air conditioner 62 is operated as shown in FIG. That is, the air conditioner refrigerant executes the air conditioner cycle in which the air conditioner refrigerant circulates in the air conditioner refrigerant circulation path 74 in the order of the compressor 64, the condenser 66, the gas-liquid separator 68, the expansion valve 70, and the evaporator 72. The blower 76 is operated in the state switched to. As a result, the evaporator 72 takes away the latent heat of vaporization of the air-conditioner refrigerant from the air-conditioning air, and the cooled air-conditioned air is guided into the passenger compartment.

  Control of the heat storage ECU 82 of the vehicle chemical heat storage system 10 applied to this automobile will be described with reference to the flowchart shown in FIG. As shown in this flowchart, in step S10, the heat storage ECU 82 determines whether or not a vehicle operation state (including stop and parking state) heat radiation mode is requested. When determining that the heat dissipation mode is not requested, the heat storage ECU 82 proceeds to step S12 and determines whether the heat storage mode is required. If it is determined that the heat storage mode is not required, the heat storage ECU 82 returns to step S10, and if it is determined that the heat storage mode is required, the heat storage ECU 82 proceeds to step S14.

  In step S14, the heat storage ECU 82 detects the heat storage operation. That is, the introduction of exhaust gas from the internal combustion engine EG or the introduction of heated air by EH is detected (confirmed). The operation of introducing the exhaust gas from the internal combustion engine EG or the operation of introducing the heated air by the EH may be performed according to a command from the heat storage ECU 82 or may be performed by a margin from another controller. Next, the heat storage ECU 82 proceeds to step S16, and as shown in FIG. 3C, the on-off valves 42 and 50 are opened, and the refrigerant pump 56 and the fan 55 of the condenser cooling system 58 are operated. Accordingly, the refrigerant circulates in the refrigerant circulation line 52 in the order of the sub radiator 54 and the evaporator / condenser 30.

  Thereby, in the reactor 16, the chemical heat storage material in the reaction flow path 14 undergoes a dehydration reaction by the heat supplied from the internal combustion engine EG or the electric heater EH, and heat storage to the chemical heat storage material is performed. When the water vapor generated by the dehydration reaction of the chemical heat storage material is introduced into the evaporation / condensation chamber 34 of the evaporation / condenser 30 via the water vapor circulation line 32, It is condensed by heat exchange and collected in the water tank 46 by gravity. The refrigerant heated by heat exchange with water vapor is cooled by exchanging heat with the outside air by the sub radiator 54. Thereby, the heat storage operation in the reactor 16 is maintained.

  In this heat storage mode, when receiving the heat of condensation of approximately 1 [kW] for condensing water vapor at approximately 37 ° C., if the refrigerant flow rate is 10 [NL / min], the sub-radiator 54 dissipates approximately 1 [kW]. It is confirmed that it will be fulfilled. In this example, for example, the refrigerant temperature is 22 ° C. at the inlet of the refrigerant flow path 36 and the refrigerant temperature is 23.5 ° C. at the outlet of the refrigerant flow path 36. The power of the refrigerant pump 56 is approximately 80 [W], and the power of the fan 55 can be ignored.

  The heat storage ECU 82 proceeds to step S18 and determines whether or not the heat storage in the reactor 16 is completed. For example, based on the signal from the chemical heat storage material temperature sensor 88, the completion of the heat storage is determined based on whether or not a temperature rise (sensible heat) of a predetermined value or more of the chemical heat storage material is detected. When it is determined that the heat storage is not completed, the heat storage ECU 82 returns to step S16, and when it is determined that the heat storage is completed, the heat storage ECU 82 proceeds to step S20. In step S20, the heat storage ECU 82 closes the on-off valves 42 and 50, stops the refrigerant pump 56 and the fan 55 of the condenser cooling system 58, and ends the heat storage mode.

