JP6061462B2 - Chemical heat storage device - Google Patents

Description

  The present invention relates to a chemical heat storage device.

  As a chemical heat pump device, a reaction vessel in which a chemical reactant is sealed and a storage vessel in which a gas and its liquid are stored are connected by a communication pipe in which a heat transport medium is enclosed, and the hydration heat of the reaction vessel is A structure is disclosed in which a part of the liquid is supplied to a storage container and latent heat necessary for evaporation of the liquid in the storage container is supplied (see Patent Document 1).

JP 2003-214721 A

  However, in the above-described conventional example, no particular consideration is given to the use of sensible heat when the gas is released from the chemical reaction material (chemical heat storage material) that has reacted with the gas and regenerated.

  In view of the above fact, an object of the present invention is to recover the sensible heat remaining in the reaction vessel in which the regeneration of the chemical heat storage material is completed, and to increase the energy utilization rate.

According to the first aspect of the present invention, a plurality of reaction containers having a chemical heat storage material that generates heat and desorbs when heated by a chemical reaction with the reaction material, the reaction material is stored, and the reaction The reaction material is supplied to the container, and heat exchange is possible by circulating a heat medium between the evaporation condenser for collecting the reaction material desorbed from the chemical heat storage material and the plurality of reaction containers. comprising a first heat exchanger, and a second heat exchanger that enables heat exchange by circulating the heat medium between said reaction vessel of each said evaporative condenser to the first heat The exchange unit is configured by connecting pipes for passing the heat medium between the plurality of reaction vessels and the evaporative condenser in the second heat exchange unit with a bypass pipe, and each of the reactions A heat exchanger provided in the container is connected to the first heat exchange unit and the first heat exchanger. It is shared by the heat exchange unit.

  The chemical heat storage device according to claim 1, wherein when the chemical heat storage material is heated in a certain reaction container, the reaction material is separated from the chemical heat storage material, that is, when the regeneration of the chemical heat storage material is completed, the reaction container The remaining sensible heat can be supplied to another reaction vessel via the first heat exchange section. Thereby, the energy supplied to the reaction container when the chemical heat storage material is regenerated in the other reaction container can be reduced.

In addition, when the regeneration of the chemical heat storage material is completed in all the reaction containers, the sensible heat of the reaction container that has been completely regenerated mainly may be supplied to the other reaction containers through the first heat exchange unit. it can. Thereby, it is possible to perform warm-up provided when the reaction material is reacted with the chemical heat storage material in each reaction vessel next time.
Furthermore, when the regeneration of the chemical heat storage material is completed in a certain reaction container, the sensible heat remaining in the reaction container can be supplied to the evaporation condenser via the second heat exchange unit. The second heat exchange unit enables heat exchange by circulating a heat medium between each reaction vessel and the evaporative condenser. Thereby, when reacting a reaction material with a chemical heat storage material in each reaction vessel next time, the sensible heat can be used as a heat source for heating an evaporation condenser serving as a supply source of the reaction material.

  Thus, according to the present invention, the utilization factor of energy can be increased.

A second aspect of the present invention, in the chemical heat storage device according to claim 1, and a temperature measuring device provided in the evaporative condenser.

In the chemical heat storage device according to claim 2 , the temperature of the reaction material in the evaporative condenser is controlled by the temperature measuring device so as not to fall below the freezing point, thereby suppressing the freezing of the reaction material and the reaction. The material and the chemical heat storage material can be continuously reacted to generate heat energy stably.

A third aspect of the present invention is the chemical heat storage device according to the first or second aspect , further comprising a heat recovery unit provided in the evaporative condenser.

In the chemical heat storage device according to claim 3, when the chemical heat storage material and the reaction material are chemically reacted in a certain reaction container, the reaction material in the evaporation condenser is evaporated and supplied to the reaction container. The sensible heat (cold heat) of the evaporative condenser based on the latent heat of vaporization can be recovered by a heat recovery device and used for cooling other equipment.

Immediately after the chemical reaction between the chemical heat storage material and the reaction material in one reaction container is completed, the chemical reaction between the chemical heat storage material and the reaction material in the next reaction container is not started, but for example , the reaction in the evaporation condenser The cold heat is recovered by the heat recovery unit until the temperature of the material reaches the upper limit (upper limit temperature) of the temperature suitable for cooling other equipment. When the temperature of the reaction material in the evaporative condenser reaches the upper and lower temperatures, the chemical reaction between the chemical heat storage material and the reaction material in the next reaction vessel is started. For this reason, the amount of cold recovery from the evaporative condenser can be increased.

  Further, as described above, an excessive chemical reaction in the reaction container can be suppressed by delaying the start of the chemical reaction in the next reaction container. Thereby, the thermal energy required at the time of reproduction | regeneration of the chemical thermal storage material in reaction container can be suppressed.

