JPS6020088A - Chemical heat storage device - Google Patents

Abstract

PURPOSE:To enable to quickly release and store the heat by a method wherein the major part of first substance is transferred in liquid state. CONSTITUTION:A liquid phase transfer tube 9 together with a gaseous phase transfer tube 6 is provided between a first vessel 1V and a second vessel 2V in order to transfer first substance 1M. Thus, the major part of the first substance 1M can be transferred in liquid state. Accordingly, the release and storage of heat can be performed quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a chemical heat storage device that extracts heat using the reaction heat of a substance and stores heat by thermal decomposition.

[Background of the invention]

Conventionally, a chemical heat storage device as described in Japanese Patent Application Laid-Open No. 57-16797 is known.

To explain this with reference to FIG.
A container ZV and a first container IV containing 1M of a first substance (water, methanol, chlorofluorocarbons, ammonia sodium chloride) are connected by a gas phase transfer pipe 6 having pulp 5, and a second container 2V A high-temperature heat medium (oil, water, freon, etc. heated to a high temperature using factory exhaust heat) is poured into the heat exchanger 7 prepared for the second
The first substance IM attached or adsorbed to the substance 2M of
Pyrolyze. The first substance IM decomposed into a gaseous phase passes through the pipe 6, reaches the first container 1v, and is liquefied. When the decomposition is completed, the pulp 5 is closed and heat storage is completed (the state shown in FIG. 1). In addition, since condensation heat is generated when the first substance IM liquefies, the heat is removed by a heat exchanger 8 in which a low-temperature heat medium (seawater, cold water, air, etc.) is passed, and this heat is used for heating, etc. Ru.

When the stored heat is taken out at a desired time, the pulp 5 is opened, the first substance IM is heated and evaporated in the heat exchanger 8, and the first substance IM is phase-shifted into the first container IV. and react with a second substance. The heat generated by the reaction is extracted by a heat medium flowing into the heat exchanger 7 and used for hot water supply, space heating, etc.

However, in such a chemical heat storage device, the transfer of the first substance IM from the first container IV to the second container 2V and the transfer in the opposite direction thermally decompose or evaporate the first substance IM, resulting in gas generation. Since the heat is transferred in a phased state, it takes time to extract the heat, and it also takes time to store the heat.

[Purpose of the invention]

The purpose of the present invention is to eliminate the drawbacks of the above-mentioned chemical heat storage devices,
It is an object of the present invention to provide a chemical heat storage device in which heat can be quickly extracted by transferring most of the first substance in a liquid phase state, and heat can be stored quickly as well.

[Summary of the invention]

The chemical heat storage device of the present invention extracts heat by reacting a first substance and a second substance, and adds heat to the substance generated by the reaction, thereby combining the first substance and the second substance. A first container for storing the first substance and a second container for storing the second substance, in which the heat dissipation and heat storage are performed alternately. There it is,
A gas phase transfer tube having a pulp for transferring a first substance in a gas phase to the first and second containers; and a liquid phase transfer tube having a pulp for transferring a first substance in a liquid phase to the first and second containers. It is characterized by comprising a tube.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

In FIGS. 2 to 4, parts equivalent to those in FIG. 1 are designated by the same reference numerals. In FIG. 2, the second container 2■ and the first container 1■ are connected by a liquid phase transfer pipe 9 for transferring the first substance IM in a liquid phase. A pulp 10 is provided to block the flow. If necessary, a heater 11 for heating and decomposing the second substance 2M and first substance IM may be provided in the second container 22. Moreover, if the first container 1v is provided at a higher position than the second container 2V, the first
Gravity can be used to transport the substance IMQ in the liquid phase (described in detail below).

In the above configuration, when the first substance IM is transferred to the first container IV to store heat, the pulp 5 is closed and the valve 0 is opened, and the heat exchanger 7 transfers the first substance IM in the first container 1 Heat IM and 2M of second material. first substance I
When M is thermally decomposed and the internal pressure increases, the liquid phase first substance IM passes from the second container 2V through the liquid phase transfer pipe 9 to the first container IV.
will be transferred to. When the transfer is finished, close the pulp 1o,
Open pulp 5. Thereafter, the first substance IM that is about to adhere or adsorb to the second substance 2M is decomposed and evaporated, and the gas phase is transferred to the first container 1v through the gas phase transfer pipe 6.