  On the other hand, if it is determined in step S10 that the heat dissipation mode is required, the heat storage ECU 82 proceeds to step S22. That is, the heat dissipation mode is selected. In step S22, the heat storage ECU 82 detects the required heat amount (W) of the heating object 28. This required heat quantity is obtained by calculation or a map or the like based on the heat capacity of the heating object 28 set (stored), the temperature after the temperature of the heating object 28 is raised, the temperature raising time, the current temperature of the heating object 28, and the like.

  Next, the heat storage ECU 82 proceeds to step S24, and calculates a hydration reaction amount (W) for releasing heat to the reactor 16 (chemical heat storage material) by the required heat amount. Next, the heat storage ECU 82 proceeds to step S26, and calculates the latent heat of vaporization (W) required for the evaporator / condenser 30 to generate an amount of water vapor necessary for the hydration reaction of step S24. This latent heat of vaporization is calculated based on the outside air temperature and the like.

Then, the heat storage ECU 82 proceeds to step S28, and calculates the flow rate (m ³ / s or kg / s) of the air-conditioner refrigerant necessary for applying the latent heat of vaporization obtained in step S26 to the evaporator / condenser 30. Next, the heat storage ECU 82 opens the on-off valves 42 and 50 and operates the water pump 48 and the blowers 26 and 76, respectively, in step S30, as shown in FIG. The switching damper 75 is switched to the exhaust duct 78B side. Further, the heat storage ECU 82 maintains the fan 80 in a state where it is not operated.

  Next, the heat storage ECU 82 proceeds to step S32, and controls the compressor 64 so that the air conditioner refrigerant circulates in the air conditioner refrigerant circulation path 74 by the required flow rate of the air conditioner refrigerant obtained in step S28. Thereby, in the chemical heat storage system 10 for vehicles, an air-conditioner refrigerant circulates through the air-conditioner refrigerant circulation path 74 as shown in FIG. The air-conditioner refrigerant draws heat from air, which is a low-temperature heat source, in the evaporator 72 and is heated by compression by the compressor 64. In this heat dissipation mode, since the fan 80 is stopped, the evaporator / condenser 30 functions as a condenser.

  That is, in the vehicle chemical heat storage system 10, the air-conditioner refrigerant heated as described above is heated with the water supplied from the water tank 46 to the evaporation condensation chamber 34 in the heat medium passage 38 of the evaporator / condenser 30. It is used for exchange (giving condensation heat). Thereby, water vapor is supplied from the evaporative condensation chamber 34 to the reaction flow path 14 of the reactor 16, and the chemical heat storage material in the reaction flow path 14 undergoes a hydration reaction and dissipates heat along with the hydration reaction. This heat is transported to the heating object 28 by the air flowing through the heat transport line 24 by the blower 26 and contributes to heating (warming up) of the heating object 28.

  This heat dissipation mode will be supplemented based on the operation example shown in FIG. FIG. 5 shows a cycle of the vehicle air conditioner 62 in the heat dissipation mode in a ph diagram. As shown in this figure, the pressure before and after the compressor 64 is about 0.155 [MPa], about 1.3 [MPa], the inlet temperature 263 [K] (−10 ° C.) of the evaporator 72, and the outlet temperature 268 of the evaporator 72. [K] (−5 ° C.), the inlet temperature of the heating medium flow path 38 of the evaporator / condenser 30 is about 328 [K] (55 ° C.), and the outlet temperature is about 323 [K] (50 ° C.). Become. In this case, the evaporator 72 pumps up the heat of Q1≈1010 [W], and the compressor 64 performs the work of Q2≈720 [W], so that Q3 = Q1 + Q2≈1730 [W] from the air conditioner refrigerant in the evaporator / condenser 30. It can be seen that the heat is applied. In this embodiment, when the required heat amount of the heating object 28 is 4100 [W], it is confirmed that the cycle is established by setting the flow rate of the air-conditioner refrigerant to approximately 30 [kg / h].