The invention according to claim 4 is the chemical heat storage device according to any one of claims 1 to 3 , wherein the reaction material is stored as the evaporative condenser, the reaction material is evaporated, and the reaction container is stored. A first evaporative condenser that supplies the first evaporative condenser, and a second evaporative condenser that condenses and recovers the reaction material desorbed from the chemical heat storage material, the first evaporative condenser and the second evaporative condensation A third heat exchanging section that enables heat exchange with the vessel.

In the chemical heat storage device according to claim 4 , the latent heat of evaporation obtained when the reaction material is evaporated in the first evaporation condenser and supplied to the reaction vessel is converted into the second evaporation condenser via the third heat exchange unit. By supplying to and storing heat, the second evaporative condenser can be used as a cold heat source when condensing the reaction material.

  In addition, the latent heat of condensation when the reactant is condensed in the second evaporative condenser is supplied to the first evaporative condenser via the third heat exchange section to store the heat, whereby the reaction occurs in the first evaporative condenser. It can be used as a heat source for evaporating the material.

  As described above, according to the present invention, it is possible to effectively use latent heat between the first evaporative condenser and the second evaporative condenser to increase the energy utilization rate.

  As described above, according to the chemical heat storage device of the first aspect of the present invention, the sensible heat remaining in the reaction vessel in which the regeneration of the chemical heat storage material is completed is recovered to increase the energy utilization rate. The excellent effect of being able to be obtained is obtained.

According to the chemical heat storage device of the second aspect , it is possible to obtain an excellent effect that the reaction material and the chemical heat storage material are continuously reacted to generate heat energy stably in the reaction vessel.

According to the chemical heat storage device of the third aspect , an excellent effect is obtained in that the amount of cold recovered from the evaporative condenser can be increased and the thermal energy required when the chemical heat storage material is regenerated can be suppressed. It is done.

According to the chemical heat storage device of claim 4 , an excellent effect that the utilization rate of energy can be increased by effectively using latent heat between the first evaporative condenser and the second evaporative condenser. Is obtained.

1 and 2 relate to the first embodiment, and FIG. 1 is a schematic diagram showing a chemical heat storage device. It is a timing chart figure which shows the opening / closing timing of each valve | bulb, and the use timing of each regeneration heat source, and the diagram which shows the temperature change of a 1st reaction container and a 2nd reaction container. 3 and 4 relate to the second embodiment, and FIG. 3 is a schematic diagram showing a chemical heat storage device. It is a timing chart figure which shows opening and closing timing of each valve at the time of hydration, and a diagram showing a temperature change of the 1st reaction container and the 2nd reaction container. It is a timing chart figure which shows the opening-and-closing timing of each valve at the time of dehydration, and a diagram showing a temperature change of the 1st reaction container and the 2nd reaction container. It is a schematic diagram which shows the chemical heat storage apparatus which concerns on 3rd Embodiment. 7 and 8 relate to the fourth embodiment, and FIG. 7 is a schematic view showing a chemical heat storage device. It is a timing chart figure which shows the opening / closing timing of each valve | bulb, and a diagram which shows the temperature change of a 1st reaction container, a 2nd reaction container, and an evaporation condenser. 9 and 10 relate to the fifth embodiment, and FIG. 9 is a schematic view showing a chemical heat storage device. It is a timing chart figure which shows the opening / closing timing of each valve | bulb, and a diagram which shows the temperature change of the evaporator and condenser in an evaporation condenser.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
In FIG. 1, a chemical heat storage device 10 according to the present embodiment relates to a heat storage device mounted on a vehicle, for example, and includes a first reaction vessel 12 and a second reaction vessel 22 as an example of a plurality of reaction vessels, and an evaporation condenser 14. And a first heat exchanging unit 11.

The first reaction vessel 12 and the second reaction vessel 22 have a chemical heat storage material 18 that generates heat due to a chemical reaction with the reaction material 16 and from which the reaction material 16 is desorbed when heated. The reaction material 16 is, for example, water (H ₂ 0), and the chemical heat storage material 18 is, for example, an alkaline earth metal chloride. The first reaction vessel 12 is provided with a heat recovery device 24, a first regeneration heat source 41, and a heat exchanger 26 of the first heat exchange unit 11.

  The heat recovery device 24 is configured to recover heat energy (sensible heat) generated by a chemical reaction between the chemical heat storage material 18 and the reaction material 16 and supply it to other devices (battery or the like) to be heated. .

  The first regeneration heat source 41 is for heating the chemical heat storage material 18 and desorbing the reaction material 16 during the regeneration of the chemical heat storage material 18 in the first reaction vessel 12. As the first regeneration heat source 41, an electric heater, a heat exchanger connected to an external heat source, or the like is used.

  Similarly, the 2nd reaction container 22 has the chemical heat storage material 18, and the heat recovery device 24, the 2nd reproduction | regeneration heat source 42, and the heat exchanger 28 of the 1st heat exchange part 11 are provided. .