When the transfer is completed, the pulp 5 is closed and heat storage is completed. Note that in the first container IV, the heat of condensation is removed by the heat exchanger 8 through which a low-temperature heat medium flows, and the heat of condensation may be used for heating, etc., as described above.

As mentioned above, most of the first substance IV is transferred to the first container 1■ in a liquid phase, and only the substance stuck or adsorbed to the second substance 2M is evaporated and transferred. The time required for the transfer is shorter than in a conventional chemical heat storage device in which the first substance IM is completely thermally decomposed and evaporated before being transferred, and furthermore, the amount of heat required for the transfer is also smaller. According to experiments, the volume of each of the first and second containers is 80 tons, the diameter of the gas phase transfer pipe is 100 rranφ, the length of the tube is 2 m1, the diameter of the liquid phase transfer tube is 10 mm, and the length of the tube is 2 m. It was possible to shorten or save time by 80% and heat by 30%.

In addition, when the stored heat is taken out at a desired time, when the valves 5 and 10f are opened, most of the first substance IM remains in the liquid phase and is transferred to the second container 2 through the liquid phase transfer pipe 9. is,
A portion is evaporated and transferred through the gas phase transfer pipe 6. Therefore, the first substance IM and the second substance M generate reaction heat in the second container 2, and if this is removed by the heat exchanger 7, the reaction heat can be taken out, that is, the accumulated heat can be taken out. Even if some of the first substance IM is transferred by evaporation, the majority of the first substance IM is transferred in the liquid phase, so the transfer takes only a short time as in the case of heat storage. Accumulated heat can be removed quickly. In addition, when heating the second container 2V to decompose the first substance IM, the heater 11 may be used as an auxiliary heating means or may be used alone, but if the power is used, the heat storage can be reduced. It can be done cheaply.

In addition, when a granular material is used as the second material 2M, in a conventional chemical heat storage device, the thermal resistance from the second material 2M to the outer surface of the second container 2 is extremely large, and therefore the heat dissipation rate is slow. However, according to this embodiment, the second container 2V
The first substance IM in the liquid phase directly enters the inside of the tube, and when heat is generated, a multiphase flow state of the liquid phase and the gas phase is created.Therefore, the internal resistance is significantly reduced and the heat dissipation rate is increased.

As described above, according to this embodiment, heat extraction and heat storage cause most of the first substance to be transferred while remaining in the liquid phase.
Compared to conventional chemical heat storage devices, it has the effect of being faster, and even if a granular material is used as the second material, it is not affected by internal thermal resistance. The heat dissipation rate is equivalent to that obtained using .

FIG. 3 shows another embodiment of the present invention, in which a pump 12 is provided in the liquid phase transfer pipe 9, and the second container 2v and the first container IV are directly connected by a liquid phase transfer pipe 13. The liquid phase transfer pipe 13 is provided with a valve 14 .

In the above configuration, in the case of heat storage, the valve 14 is closed and the valves 5 and 10 are opened, and after the first substance in the liquid phase in the second container 2■ is transferred to the first container 1■ by the pump 12, , which closes the valve 10. Thereafter, the first substance IM attached to or adsorbed on the second substance 2M is decomposed and evaporated, and transferred to the first container 11 through the gas phase transfer pipe 6.

After the transfer is completed, the valve 5 is closed to complete heat storage.

When removing the stored heat, by opening the valves 5 and 14, most of the first substance IM is transferred directly from the liquid phase transfer pipe 14 to the second container 22. first substance IM
A part of the gas phase shift tube 6 evaporates as in the embodiment shown in FIG.
and is transferred to the second container 2V. In addition, in order to widely disperse the first substance IM in the second substance 2M and cause the reaction to occur effectively, it is recommended to branch the opening of the gas phase transfer pipe 13 and provide a large number of them on the ceiling of the second container 2v. good.