  Furthermore, the heat storage ECU 82 proceeds to step S34, and determines, for example, whether or not the heating of the heating target 28 has been completed based on a signal from the target temperature sensor 86. When it is determined that the heating of the heating object 28 has not been completed, the heat storage ECU 82 returns to step S32, and when it is determined that the heating of the heating object 28 has been completed, the heat storage ECU 82 proceeds to step S36. In step S36, the heat storage ECU 82 closes the on-off valves 42 and 50 and stops the water pump 48 and the blowers 26 and 76, respectively, and switches the switching damper 75 to the indoor duct 78A side. Thereby, the heat dissipation mode is terminated.

  Here, the chemical heat storage system 10 for a vehicle is configured to supply latent heat of evaporation when the evaporator / condenser 30 is used as an evaporator with an air-conditioner refrigerant pumped up from the outside air, and thus the evaporation condensation chamber 34. It is possible to effectively evaporate the water inside (supplemented later in comparison with a comparative example). Thereby, in the chemical heat storage system 10 for vehicles, the water vapor pressure (flow rate) supplied to the reaction flow path 14 of the reactor 16 from the evaporation condensation chamber 34 of the evaporator / condenser 30 can be secured even in a low temperature environment. The required heat dissipation amount (W) can be obtained. That is, for example, the heating object 28 can be heated to a required temperature when the applied automobile is started at a low temperature.

  As described above, the vehicular chemical heat storage system 10 can sufficiently supply water vapor from the evaporator / condenser 30 to the reactor 16 even in a low temperature environment. Moreover, in the chemical heat storage system 10 for a vehicle, the vehicle air conditioner is used as a heat pump to secure the latent heat of vaporization in the evaporation section, so that the reaction is performed only with the driving power of the compressor 64 without providing a new heat pump. The supply of water vapor to the vessel 16 can be ensured.

  Moreover, in the chemical heat storage system 10 for a vehicle, since the reaction flow path 14 of the reactor 16 and the evaporation condensation chamber 34 of the evaporator / condenser 30 are vacuum degassed, the evaporation of water is also promoted by this low pressure, and the evaporation The water in the condensation chamber 34 can be evaporated more effectively. That is, in the vehicle chemical heat storage system 10, the water vapor supply from the evaporator / condenser 30 to the reactor 16 can be further ensured in a low temperature environment.

  Further, as described above, in the vehicle chemical heat storage system 10 that obtains the latent heat of evaporation of water in the evaporator / condenser 30 by the heat pump, for example, compared with a comparative example in which the latent heat of evaporation of water in the evaporator / condenser 30 is obtained by heating with an electric heater. Thus, the heat increase ratio (= (available heat quantity) / (water latent heat of evaporation)), which is the ratio of the available heat quantity to the input heat quantity (power), is large.

  FIG. 6A shows an example in which water at 0 ° C. is evaporated and heat at 150 ° C. is obtained by a hydration reaction in the reaction channel 14. In this case, as shown in FIG. 6 (B), the heat radiated from the chemical heat storage material in the reaction channel 14 is partly as sensible heat for raising the water vapor from about 5 ° C. to 150 ° C. A part of the heat is used as sensible heat for raising the temperature of the chemical heat storage material itself and the container 12 to 150 ° C., and the remaining part becomes the available heat amount. On the other hand, as shown in FIG. 6C, it is assumed that all the heat input to the evaporator / condenser 30 is used as latent heat of evaporation of water.

  As shown in FIG. 7, assuming that the amount of heat available in the vehicle chemical heat storage system 10 and the comparative example is constant, in the comparative example, the latent heat of water evaporation (the amount of heating by the electric heater) is large. Is approximately 1.5. In contrast, the vehicle chemical heat storage system 10 uses a heat pump that draws heat from a lower heat source, so that the latent heat of vaporization of water can be ensured mainly by simply inputting the power of the compressor 64, and the heat increase ratio is It was confirmed that it was approximately 3.7, which was twice or more that of the comparative example.