  The second regeneration heat source 42 is for heating the chemical heat storage material 18 and desorbing the reaction material 16 when the chemical heat storage material 18 is regenerated in the second reaction vessel 22. As the second regeneration heat source 42, an electric heater, a heat exchanger connected to an external heat source, or the like is used.

  In addition, the 1st regeneration heat source 41 and the 2nd regeneration heat source 42 are integrated with the heat recovery device 24, and at the time of reproduction | regeneration of the chemical heat storage material 18, the 1st reaction container 12 and 2nd through the heat recovery device 24 from heat sources, such as an engine. Thermal energy may be supplied to the reaction vessel 22.

  The evaporative condenser 14 stores the reaction material 16, supplies the reaction material 16 to the first reaction container 12 and the second reaction container 22, and collects the reaction material 16 desorbed from the chemical heat storage material 18. It is configured as follows. The evaporative condenser 14 is connected to the first reaction vessel 12 through a communication pipe 32 having a valve 51, and is connected to the second reaction vessel 22 through a communication pipe 34 having a valve 52. The evaporative condenser 14 is provided with a heat recovery unit 36 for transporting latent heat generated in the evaporative condenser 14 to / from an external device. The heat recovery unit 36 may not be used.

  The first heat exchange unit 11 is heat exchange means that enables heat exchange between the first reaction vessel 12 and the second reaction vessel 22. This 1st heat exchange part 11 is constituted by connecting heat exchangers 26 and 28, valve 44, pump 46, and heat carrier container 48 which stores heat carrier 54 in series by piping 38, for example. Has been. The heat medium 54 is, for example, a coolant liquid, and is configured to be circulated between the first reaction vessel 12 and the second reaction vessel 22 through a pipe 38 by a pump 46.

  In addition, the structure of the 1st heat exchange part 11 is not restricted to this, The heat exchange between the 1st reaction container 12 and the 2nd reaction container 22 should just be possible.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. First, the action when the chemical heat storage material 18 and the reaction material 16 are chemically reacted (hydration reaction) in the first reaction vessel 12 will be described.

  In FIG. 1, when the valve 44 of the first heat exchange section 11 and the valve 52 of the communication pipe 34 on the second reaction vessel 22 side are closed, the valve 51 of the communication pipe 32 on the first reaction vessel 12 side is opened. The vapor (water vapor) of the reaction material 16 generated in the evaporative condenser 14 moves into the first reaction vessel 12 through the communication pipe 32. Since the reaction material 16 and the chemical heat storage material 18 undergo a chemical reaction (hydration reaction), heat energy (sensible heat) is generated. Therefore, the heat energy is recovered by the heat recovery device 24, and other devices (batteries) Etc.) and the equipment can be warmed up.

  The same applies to the chemical reaction (hydration reaction) between the chemical heat storage material 18 and the reaction material 16 in the second reaction vessel 22.

Next, an operation when the chemical heat storage material 18 is regenerated by desorbing (dehydrating) the reaction material 16 from the chemical heat storage material 18 combined with the reaction material 16 in the first reaction vessel 12 will be described. In the diagram showing the relationship between the time of FIG. 2 and the temperature of each reaction vessel (hereinafter simply referred to as “diagram”), T _R , T _S , T ₁ and T ₂ mean the following temperatures, respectively. ing.

T _R : temperature at which the reaction material 16 begins to desorb from the chemical heat storage material 18 T _S : outside air temperature T ₁ : temperature of the first reaction vessel 12 T ₂ : temperature of the second reaction vessel 22

The regeneration (dehydration) of the chemical heat storage material 18 is performed according to the timing chart of FIG. First, when the valves 52 and 44 are closed and the second regeneration heat source 42 is deactivated, the valve 51 is opened and the first regeneration heat source 41 is activated, the interior of the first reaction vessel 12 is caused by the first regeneration heat source 41. It is heated, as shown in the diagram of FIG. 2, the temperature T ₁ is increased. When the temperature T ₁ becomes _{equal to} or higher than the temperature TR, the reaction material 16 combined with the chemical heat storage material 18 starts to be detached from the chemical heat storage material 18. By maintaining the temperature T ₁ of more than a temperature T _R, reaction material 16 until completely desorbed from a chemical heat storage material 18, the dehydration continues (section A of the diagram of FIG. 2). At this time, the reaction material 16 desorbed from the chemical heat storage material 18 returns to the evaporation condenser 14 through the communication pipe 32, and is condensed and stored in the evaporation condenser 14 (FIG. 1).

