JPH0571858B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an intermittent chemical heat pump device used as a thermal cycle device for cooling, heating, and hot water supply, and also used as a heat storage device.

Structure of a conventional example and its problems FIG. 1 shows an example of an intermittent chemical heat pump using solar heat, in which a container 1 heated by solar heat contains sodium thiocyanate and ammonia adsorbed thereon. This container is connected to a condensing container 5 via a pipe 3 and a valve 4. Now, when the container 1 is heated, the valve 4 is opened, and the cooling water pipe 6 provided in the condenser 5 is cooled, ammonia gas is generated from the container 1, and liquefied ammonia 8 is stored in the condenser 5.

If the valve 4 is closed when a sufficient amount of ammonia solution has been stored, the ammonia solution can be stored in that state. Next, when valve 4 is opened when there is no sunlight, such as at night, the ammonia liquid evaporates, and the ammonia is absorbed by the sodium thiocyanate in container 1 again, so condenser 5 becomes an evaporator, and when water is passed through cooling water pipe 6, cold water is generated. It can be grown.

There is almost no problem when using this device with such a combination of substances, but the substance that is separated, condensed, and evaporated is not a gas with high pressure in the operating temperature range, like ammonia in the current example. In the case of substances such as water that have low pressure in the operating temperature range, the pressure loss caused by piping 3 and valve 4 will be relatively large, so piping and valves with considerably large diameters will be required. Large valves are expensive, and automation is difficult due to the use of electromagnetic valves, which poses major obstacles to implementation.

OBJECT OF THE INVENTION It is an intermittent chemical heat pump device to provide a simple and low pressure loss device for isolating separated refrigerant and absorbent material for the purpose of long-term heat storage.

Structure of the Invention The present invention provides a container having a heat transfer means for condensing a refrigerant of an intermittent operating chemical heat pump device consisting of a refrigerant and an absorbent, and a container communicating with the container for storing the condensed liquid. This is an intermittent chemical heat pump device in which a valve that can be opened and closed is provided in the part that communicates the two containers, and a heat transfer means is also provided in the container that stores the condensate.

DESCRIPTION OF THE EMBODIMENT FIG. 2 is a diagram showing an embodiment of the present invention. An absorbent material 10 is housed in the container 9, and a heat transfer tube 11 is provided in thermal contact with the absorbent material 10. Absorbent material 1
For example, zeolite can be used as the refrigerant, and water is often used as the refrigerant adsorbed on this. When the zeolite that has now adsorbed water is heated by flowing hot water through the heat transfer tube 11, water vapor is generated. This water vapor, generally speaking, refrigerant vapor, flows through a thick pipe 12 to a condensing vessel 13. Inside this is a heat transfer tube 14 that cools the refrigerant vapor.
exists, and communicates with a condensate storage container 17 through a thin pipe 15 and a valve 16 at the bottom. The condensed liquid therefore flows into this storage container 17. At this time, in order to facilitate the inflow, this container is also provided with a heat transfer tube 18 to cool it.

When the heating temperature of the absorbent material and the condensing temperature of the refrigerant are determined, a certain equilibrium state exists, and the refrigerant does not condense any further, so if the heating is stopped at this point and the valve 16 is closed, this state will remain forever. When the valve 16 is opened for next use and the refrigerant is heated using the heat transfer tubes 14 and 18, the refrigerant moves in a liquid phase to the container 13, where it evaporates, causing the absorbent material 10 to generate heat and extracting heat from the heat transfer tubes 11. I can do it. Note that since the end of the pipe 15 is located at the bottom of the storage container 17, the refrigerant flowing from the storage container 17 to the condensation container 13 via the pipe 15 moves in a liquid phase. Furthermore, when the absorbent material 10 is cooled by the heat exchanger tube 11, the evaporation of the refrigerant 19 is promoted, and the temperature of the water flowing through the heat exchanger tubes 14 and 18 is lowered.
It can be used for cooling, etc.

It is also useful as a device for storing heat from the output of a compression type by using the condenser of a compression type air conditioner to heat the absorbent material and the evaporator of the air conditioner to cool it.

Now, if the condensation temperature is 30°C, the steam pressure will be 32 Torr, which is quite low when water is used as the refrigerant.
Conversely, when the refrigerant is evaporated and absorbed by an absorbent material, the pressure will be approximately 7 Torr if the steam temperature is set to 50°C for cooling purposes.

In this case, if the pipe diameter is 5 cm and the length is 60 cm, and the ratio of pressure loss due to the pipe to average pressure is kept to 2%, the cooling capacity will be approximately 4000 kcal/h.

This value corresponds to the capacity of a fairly large household air conditioner, but to achieve this, pipes of this thickness are required, and if a valve is installed in this as in the conventional example, , which requires a fairly large valve and is difficult to put into practice.

However, according to the present invention, what flows through the pipe 15 is not low-pressure steam but a liquid, so the volume is
Because it is small to 1/33000, the inner diameter is several mm.
A tube of approximately 100 mm is sufficient, and the valve may also be extremely small.

In particular, if the cooling heat transfer tubes 18 and 14 are connected in series as shown in the figure and the cooling water flows from 18 to 14, the pressure inside the refrigerant storage container 17 will be lower than the pressure inside the container 13, and the liquefied refrigerant will naturally flow. flows into the container 17. Conversely, when evaporating the refrigerant, by flowing water from 18 to 14, the pressure inside container 17 will decrease to 1.
3, the condensate naturally flows into the container 13.

Note that although this embodiment has described a cooling/heating method using a liquid, methods such as air cooling are of course also conceivable. Further, although an example has been shown in which the stored liquid naturally returns to the container 13 upon evaporation, it is of course possible to forcefully circulate the liquid using a pump or the like.

Effects of the Invention In the intermittent-operating chemical heat pump device of the present invention, high performance can be obtained even if pipes and valves with small diameters are used.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional intermittent chemical heat pump according to an embodiment of the present invention, and FIG. 2 is a block diagram of an intermittent chemical heat pump according to an embodiment of the present invention. 9... Absorbent container, 10... Absorbent material, 11...
Heat exchanger tube, 12... Piping (for refrigerant vapor), 13...
... Condensation container, 14, 18 ... Heat transfer tube, 15 ... Piping (for refrigerant liquid), 16 ... Valve, 17 ... Condensed refrigerant liquid storage container, 19 ... Liquefied refrigerant.

Claims (1)

[Scope of Claims] 1. The above-mentioned method comprises a first substance that can be condensed and vaporized in the temperature range used, and a second substance that can fix the first substance by adsorption or the like and can be released by heating. a first container containing a second substance;
a second container communicating with the first container to condense and evaporate the first substance; and a third container disposed below the second container to store a condensate of the first substance. a container, a heat transfer means provided in the second and third containers, a pipe communicating the second container and the third container, and an on-off valve provided in the pipe, An intermittent chemical heat pump device, characterized in that one end of the piping is located at the bottom of the third container. 2. An intermittent operating chemical heat pump device according to claim 1, wherein the first container is provided with heat transfer means. 3 The heat transfer means provided in the second and third containers are medium passages connected in series, and the heat transfer medium is allowed to flow from the third container side both when the first substance is condensed and when it evaporates. An intermittent chemical heat pump device as claimed in claim 1.