  Furthermore, since the vehicle chemical heat storage system 10 uses the compression / expansion heat pump as described above, it is possible to adjust the amount of steam generated (pressure) in the evaporator / condenser 30 according to the power of the compressor 64. Become. Thereby, for example, it is possible to obtain a substantially constant heat radiation amount regardless of the outside temperature, or to vary the heat radiation temperature depending on the heating target. The heat radiation temperature depends on the water vapor pressure supplied to the reaction channel 14, and the heat radiation temperature increases as the water vapor pressure increases.

  Further, here, the heat storage ECU 82 constituting the vehicle chemical heat storage system 10 obtains the required heat release amount of the heating object 28 and controls the water vapor generation amount (hydration reaction amount) in the evaporator / condenser 30 based on this. Therefore, it is possible to dissipate heat from the chemical heat storage material of the reactor 16 by the required heat release amount. As a result, for example, only the necessary heat radiation amount that varies (changes) depending on the heating object 28, the initial temperature (environment temperature), etc. can be supplied to the heating object 28, and effective use of heat storage in the chemical heat storage material is achieved. It is done. In addition, the heat storage ECU 82 of the vehicle chemical heat storage system 10 controls the circulation amount of the air conditioner refrigerant in the vehicle air conditioner 62 (evaporator heating system 60) in accordance with the amount of water vapor generated as described above. The heating object 28 can be heated.

  Further, the heat storage ECU 82 constituting the vehicle chemical heat storage system 10 detects the heat storage operation and activates the condenser cooling system 58. Therefore, the heat of condensation of the water vapor in the evaporation condensation chamber 34 is released, and the evaporator / condenser is released. The temperature of 30 (evaporation condensation chamber 34) can be controlled. As a result, it is possible to prevent a decrease in the dehydration reaction in the reactor 16 due to an increase in pressure in the evaporation condensation chamber 34 (insufficient condensation) and freezing of the reaction water (condensation water) due to excessive cooling in the evaporation condensation chamber 34. .

  In particular, when the heat storage mode is intermittently executed, if the condenser cooling system 58 continues to be stopped, the dehydration reaction in the reactor 16 tends to decrease, and if the condenser cooling system 58 continues to operate, the reaction water Although freezing is likely to occur, in the vehicle chemical heat storage system 10, the heat storage ECU 82 detects the heat storage operation and operates the condenser cooling system 58 as described above, so that heat is stored well. Further, even in a configuration in which the introduction of exhaust gas from the internal combustion engine EG for heat storage or the introduction of heated air by EH is intermittently performed by another controller, the vehicle chemical heat storage system 10 has the above-described configuration. As described above, the heat storage ECU 82 detects the heat storage operation and operates the condenser cooling system 58, so that heat is stored well.

(Second Embodiment)
A vehicular chemical heat storage system 90 according to a second embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 shows a schematic overall system configuration of the vehicular chemical heat storage system 90 in a schematic system configuration diagram. As shown in this figure, a chemical heat storage system 90 for a vehicle has one end 92A connected to an exhaust duct 78B instead of the heat transport line 24 having one end connected to the blower 26 and the other end being an atmosphere open end 24A. In addition, according to the first embodiment, the other end 92 </ b> B includes a heat transport line 92 connected to the suction side of the blower 76 via the refrigerant flow path 20 and the heating target 28 of the reactor 16. It differs from the chemical heat storage system 10 for vehicles.

  The heat transport line 92 corresponds to the heated air circulation structure in the present invention, the refrigerant flow path 20 corresponds to the first heat exchange part, and the heating target 28 (contact part) corresponds to the second heat exchange part. In this embodiment, a switching damper 94 is disposed between the suction portion of the blower 76 and the other end 92B of the heat transport line 92, and a state in which outside air (or inside air) is introduced into the blower 76 and heat transport. It is configured to be able to switch between a state where air is introduced by circulating through the line 92.