When regeneration (dehydration) of the chemical heat storage material 18 is completed, the operation of the first regeneration heat source 41 is stopped and the valve 51 is closed. At the same time, the valves 52 and 44 are opened. Thereby, heat exchange between the first reaction vessel 12 and the second reaction vessel 22 starts. Specifically, the sensible heat remaining in the first reaction vessel 12 is supplied to another reaction vessel, that is, the second reaction vessel 22 via the first heat exchange unit 11. Accordingly, the temperature T ₁ is started to decrease, temperature T ₂ which was in the vicinity of the temperature T _S begins to increase. This heat exchange continues until the temperatures T ₁ and T ₂ become equal (section B in the diagram of FIG. 2).

When the temperatures T ₁ and T ₂ become equal, heat exchange is not performed, so the valve 44 is closed and the second regeneration heat source 42 is operated. Then, since the second reaction vessel 22 is heated by the second regeneration heat source 42, as shown in the diagram of FIG. 2, temperature T ₂ rises further. On the other hand, the temperature T ₁ is gradually reduced.

As described above, the second regeneration heat source 42 is not operated until the temperatures T ₁ and T ₂ are equal to each other, so that when the chemical heat storage material 18 is regenerated in the second reaction container 22, the second regeneration heat source 22 is supplied to the second reaction container 22. Energy to be reduced.

When the temperature T ₂ becomes _{equal to} or higher than the temperature TR, the reaction material 16 combined with the chemical heat storage material 18 starts to be detached from the chemical heat storage material 18. By maintaining the temperature T ₂ above the temperature T _R, reaction material 16 until completely desorbed from a chemical heat storage material 18, the dehydration continues (section C of the diagram of FIG. 2). At this time, the reaction material 16 desorbed from the chemical heat storage material 18 returns to the evaporation condenser 14 through the communication pipe 34, and is condensed and stored in the evaporation condenser 14 (FIG. 1).

When regeneration (dehydration) of the chemical heat storage material 18 is completed, the operation of the second regeneration heat source 42 is stopped and the valve 52 is closed. At the same time, the valve 44 is opened. Thereby, heat exchange between the first reaction vessel 12 and the second reaction vessel 22 starts. Specifically, the sensible heat remaining in the second reaction vessel 22 is supplied to the first reaction vessel 12 via the first heat exchange unit 11. Thus, temperature T ₂ starts to decrease, temperatures T ₁ starts to increase (section D of the diagram of FIG. 2).

  That is, when the regeneration of the chemical heat storage material 18 is completed in all the reaction containers, the sensible heat of the reaction container (second reaction container 22) that has been completely regenerated mainly through the first heat exchange unit 11 is finally obtained. Can be supplied to another reaction vessel (first reaction vessel 12). Thereby, the warming-up provided when making the reaction material 16 react with the chemical thermal storage material 18 in each reaction container next time can be performed.

  Thus, according to this embodiment, the utilization factor of energy can be increased.

[Second Embodiment]
In FIG. 3, the chemical heat storage device 20 according to the present embodiment is configured by replacing the first heat exchange unit 11 in the first embodiment with a second heat exchange unit 21. The second heat exchange unit 21 is a heat exchange means that enables heat exchange between the first reaction vessel 12 and the evaporation condenser 14 and between the second reaction vessel 22 and the evaporation condenser 14. .

  In the second heat exchange unit 21, on the first reaction vessel 12 side, for example, the heat exchangers 26 and 56, the valve 43, the pump 46, and the heat medium vessel 48 are connected in series by a pipe 37. It is constituted by. The heat medium 54 is configured to be circulated in the pipe 37 by the pump 46.

  The second heat exchanging unit 21 connects, for example, the heat exchangers 28 and 58, the valve 45, the pump 47, and the heat medium container 48 in series on the second reaction container 22 side through the pipe 39. It is constituted by. The heat medium 54 is configured to be circulated in the pipe 39 by a pump 47. On the second reaction vessel 22 side, the heat medium 54 is configured to be circulated in the pipe 39 by a pump 46.

  In the second heat exchange unit 21, the heat exchangers 56 and 58 are disposed in the evaporative condenser 14.

  In addition, the structure of the 2nd heat exchange part 21 is not restricted to this, The heat exchange between the 1st reaction container 12 and the 2nd reaction container 22 should just be possible.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. First, the action when the chemical heat storage material 18 and the reaction material 16 are chemically reacted (hydration reaction) in the first reaction container 12 and the second reaction container 22 will be described. In the diagram of FIG. 4, the temperature T _E is meant the minimum temperature that can be used as a heat source for warming up the other devices.

The chemical reaction (hydration reaction) between the chemical heat storage material 18 and the reaction material 16 is performed according to the timing chart of FIG. First, when the valve 52 is closed, the valves 43 and 45 of the second heat exchange unit 21 are closed, and the valve 51 of the communication pipe 32 is opened, the vapor (water vapor) of the reaction material 16 generated in the evaporation condenser 14. Moves into the first reaction vessel 12 through the communication pipe 32. The reaction material 16 and the chemical heat storage material 18 undergo a chemical reaction (hydration reaction) to generate thermal energy (sensible heat), and the temperature T ₁ of the first reaction vessel 12 rises. This sensible heat can be recovered by the heat recovery device 24 and supplied to another device (battery or the like) to warm up the device. This hydration reaction continues until the reaction material 16 cannot be bonded to the chemical heat storage material 18 (section E in the diagram of FIG. 4).

