JPH0611285A - Heat accumulating system - Google Patents

Abstract

PURPOSE:To enhance efficiency at the time of heat accumulation and radiation in a heat accumulating system using a highly viscous emulsion type latent heat accumulating material. CONSTITUTION:The heat accumulating system is provided with a heat accumulating tank 1 having a heat exchanger 3 in its interior and two pipes 21 and 23, each of which is connected at one end to the lower part of the heat accumulating tank 1, and the pipe 21 is connected at other end to the upper part of the heat accumulating tank 1 and has provided thereon a three way valve 5, a feed pump 7, a three way valve 6, a radiator 9 and a bypass 22. The bypass 22 is connected at one end to the three way valve 5 and at the other end to a juncture between the heat accumulating tank 1 and the radiator 9 and the pipe 23 is connected at the other end of the three way valve 6. For use as the latent heat accumulating material 2, is provided an emulsion or suspension having dispersed on a continuous phase consisting of an aqueous ethylene glycol solution, an aqueous propylene glycol solution or plain water a dispersed phase having a higher fusing point (the same as solidifying point) than that of the continuous phase and consisting of paraffin, fats and oils and olefin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for storing heat or carrying heat by using a latent heat storage material that utilizes latent heat generated by a phase change.

[0002]

2. Description of the Related Art Conventional latent heat storage material 1 in emulsion state
As an example of the heat storage system using 6, as shown in FIG.
A simple dispersion device 1 such as a heat exchanger 18 and a stirrer inside
5, a heat storage tank 17 having 5 and a pipe 11 having a pump 12 and a radiator 13 are connected to the heat storage tank 17.

[0003]

In the conventional heat storage system using the latent heat storage material in the emulsion state, since the latent heat storage material has a high viscosity, the stored latent heat storage material is hard to move from the periphery of the heat exchanger. As for the delivery to the radiator, the one with insufficient heat storage was likely to be delivered to the radiator, and the thermal efficiency was likely to be insufficient.

[0004]

The gist of the present invention is that a heat storage tank 1 having a heat exchanger 3 inside and two pipes 21 and 23 connected to the lower portion of the heat storage tank 1 are connected to each other. Two
1 has a three-way switching valve 5, a transfer pump 7, a three-way switching valve 6, a radiator 9 and a bypass pipe 22 and is connected so as to return to the upper part of the heat storage tank 1. The other pipe 23 connected from the three-way switching valve 5 between the heat storage tank 1 and the radiator 9 and connected to the lower portion of the heat storage tank 1 is connected to the three-way switching valve 6. As the latent heat storage material 2, a continuous phase composed of an ethylene glycol aqueous solution, a propylene glycol aqueous solution, mere water, or the like has a melting point (same as the freezing point) than the continuous phase.
A heat storage system characterized by using an emulsion or a suspension in which a dispersed phase composed of high-paraffin, oil and fat, olefin, etc. is dispersed.

[0005]

[Operation] When storing heat, take out the latent heat storage material from the upper part of the heat storage tank and store it in the lower part of the heat storage tank. When radiating heat, the latent heat storage material is taken out from the lower part of the heat storage tank, radiated by a radiator and returned to the upper part of the heat storage tank.

In either case, since the latent heat storage material has a high viscosity, it does not diffuse and a temperature stratification can be successfully formed in the heat storage tank.

[0007]

EXAMPLE Next, the operating condition of the heat storage system of the present invention will be described with reference to FIG. First, in the cold heat storage mode (operating condition during heat storage), heat is stored by receiving heat from the heat exchanger 3 in the heat storage tank 1. In this case, the three-way switching valve 15 and the three-way switching valve 26 are
The heat storage material 2 is switched so as to flow in the direction of the arrow in FIG.
The latent heat storage material 2 is supplied from the upper part of the heat storage tank 1 to the bypass pipe 22,
When the heat storage operation that flows to the three-way switching valves 5 and 6, the pipe 23, and the lower part of the heat storage tank 1 is started, the latent heat storage material 2 has a large viscosity and is hardly stirred, and only the upper part of the heat storage tank 1 is cooled. Phase change from emulsion to suspension. After being cooled to some extent, the transport pump 7 is driven to cool the latent heat storage material (suspension state)
Are transported to the lower part of the heat storage tank 1. The transported latent heat storage material 2 has a large specific gravity and a large viscosity, and thus is accumulated in the lower portion of the heat storage tank 1 without being diffused. By repeating the above operation, the latent heat storage material 2 that has stored heat from the lower portion of the heat storage tank 1 is stored.

Next, the heat dissipation mode (operating condition during heat dissipation) will be described with reference to FIG. In this case, as shown in the figure, the three-way switching valve 15 and the three-way switching valve 26 are switched so that the latent heat storage material 2 flows in the arrow direction of FIG. The latent heat storage material 2 returns from the lower part of the heat storage tank 1 to the upper part of the heat storage tank 1 through the radiator 9. When the transfer pump 7 is driven, the latent heat storage material 2 (suspension state) is taken out from the lower part of the heat storage tank 1, enters the radiator 9, and releases the heat in the radiator 2 to be returned to the upper part of the heat storage tank 1. Be done. When the flow rate is set to an appropriate value, the latent heat storage material 2 can be completely phase-changed at the inlet and outlet of the radiator 9 to be in an emulsion state. As in the heat storage mode, the latent heat storage material 2 has a large viscosity and the emulsion has a smaller specific gravity than the suspension, so that the latent heat storage material returned to the heat storage tank 1 undergoes temperature stratification without diffusion. Easy to make. Heat is radiated by continuing the above operation.

By repeating the above, heat storage
Heat is released.

[0010]

As described above, according to the present invention, it is difficult to mix the latent heat storage material that stores heat with the latent heat storage material that has not yet stored heat or the latent heat storage material that has finished radiating heat, and the latent heat storage material that has stored heat is used for radiating heat. Since it is turned, the efficiency of heat storage and heat dissipation is extremely good.

[Brief description of drawings]

FIG. 1 is a schematic piping diagram of a heat storage system of the present invention.

FIG. 2 is an operation status diagram of the above.

FIG. 3 is an operation status diagram of the above.

FIG. 4 is a schematic piping diagram of a conventional heat storage system.

[Explanation of symbols]

 1 Heat Storage Tank 2 Latent Heat Storage Material 21 Piping 22 Bypass Pipe 23 Piping 5 3 Way Switching Valve 6 3 Way Switching Valve 7 Transport Pump 9 Radiator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masasuke Tsukamoto, 1048 Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works Co., Ltd. (72) Toshiki Tamura, 1048, Kadoma, Kadoma, Osaka City, Matsushita Electric Co., Ltd.

Claims (1)

[Claims] 1. A heat storage tank 1 having a heat exchanger 3 inside, and two pipes 21 and 23 connected to a lower portion of the heat storage tank 1, the pipe 21 being a three-way switching valve 5, a transfer pump 7, A three-way switching valve 6, a radiator 9 and a bypass pipe 22 are connected so as to return to the upper part of the heat storage tank 1. The bypass pipe 22 is connected from the three-way switching valve 5 to the heat storage tank 1 and the radiator 9. And the other pipe 23 connected to the lower part of the heat storage tank 1 is connected to the three-way switching valve 6
The latent heat storage material 2 is a continuous phase composed of an aqueous solution of ethylene glycol, an aqueous solution of propylene glycol, or mere water, etc. A heat storage system characterized by using an emulsion or suspension in which phases are dispersed.