  In the vehicle chemical heat storage system 90, the normal air conditioning mode and heat storage mode by the vehicle air conditioner 62 are basically operated in the same manner as the vehicle chemical heat storage system 10 (controlled by the heat storage ECU 82). . In the air conditioning mode, outside air is selected by the switching damper 94 and the indoor duct 78A is selected by the switching damper 75.

  On the other hand, in the heat dissipation mode, as shown in FIG. 9, the heat radiated from the reactor 16 by the operation of the blower 76 is transported to the reaction flow path 14 through the heat transport line 92, and this air is transported to the heat transport line 92 and the air duct 78. It comes to circulate through. Other configurations of the vehicle chemical heat storage system 90 are basically the same as the corresponding configurations of the vehicle chemical heat storage system 10 according to the first embodiment.

  Therefore, the vehicle chemical heat storage system 90 according to the second embodiment can basically obtain the same effect by the same operation as the vehicle chemical heat storage system 10 according to the first embodiment. Further, in the vehicle chemical heat storage system 90, the air radiated from the reactor 16 and supplied to the heating target 28 is supplied to the air flow path 72B of the evaporator 72, so that the air flowing through the air flow path 72B of the evaporator 72 The temperature gradually increases as the temperature of the heating object 28 increases (time elapses). This air prevents or suppresses frost formation on the heat transfer surface of the evaporator 72.

  That is, at the time of cold start of an automobile, for example, since the air temperature that is a lower heat source is low, frost formation on the heat transfer surface of the evaporator 72 is likely to occur due to execution of the heat dissipation cycle, and this frost increases the thermal resistance, The air flow is deteriorated due to the clogging of the flow path, and the performance of the evaporator 72 is deteriorated. On the other hand, in the vehicle chemical heat storage system 10, the air after passing through the heating object 28 is guided to the evaporator 72 as described above, thereby preventing or suppressing the frost formation on the heat transfer surface of the evaporator 72, that is, the performance deterioration of the evaporator 72. can do.

  In particular, in the vehicle chemical heat storage system 90, the heating air is circulated in the order of the reactor 16, the heating object 28, and the evaporator 72 by the heat transport line 92 and the air duct 78, so frost is formed on the heat transfer surface of the evaporator 72. Is more effectively prevented or suppressed.

(Third embodiment)
A chemical heat storage system 100 for a vehicle according to a third embodiment of the present invention will be described with reference to FIGS. 10 and 11. FIG. 10 shows a schematic overall system configuration of the chemical heat storage system 100 for a vehicle in a schematic system configuration diagram. As shown in this figure, the vehicle chemical heat storage system 100 does not include the condenser cooling system 58 having the refrigerant circulation line 52 independent of the air conditioner refrigerant circulation path 74 of the vehicle air conditioner 62, and the vehicle air conditioner 62. It differs from the chemical heat storage system 10 for vehicles which concerns on 1st Embodiment by the point which discharge | releases the condensation heat | fever of water vapor | steam using this.

  Specifically, the vehicle chemical heat storage system 100 includes a bypass line 102 that communicates the refrigerant outlet side of the compressor 64 and the refrigerant outlet side of the gas-liquid separator 68 (condenser 66) in the air conditioner refrigerant circulation path 74. . Three-port valves 104 and 106 are provided at connection portions between the air conditioner refrigerant circulation path 74 and the bypass line 102, respectively. The bypass line 102 is provided with a refrigerant pump 108.

  The three-port valves 104 and 106 are shown in a normal state in which the flow of the air-conditioner refrigerant to the bypass line 102 is prohibited as shown in FIG. 11 (A) and in FIG. 11 (B) as controlled by the heat storage ECU 82. As described above, the configuration is such that the bypass state in which the flow of the air-conditioning refrigerant to the expansion valve 70, the evaporator 72, and the compressor 64 is prohibited can be switched. The refrigerant pump 108 is operated in a bypass state so that the air-conditioner refrigerant circulates in the order of an evaporator / condenser 110, a condenser 66, and a gas-liquid separator 68 which will be described later. In this embodiment, the bypass line 102, the three-port valves 104 and 106, and the refrigerant pump 108 constitute the refrigerant bypass structure in the present invention, and among these, the three-port valves 104 and 106 are the flow path switching device in the present invention. It corresponds to.