Although the valve 51 is closed at the timing when the hydration reaction is completed, since the recovery of the sensible heat of the first reaction vessel 12 by the heat recovery device 24 continues, the temperature T ₁ starts to decrease. At the timing when the temperature _{T 1} is close to the temperature _{T E,} opening the valve 52 of the communication pipe 34. Then, the vapor (water vapor) of the reaction material 16 generated in the evaporative condenser 14 moves into the second reaction vessel 22 through the communication pipe 34. Thermal energy (sensible heat) is generated by the reaction member 16 and a chemical heat storage material 18 is a chemical reaction (hydration), the temperature T ₂ of the second reaction vessel 22 is increased. The hydration reaction in the second reaction vessel 22 continues until the reaction material 16 cannot be bonded to the chemical heat storage material 18 (section G in the diagram of FIG. 4).

In the section G, at the timing when the temperature _{T 1} of the first reaction vessel 12 has fallen to a temperature _{T E,} opening the first reaction vessel 12 side of the valve 43 of the second heat exchange portion 21. Then, sensible heat of the first reaction vessel 12 below the temperature T _E is supplied to the evaporative condenser 14 via the second heat exchange portion 21. Thereby, it is possible to supplement the latent heat of vaporization of the reaction material 16 in the evaporative condenser 14 and promote the evaporation.

That is, in the section F of the diagram of Figure 4, the temperature T _E more sensible heat remaining in the first reaction vessel 12 after hydration completion, can be utilized to recover the heat recovery unit 24, also, in the section G of the diagram of Figure 4, can further sensible heat below the temperature T _E remaining in the first reaction vessel 12, for use as a heat source for evaporative condenser 14.

While closing the valve 52,43 at the timing when the hydration reaction is complete in the second reaction vessel 22, since the recovery of the sensible heat of the second reaction vessel 22 by the heat recovery unit 24 is followed, temperature T ₂ is reduced start. Until the temperature T ₂ reaches the temperature T _E, the sensible heat remaining in the second reaction vessel 22 after completion of the hydration reaction can be recovered by the heat recovery unit 24 (section J of the diagram of FIG. 4).

Next, the action when regenerating the chemical heat storage material 18 for which the hydration reaction has been completed will be described. Since the basic operation at the time of reproduction is the same as that of the first embodiment, different parts will be described. In the diagram of FIG. 5, T _B indicates the temperature of the reaction member 16 in the evaporative condenser 14.

  The operation of each valve during the regeneration (dehydration) of the chemical heat storage material 18 is performed according to the timing chart of FIG. First, the valves 52 and 43 are closed and the valve 51 is opened to regenerate (dehydrate) the chemical heat storage material 18 in the first reaction vessel 12. Dehydration continues until the reaction material 16 is completely detached from the chemical heat storage material 18 (section A in the diagram of FIG. 5).

  When regeneration (dehydration) of the chemical heat storage material 18 in the first reaction vessel 12 is completed, the valve 51 is closed and the valve 52 is opened. Thus, regeneration (dehydration) of the chemical heat storage material 18 in the second reaction vessel 22 is performed. Dehydration continues until the reaction material 16 is completely detached from the chemical heat storage material 18 (section C in the diagram of FIG. 5).

  The regeneration timing of the first reaction container 12 and the second reaction container 22 may be simultaneous.

At the timing when the regeneration of the chemical heat storage material 18 is completed in all the reaction vessels (the first reaction vessel 12 and the second reaction vessel 22), the valve 52 is closed and the valves 43 and 45 are opened. Thereby, the sensible heat remaining in the first reaction vessel 12 and the second reaction vessel 22 can be supplied to the evaporative condenser 14 via the second heat exchange unit 21. Thus, as shown in the diagram of FIG. 5, the temperature T _B of the reaction member 16 in the evaporative condenser 14, coincides with the temperature T ₂ of the temperature T ₁ and the second reaction vessel 22 of the first reaction vessel 12 Go up until you do. That is, when the reaction material 16 is reacted with the chemical heat storage material 18 in each reaction container next time, the first reaction container after completion of regeneration is used as a heat source for heating the evaporation condenser 14 that is a supply source of the reaction material 16. 12 and the sensible heat of the second reaction vessel 22 can be used.

  Therefore, in this embodiment, the sensible heat of the 1st heat exchange part 11 and the 2nd reaction container 22 can be utilized still more effectively.

[Third Embodiment]
In FIG. 6, the chemical heat storage device 30 according to the present embodiment is configured by combining the first embodiment and the second embodiment and having a temperature measuring device 62 provided in the evaporative condenser 14.