'As mentioned above, even if a part of the first substance is decomposed and transferred in this example, most of the first substance is transferred in the liquid phase, so heat can be extracted and stored quickly. In this embodiment, since the heat is transferred directly from the liquid phase transfer pipe 13, which is shorter than in the embodiment shown in FIG.

FIG. 4 shows still another embodiment of the present invention, in which the first container 1
A heater 15 is provided in the liquid phase transfer tube 9 at a portion close to the liquid phase transfer tube 9. Since the opening of the liquid phase transfer tube 9 is provided at the ceiling of the first container 1, the valve 10 is not necessarily provided. Not necessary.

In the above configuration, in the case of heat storage, the valve 14 is closed and the valve 10 is opened, and the first substance IM in the liquid phase transfer pipe 9 is heated by the heater 15, and the pumping action of the bubbles generated when it boils is used. The first substance IM is then transferred to the first container 1.

After that, the pulp 10 is closed, and a high-temperature heat medium is passed through the heat exchanger 7, and the first substance attached or adsorbed to the second substance 2M is
The substance IM is thermally decomposed and the gas phase is transferred to the first container 1 through the gas phase transfer pipe 6.

The case of storing/extracting heat is the same as the embodiment shown in FIG. 3 above.

As described above, according to this embodiment, in addition to the effects obtained in the embodiment of FIG. 3, there is an effect that a chemical heat storage device with fewer mechanically moving parts can be obtained.

FIGS. 5 to 7 are examples of water heaters or hot air devices to which the chemical heat storage device of the present invention is applied.

FIG. 5 shows an example of a water heater, in which the tank 16 is divided into two parts by a partition plate 17, and a first tank with water 18 is provided in the upper space.
A second container 2V is provided in the lower space, and the containers are connected like the heat storage device in FIG. 2 described above. One end of the tube of the heat exchanger 19 is open to the water 18, and the other end is outside the tank 16 and is provided with pulp 20. Further, in the upper space of the partition plate 17, a water supply pipe 22 having pulp 21 is provided.

In the above configuration, heat storage is performed in the same manner as in the chemical heat storage device shown in FIG. 2, but the condensation heat generated when the first substance IM is liquefied in the first container 1v preheats the water 18. Hot water is obtained by opening the pulps 5 and 10 to generate reaction heat in the second container 22, and passing the drained water 18 through a heat exchanger 19.

FIG. 6 shows another example of a water heater, in which two types of hot water with different temperatures can be obtained, in which one end of the pipe of the heat exchanger 19 is connected to a water source, and a separate hot water supply is installed near the surface of the water 18. A take-out pipe 23 and a pulp 24 are provided.

In the above configuration, the water that has passed through the heat exchanger 19 receives the reaction heat in the second container 2V and becomes high-temperature hot water, and the water 18 also receives the condensation heat from the first container 1 during heat storage. As a result, the hot water is at a low temperature, so in the end, you can obtain hot water at two different temperatures.

FIG. 7 is an example of a hot air device.

In the figure, the chemical heat storage device shown in FIG. 2 is housed in the envelope 25, and the heat storage material 26 (water, inorganic hydrated salt such as magnesium chloride hexahydrate, magnesium, etc.) is placed around the first container IV. A heat storage container 27 filled with is provided. A fan 28 is provided near the absorber 2, and a fan 28' is provided near the heat storage container 27.

In the above configuration, the heat of condensation of the first substance IM in the gas phase is transferred from the liquid phase transfer pipe 9 and the gas phase transfer pipe 6 to the container 1 of the first substance IM and passed through the gas phase transfer pipe 6. Heat is stored in the heat storage material 26. During hot air heating, first substance IM=i second container 2
The reaction heat generated in the second container 2v and the heat of the heat storage material 26 are sent to the outside of the envelope 25 through the fan 28 and the fan 28' to obtain hot air. fan 2
If the fan 8 and the fan 28' are operated at different times and are operated independently, hot air having different temperatures can be generated.