  Further, the evaporator / condenser 110 constituting the chemical heat storage system 100 for a vehicle has an air conditioner refrigerant flow path 112 instead of the refrigerant flow path 36 and the heat medium flow path 38, and is therefore for a vehicle. It is different from the evaporator / condenser 30 constituting the chemical heat storage system 10. The air conditioner refrigerant flow path 112 is disposed adjacent to the evaporative condensation chamber 34 so that heat exchange between the air conditioner refrigerant flowing through the air conditioner refrigerant and water or water vapor in the evaporative condensation chamber 34 is possible. In other words, the evaporator / condenser 110 in this embodiment is configured by providing the evaporation condensing chamber 34 and the air conditioner refrigerant flow path 112 in the container 40. Other configurations of the vehicle chemical heat storage system 100 are basically the same as the corresponding configurations of the vehicle chemical heat storage system 10 according to the first embodiment.

  Next, portions of the operation of the third embodiment that are different from the operations of the first embodiment will be described.

  In an automobile to which the vehicle chemical heat storage system 100 having the above configuration is applied, for example, when using air conditioning in summer, the vehicle air conditioner 62 includes a compressor 64, a condenser 66, a gas-liquid separator 68, an expansion valve as the air conditioner refrigerant. 70 and the evaporator 72 are operated in a normal state that circulates in this order. At this time, as in the case of the vehicle chemical heat storage system 10, an air conditioner cycle in which heat is not released by the evaporator / condenser 110 is performed by closing the on-off valve 42 and the on-off valve 50.

  On the other hand, when executing the heat dissipation mode, the vehicle air conditioner 62 is operated in a normal state as shown in FIG. At this time, similarly to the vehicle chemical heat storage system 10, the fan 80 is stopped, so that heat is not radiated from the condenser 66. Thus, in the vehicle chemical heat storage system 100, the water supplied to the evaporation condensation chamber 34 is evaporated by the heat radiation of the air-conditioner refrigerant in the evaporation / condenser 110 and is supplied to the hydration reaction in the reactor 16. That is, by maintaining the vehicle air conditioner 62 in the normal state, the heat release mode corresponding to the required heat release amount of the heating target 28 is performed as in the vehicle chemical heat storage system 10.

  When the heat storage mode is executed, the vehicle air conditioner 62 is switched to the bypass state as shown in FIG. 11B, and the refrigerant pump 108 is operated. Thereby, the air-conditioner refrigerant is circulated in the order of the evaporator / condenser 110, the condenser 66, and the gas-liquid separator 68, and the condensation heat transmitted to the air-conditioner refrigerant by the evaporator / condenser 110 is radiated by the condenser 66, and the heat accumulation mode. (Chemical heat storage material dehydration reaction) is maintained.

  In this heat storage mode, the vehicle air conditioner 62 is switched to the bypass state corresponding to the heat storage mode either before or after detecting the heat storage in step S14 (between steps S12 and S14 and between steps S14 and S16). Yes. Therefore, in the chemical heat storage system for vehicles 100, as in the chemical heat storage system for vehicles 10, heat storage is detected in step S14, and steps S16 to S20 (substantially heat storage operation) are performed.

  As described above, even according to 100 according to the third embodiment, basically the same effect can be obtained by the same operation as 10 according to the first embodiment. In the vehicle chemical heat storage system 100, the bypass line 102, the three-port valves 104 and 106, and the refrigerant pump 108 are provided in the vehicle air conditioner 62, so that the condenser cooling system 58 is not provided, and the refrigerant pump is mainly used. A condenser cooling system in the heat storage mode can be configured with only 108 power consumption. That is, in the vehicle chemical heat storage system 100, the system configuration can be simplified.