  The temperature measuring device 62 is configured to be able to detect the temperature of the reaction material 16 stored in the evaporative condenser 14, and is used to prevent the temperature of the reaction material 16 from falling below the freezing point.

  The pipes 37 and 39 are provided with a bypass pipe 64 for circulating the heat medium 54 between the first reaction vessel 12 and the second reaction vessel 22. The bypass pipe 64 is connected to a portion between the heat exchanger 26 and the valve 43 and between the heat exchanger 28 and the valve 45. By closing the valves 43 and 45 and opening the valve 44, the heat medium 54 is heated between the first reaction vessel 12 and the second reaction vessel 22 as in the first heat exchange unit 11 of the first embodiment. It is possible to exchange. Further, by closing the valve 44, it is possible to exchange heat between the first reaction vessel 12, the second reaction vessel 22, and the evaporative condenser 14 as in the second heat exchange section 21 of the second embodiment. It has become.

  Since other parts are the same as those in the first embodiment or the second embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 6, in the chemical heat storage device 30 according to the present embodiment, when regeneration of the chemical heat storage material 18 is completed in the first reaction vessel 12, the valves 43 and 45 are closed and the valve 44 is opened, whereby the heat medium 54. Can be circulated between the first reaction vessel 12 and the second reaction vessel 22. Accordingly, when the sensible heat remaining in the first reaction vessel 12 is supplied to the second reaction vessel 22 via the first heat exchange unit 11 and the chemical heat storage material 18 is regenerated in the second reaction vessel 22. In addition, the energy supplied to the second reaction vessel 22 can be reduced.

  In addition, when the regeneration of the chemical heat storage material 18 is completed in all the reaction containers (the first reaction container 12 and the second reaction container 22), the valve 44 is closed and the valves 43 and 45 are opened. The sensible heat of the completed reaction vessel, for example, mainly the second reaction vessel 22 can be supplied to the evaporative condenser 14 via the second heat exchange unit 21. Thus, when the reaction material 16 is reacted with the chemical heat storage material 18 in each reaction vessel next time, the sensible heat is used as a heat source for heating the evaporation condenser 14 serving as a supply source of the reaction material 16. Can do. Therefore, all sensible heat from high temperature to low temperature can be used.

  Further, the temperature measuring device 62 controls so that the temperature of the reaction material 16 in the evaporative condenser 14 does not fall below the freezing point. Specifically, when the temperature of the reaction material 16 becomes near the freezing point, one or both of the valves 51 and 52 are closed to stop the hydration reaction in the first reaction container 12 or the second reaction container 22. At the same time, the valves 43 and 45 are opened to heat the evaporative condenser 14 with the sensible heat of the first reaction vessel 12 and the second reaction vessel 22. Thereby, freezing of the reaction material 16 can be suppressed, the reaction material 16 and the chemical heat storage material 18 can be continuously reacted, and heat energy can be generated stably.

  The means for heating the evaporative condenser 14 is not limited to the second heat exchanging unit 21, and a heat source (not shown) connected to the heat recovery unit 36 or a heat source (not shown) such as an electric heater is used. Also good.

[Fourth Embodiment]
In FIG. 7, the chemical heat storage device 40 according to this embodiment includes a first reaction vessel 12 and a second reaction vessel 22, an evaporative condenser 14, a temperature measuring device 62, and a heat recovery device 36. Has been.

  Since other parts are the same as those in the first embodiment, the second embodiment, or the third embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 7, in the chemical heat storage device 40 according to the present embodiment, when the chemical heat storage material 18 and the reaction material 16 are chemically reacted (hydration reaction) in the first reaction vessel 12, the reaction material in the evaporation condenser 14. 16 is evaporated and supplied to the first reaction vessel 12, and the sensible heat (cold heat) of the evaporative condenser 14 based on the latent heat of vaporization at that time is recovered by the heat recovery device 36 and used for cooling other equipment. can do.

The chemical reaction (hydration reaction) between the chemical heat storage material 18 and the reaction material 16 is performed according to the timing chart of FIG. And opening and closing timings of the valves 51 and 52, the temperature _{T 1} of the first reaction vessel 12 related change in the temperature _{T 2} of the second reaction vessel 22 is generally similar to the second embodiment (FIG. 4). In the diagram of FIG. 8, the temperature _TL means the upper limit of the temperature that can be used as a cold heat source for cooling other devices.

In this embodiment, during the chemical reaction (hydration reaction) between the chemical heat storage material 18 and the reaction material 16 in the first reaction vessel 12 and after the hydration reaction is completed and the valve 51 is closed, the evaporation condensation is performed. when the temperature T _B of the reaction member 16 in the vessel 14 is less than the temperature T _L is the heat recovery unit 36, to recover the sensible heat (latent heat of vaporization of the reaction member 16) of the evaporative condenser 14, other devices It can be used for cooling.