In addition, in the hot air device shown in FIG. 7, heat storage is carried out in the first container 1A.
This is done using a heat storage container 27 provided around the 8th
As shown in the figure, the gas phase transfer pipe 6 is meandered to form a pipe-shaped first pipe.
When the first container IVk is used, heat may be stored in a number of heat storage containers 27 provided outside the first container IV. In this way, hot air can be obtained more efficiently by increasing the heat transfer area.

As described above, this hot air device has the effect of storing a large amount of heat in a small heat storage device and quickly producing hot air at a desired time.

〔Effect of the invention〕

As explained above, according to the present invention, in order to transfer the first substance, the liquid phase transfer tube is provided between the first and second containers together with the gas phase transfer tube. It becomes possible to transfer most of the heat to the liquid phase, thereby providing a heat storage device that can rapidly extract heat and similarly rapidly store heat.

In addition, as an incidental effect, even when a granular material is used as the second material, the liquid phase material directly enters the first container, creating a multiphase flow state, so it is not affected by internal thermal resistance. There is also the effect that a chemical heat storage device having a high heat dissipation rate equivalent to that obtained by using a liquid-phase substance as the second substance can be obtained.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional chemical heat storage device, and Figures 2 to 4 are
The figure is an explanatory diagram of an embodiment of the chemical heat storage device of the present invention, and Fig. 2 is an explanatory diagram of a device capable of transferring the first substance in a liquid phase to the second container through the entire heater. Fig. 3 is an explanatory diagram of an embodiment in which a pump is provided in the liquid phase transfer pipe to enable similar transfer, and Fig. 4 is an explanatory diagram of an embodiment in which a liquid phase transfer pipe heater is provided to enable similar transfer. 5 is an explanatory diagram of a hot water system to which the chemical heat storage device of the present invention is applied, FIG. 6 is an explanatory diagram of another hot water device, and FIG. Explanatory diagram of the wind device, Figure 8 is the 7th
It is an explanatory view of other examples of the heat storage container part in the warm air device of the figure. 1M...first substance, IV...first container, 2M...
...Second substance, 2■...Second container, 5,10,1
4゜20.21.24... Pulp, 6... Gas phase transfer tube, 7゜8.19... Heat exchanger, 9.13... Liquid phase transfer tube, 11.15... Heater, 12...pump,
16... Tank, 17... Partition plate, 22... Water supply pipe, 23... Hot water extraction pipe, 25... Envelope, 26... Heat storage material, 27... Heat storage container, 28.2
8'1.6 fans. Chiang 1 Figure 2 Figure 4

Claims (1)

[Claims] l. The first substance and the second substance are reacted to extract heat, and the first substance and the second substance are reacted by applying heat to the substance generated by the reaction. In a device that decomposes and stores heat, and alternately performs the above heat radiation and heat storage,
There is a first container that stores the first substance and a second container that stores the second substance, and the first substance is transferred in a gas phase to the first and second containers. 1. A chemical heat storage device comprising: a gas phase transfer tube having a valve metal for transferring pulp; and a liquid phase transfer tube having a pulp to be transferred in a liquid phase to first and second containers. 2. The chemico-thermal storage device according to claim 1, wherein the liquid phase transfer pipe is provided with a liquid transfer phase shift means. 3. A chemical heat storage device characterized in that the first container is located at a higher position than the second container. 4. The chemical heat storage device according to claim 3, characterized in that the second container is equipped with a heater as a liquid phase transfer means. 5. The chemical heat storage device according to claim 3, characterized in that the liquid phase transfer pipe is equipped with a pump as the phase shift transfer means. 6. The chemical heat storage device according to claim 3, characterized in that the liquid phase transfer pipe is equipped with a heater as the liquid phase transfer means. 7. Claim 5, characterized by comprising a liquid phase transfer pipe for transferring the first substance in a liquid phase to the first and second containers.
The chemical heat storage device according to item 6 or item 6.