  Furthermore, in the vehicle chemical heat storage system 100, the air-conditioner refrigerant is used for both the application of latent heat of evaporation to the water in the evaporative condensation chamber 34 and the recovery of the condensation heat of the water vapor in the evaporative condensation chamber 34. The vessel 110 can be configured with the evaporative condensation chamber 34 and the air conditioner refrigerant flow path 112 as main parts. For this reason, the evaporator / condenser 110 has a simple structure as compared with the evaporator / condenser 30 having the three flow paths 34, 36, and 38.

  Note that the heat transport line 92 and the switching damper 94 in the twelfth embodiment may be applied to the third embodiment.

  Further, in each of the above-described embodiments, an example in which the amount of water vapor generated in the evaporator / condensers 30 and 110 (the amount of circulation of the air conditioner refrigerant in the vehicle air conditioner 62) is controlled based on the required heat release amount of the heating target 28. However, the present invention is not limited to this. For example, the heat radiation from the reactor 16 may be continued until the heating object 28 is heated to a predetermined temperature.

  Furthermore, in the above-described embodiment, the example in which the vehicle chemical heat storage system 10, 90, 100 is configured by including the evaporator / condenser 30, 110 having both the function as an evaporator and the function as a condenser has been described. However, this invention is not limited to this, For example, it is good also as a structure provided with the evaporator and condenser with which the chemical thermal storage system 10, 90, 100 for vehicles was comprised independently.

1 is a system configuration diagram showing a schematic overall configuration of a chemical heat storage system for a vehicle according to a first embodiment of the present invention. 1 is a block diagram showing a heat storage ECU constituting a vehicle chemical heat storage system according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the operation mode of the chemical thermal storage system for vehicles which concerns on the 1st Embodiment of this invention, or a vehicle air conditioner, Comprising: (A) is a system block diagram of an air-conditioner mode, (B) is heat dissipation mode. (C) is a system configuration diagram of a heat storage mode. It is a flowchart which shows the control flow by thermal storage ECU which comprises the chemical thermal storage system for vehicles which concerns on the 1st Embodiment of this invention. It is a Ph diagram which shows the latent heat of vaporization supplied from the air conditioner for vehicles in the heat dissipation mode of the chemical heat storage system for vehicles concerning a 1st embodiment of the present invention. It is a figure for demonstrating the relationship of the heat input / output in the thermal radiation mode of the chemical thermal storage system for vehicles which concerns on the 1st Embodiment of this invention, Comprising: (A) is a schematic diagram which shows thermal radiation mode, (B) is the amount of thermal radiation. (C) is a pie chart showing the amount of latent heat of evaporation occupying the amount of heat input. It is a bar graph which shows the heat increase ratio which is a ratio of the heat input / output amount of the chemical heat storage system for vehicles which concerns on the 1st Embodiment of this invention by comparison with a non-brilliant. It is a system block diagram which shows the schematic whole structure of the chemical thermal storage system for vehicles which concerns on the 2nd Embodiment of this invention. It is a system block diagram which shows the thermal radiation mode of the chemical thermal storage system for vehicles which concerns on the 2nd Embodiment of this invention. It is a system block diagram which shows the schematic whole structure of the chemical heat storage system for vehicles which concerns on the 3rd Embodiment of this invention. It is a figure for demonstrating the operation mode of the chemical heat storage system for vehicles concerning the 3rd Embodiment of this invention, Comprising: (A) is a system block diagram of heat dissipation mode, (B) is a system block diagram of heat storage mode. is there.