That is, immediately after the chemical reaction (hydration reaction) between the chemical heat storage material 18 and the reaction material 16 in the first reaction container 12 is completed, the chemical reaction between the chemical heat storage material 18 and the reaction material 16 in the second reaction container 22. Instead of starting the heat recovery device until the temperature of the reaction material 16 in the evaporative condenser 14 reaches the upper temperature limit (upper limit temperature T _L ) suitable for cooling other devices. The cold is recovered by 36.

Then, when the temperature T _B of the reaction member 16 in the evaporative condenser 14 has reached the temperature T _L, by opening the valve 52, chemical reactions and chemical heat storage material 18 and the reaction member 16 in the second reaction vessel 22 ( Hydration reaction) is started. Thus, the temperature T _B of the reaction member 16 in the evaporative condenser 14 is lowered again, to recover the sensible heat (latent heat of vaporization of the reaction member 16) of the evaporative condenser 14 by heat recovery unit 36 again, the other It can be used for equipment cooling. For this reason, the amount of cold energy recovered from the evaporative condenser 14 can be increased.

  Further, as described above, by delaying the start of the chemical reaction in the second reaction vessel 22, excessive chemical reaction in the second reaction vessel 22 can be suppressed. In addition, this makes it possible to suppress thermal energy required when the chemical heat storage material 18 is regenerated in the second reaction vessel 22.

[Fifth Embodiment]
In FIG. 9, the chemical heat storage device 50 according to the present embodiment includes one reaction vessel 70, a first evaporative condenser 71, a second evaporative condenser 72, and a third heat exchange unit 31.

  The reaction vessel 70 has a chemical heat storage material 18 that generates heat due to a chemical reaction with the reaction material 16 and from which the reaction material 16 is desorbed when heated. The reaction vessel 70 is provided with a heat recovery device 24 and a first regeneration heat source 41.

  The first evaporative condenser 71 is an evaporator that stores the reaction material 16, evaporates the reaction material 16, and supplies the reaction material 16 to the reaction vessel 70. The second evaporative condenser 72 is a condenser that condenses and recovers the reaction material 16 desorbed from the chemical heat storage material 18. The reaction vessel 70 is connected to the first evaporative condenser 71 and the second evaporative condenser 72 via a bifurcated communication pipe 84. A valve 81 is provided on the first evaporating condenser 71 side of the communication pipe 84, and a valve 82 is provided on the second evaporating condenser 72 side. Instead of the valves 81 and 82, a three-way valve may be provided at the bifurcated portion of the communication pipe 84.

  The third heat exchange unit 31 is a heat exchange means that enables heat exchange between the first evaporative condenser 71 and the second evaporative condenser 72. The third heat exchanging unit 31 is configured, for example, by connecting heat exchangers 76 and 78, a valve 74, and a pump 80 in series by a pipe 86. A heat medium (not shown) is circulated between the first evaporative condenser 71 and the second evaporative condenser 72 through the pipe 86 by the pump 80.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the diagram of FIG. 10, T _S , T _E , and T _C mean the following temperatures, respectively.

T _S : outside air temperature T _E : temperature of the first evaporative condenser 71 T _C : temperature of the second evaporative condenser 72

  9 and 10, in the chemical heat storage device 50 according to this embodiment, when the chemical heat storage material 18 and the reaction material 16 are chemically reacted (hydration reaction) in the reaction vessel 70, the valve 82 of the communication pipe 84 is set. In the closed state, the valve 81 of the communication pipe 84 and the valve 74 of the third heat exchange unit 31 are opened. Thus, the reaction material 16 can be evaporated by the first evaporation condenser 71 and supplied to the reaction vessel 70.

  At this time, in the first evaporation condenser 71, latent heat of evaporation is generated by the evaporation of the reaction material 16. This latent heat of evaporation is supplied to the second evaporating condenser 72 via the third heat exchanging portion 31 and stored there. In other words, as shown in the diagram of FIG. 10, when the temperature of the reaction material 16 in the first evaporation condenser 71 decreases due to latent heat of evaporation, the second evaporation condenser 72 is passed through the third heat exchange unit 31. Heat is removed, and the temperature of the reaction material 16 in the second evaporative condenser 72 also decreases. Thereby, the latent heat of evaporation generated in the first evaporative condenser 71 can be stored in the second evaporative condenser 72.

  The hydration reaction in the reaction vessel 70 continues until the reaction material 16 cannot be bonded to the chemical heat storage material 18 (section K in the diagram of FIG. 10). Although the valve 81 is closed at the timing when the hydration reaction is completed, since the heat exchange by the third heat exchange unit 31 is continued, the reaction material 16 in the first evaporation condenser 71 and the second evaporation condenser 72 The temperature of the reaction material 16 becomes equal at the point p1. Here, the valve 74 of the third heat exchange unit 31 is closed, and the heat exchange is temporarily stopped.

  Next, when regenerating the chemical heat storage material 18 for which the hydration reaction has been completed, the valve 74 of the third heat exchange unit 31 is opened again, and the valve 82 of the communication pipe 84 is opened. Then, the reaction material 16 desorbed from the chemical heat storage material 18 in the reaction vessel 70 returns to the second evaporation condenser 72 through the communication pipe 84 and is condensed and stored in the second evaporation condenser 72. At this time, latent heat of condensation is generated in the second evaporative condenser 72, and the latent heat of evaporation stored in the second evaporative condenser 72 during the above-described hydration reaction can be used as the cooling heat source.

In other words, in the diagram of FIG. 10, the p2 point a playback start of the chemical heat storage material 18, the temperature T _C of the second evaporative condenser 72, since lower than the outside air temperature T _S, the The temperature rise of the second evaporating condenser 72 due to the partial condensation latent heat can be suppressed.

  Dehydration from the chemical heat storage material 18 continues until the reaction material 16 is completely detached from the chemical heat storage material 18 (section L in the diagram of FIG. 10). When the regeneration of the chemical heat storage material 18 is completed, the valve 82 is closed. However, since the heat exchange by the third heat exchange unit 31 continues, the reaction material 16 in the first evaporation condenser 71 and the second evaporation condensation are obtained. The temperature of the reaction material 16 in the vessel 72 becomes equal at the point p3. In other words, the latent heat of condensation generated in the second evaporative condenser 72 is stored in the first evaporative condenser 71 via the third heat exchange unit 31. Here, the valve 74 of the third heat exchange unit 31 is closed, and the heat exchange is temporarily stopped.

  When heat demand occurs, the valve 81 of the communication pipe 84 is opened again, and the chemical heat storage material 18 and the reaction material 16 are again chemically reacted (hydration reaction) in the reaction vessel 70 (section M). At this time, latent heat of vaporization of the reaction material 16 is generated in the first evaporative condenser 71. As the heat source, the latent heat of condensation stored in the first evaporative condenser 71 at the time of dehydration can be used.

In other words, in the diagram of FIG. 10, the point p4 is upon hydration the start of the chemical heat storage material 18, the temperature T _E of the first evaporative condenser 71, so is higher than the outside air temperature T _S, Accordingly, the temperature drop of the first evaporative condenser 71 due to the latent heat of vaporization can be suppressed.

  Thus, according to the present embodiment, it is possible to effectively use latent heat between the first evaporative condenser 71 and the second evaporative condenser 72 to increase the energy utilization rate.

  In addition, the structure of the 3rd heat exchange part 31 is not restricted to this, The heat exchange between the 1st evaporative condenser 71 and the 2nd evaporative condenser 72 should just be possible.

[Other Embodiments]
Although the 1st reaction container 12 and the 2nd reaction container 22 were mentioned as a some reaction container, three or more reaction containers may be sufficient.

  The above embodiments can be used in appropriate combination.

DESCRIPTION OF SYMBOLS 10 Chemical heat storage apparatus 11 1st heat exchange part 12 1st reaction container 14 Evaporation condenser 16 Reaction material 18 Chemical heat storage material 20 Chemical heat storage apparatus 21 2nd heat exchange part 22 2nd reaction container 30 Chemical heat storage apparatus 31 3rd heat exchange Part 36 heat recovery device 40 chemical heat storage device 50 chemical heat storage device 62 temperature measuring device 70 reaction vessel 71 first evaporative condenser 72 second evaporative condenser

Claims (4)

A plurality of reaction containers having a chemical heat storage material that generates heat due to a chemical reaction with the reaction material and from which the reaction material is desorbed by being heated;
An evaporative condenser for storing the reaction material, supplying the reaction material to the reaction vessel, and recovering the reaction material desorbed from the chemical heat storage material;
A first heat exchanging section that enables heat exchange by circulating a heat medium between the plurality of reaction vessels;
And a second heat exchanger that enables heat exchange by circulating the heat medium between said reaction vessel of each said evaporative condenser,
The first heat exchange unit is configured by connecting pipes for passing the heat medium between the plurality of reaction vessels and the evaporation condenser in the second heat exchange unit by a bypass pipe,
A chemical heat storage device in which a heat exchanger provided in each reaction vessel is shared by the first heat exchange unit and the second heat exchange unit . The chemical heat storage device according to claim 1 , further comprising a temperature measuring device provided in the evaporative condenser. The chemical heat storage device according to claim 1, further comprising a heat recovery unit provided in the evaporative condenser. As the evaporative condenser,
A first evaporative condenser for storing the reaction material, evaporating the reaction material and supplying the reaction material to the reaction vessel;
A second evaporative condenser for condensing and recovering the reaction material desorbed from the chemical heat storage material,
Chemical heat storage device according to any one of claims 1 to 3 comprising a third heat exchanger that enables the heat exchange between the second evaporative condenser and the first evaporator condenser .

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