Explanation of symbols

10 Vehicle Chemical Heat Storage System 14 Reaction Channel (Chemical Heat Storage Material Space)
16 Reactor 20 Refrigerant flow path (first heat exchange part)
28 Heating target (second heat exchange part)
30 Evaporator / Condenser (Evaporator)
34 Evaporation condensation chamber (part connected to the space for chemical heat storage materials, evaporation condensation space)
36 Refrigerant flow path 62 Air conditioner for vehicle 64 Compressor 66 Condenser 70 Expansion valve 72 Evaporator 72B Air flow path 74 Air conditioner refrigerant circulation path (refrigerant circulation path)
82 Thermal storage ECU (control device)
90 ・ 100 Chemical heat storage system for vehicles 92 Heat transport line (heating air circulation structure)
102 Bypass line (refrigerant bypass structure)
104/106 port valve (refrigerant bypass structure)
108 Refrigerant pump (pump, refrigerant bypass structure)
110 Evaporator / Condenser (Evaporator, Condenser)
112 Air conditioner refrigerant flow path (refrigerant flow path)

Claims (9)

Reactor with a built-in chemical heat storage material that performs dehydration reaction by heat supply from the vehicle and stores heat, and dissipates heat by hydration reaction;
A condensing part for condensing water vapor released from the reactor during the dehydration reaction;
Heat exchange with the refrigerant flowing between the compressor and the condenser in the refrigerant circulation path of the vehicle air conditioner for circulating the refrigerant to the evaporator, the compressor, the condenser, and the expansion valve is provided, and water is exchanged by heat exchange with the refrigerant. By evaporating the water vapor for the hydration reaction to the reaction unit,
A chemical heat storage system for vehicles.   The chemical heat storage material space in which the chemical heat storage material in the reactor is built-in, and a portion communicating with the chemical heat storage material space in the evaporation section are sealed in a reduced pressure state relative to atmospheric pressure. Item 2. A chemical heat storage system for a vehicle according to Item 1.   A first heat exchanging part capable of exchanging heat between the air flowing inside and the chemical heat storage material of the reactor, and a second heat exchanging part capable of exchanging heat between the air flowing inside and the object to be heated, and The chemical heat storage system for vehicles according to claim 1 or 2 further provided with the heating air distribution structure constituted so that the air which passed the 2nd heat exchange part may be led to the air flow path of said evaporator.   4. The chemical heat storage system for a vehicle according to claim 3, wherein the heated air circulation structure is configured to guide air that has passed through an air flow path of the evaporator to the first heat exchange unit. 5. Provided in the vehicle air conditioner, further comprising a refrigerant bypass structure capable of circulating the refrigerant by bypassing the evaporator, the compressor, and the expansion valve;
The condensing part is provided so as to be able to exchange heat with the refrigerant circulated by bypassing the evaporator, the compressor, and the expansion valve by the refrigerant bypass structure, and the water vapor flowing from the reactor by heat exchange with the refrigerant The chemical heat storage system for vehicles according to any one of claims 1 to 4, wherein the chemical heat storage system is configured to condense the fuel.   The refrigerant bypass structure includes a bypass channel that communicates the upstream side and the downstream side of the capacitor, a pump provided in the bypass channel, a normal state in which the refrigerant does not flow through the bypass channel, and the refrigerant The vehicular chemical heat storage system according to claim 5, comprising a flow path switching device that can switch between a bypass state that selectively flows through the bypass flow path.   The evaporating unit and the condensing unit are an evaporating / condensing unit in which the evaporating and condensing space in which the water or water vapor exists and the refrigerant flow path through which the refrigerant flows are provided so that heat can be exchanged between the water or water vapor and the refrigerant. The vehicular chemical heat storage system according to claim 5 or 6, which is integrally formed.   A control device that detects the heat storage state of the reactor in the chemical heat storage material and controls the refrigerant bypass structure so that the refrigerant circulates bypassing the evaporator, the compressor, and the expansion valve in the heat storage state. The chemical heat storage system for vehicles according to any one of claims 5 to 7, further comprising:   When dissipating heat to the chemical heat storage material, the required heat release amount is detected, and the flow rate of the refrigerant is determined so that water vapor for releasing the detected heat release amount is supplied from the evaporator to the reactor. The vehicular chemical heat storage system according to any one of claims 1 to 8, further comprising a control device that controls the compressor.

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