JPH05322465A - Heat accumulating system - Google Patents

Abstract

PURPOSE:To provide a heat accumulating system in which an emulsion type latent heat accumulating material is used and a circulation of the latent heat accumulating material to a radiator is facilitated. CONSTITUTION:A heat accumulation system is comprised of a heat accumulating tank 1 having a heat exchanger 4 in it and a pipe 6 connected to a lower part of the heat accumulation tank 1, having an aspirator 7, a transporting pump 8, two three-way changing-over valves 9 and 10, a radiator 11, a continuous phase separating device 15, a circulating pump 14 and a bypassing pipe 13 and further connected to return back to the upper part of the heat accumulating tank 1. The bypassing pipe 13 has the circulating pump 14 and is connected to the two three-way changing-over valves 9 and 10 so as to hold the radiator 11. As the latent heat accumulating material, either emulsion state or suspension state latent heat accumulating material is used, wherein a dispersion phase composed of parafin, oil and fat or orefin having a higher melting point than that of a continuous phase is dispersed into the continuous phase comprised of etylene glycol aqueous solution, propylene glycol aqueous solution or pure water.

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 or carrying heat by using a latent heat storage material (hereinafter referred to as PCM) which utilizes latent heat generated by a phase change. ..

[0002]

2. Description of the Related Art A conventional heat storage system using an emulsion type latent heat storage material has a heat storage phase 16 having a heat exchanger 18 therein and a transfer pump 22 connected to the heat storage phase 16, as shown in FIG. The structure has three-way switching valves 26, 27 and a radiator 23 arranged between the three-way switching valves 26, 27 and a branch pipe having a circulation pump 25.

[0003]

In a heat storage system using a conventional emulsion-type latent heat storage material, when the latent heat storage material has a high concentration, it is conveyed to the radiator 28.
Needed a special pump. In order to solve this problem, it is necessary to store a low-concentration latent heat storage material (with a small amount of dispersed phase) in the heat storage tank 16 for easy transportation, but in this case, the heat storage tank becomes large. There was a drawback that it would end up.

[0004]

The gist of the present invention is to provide a heat storage tank 1 having a heat exchanger 4 therein and the heat storage tank 1.
Connected to the lower part of the aspirator 7, transport pump 8,
It has two three-way switching valves 9, 10, a radiator 11, a continuous phase separator 15, a circulation pump 14, a radiator 15, and a bypass pipe 13 and is connected to return to the upper part of the heat storage tank 1. The bypass pipe 13 has a circulation pump 14, and two bypass pipes 13 are provided to sandwich the radiator 11.
Connected with the one-way switching valves 7 and 10, the latent heat storage material is a continuous phase consisting of an aqueous solution of ethylene glycol, an aqueous solution of propylene glycol, or just water. Paraffin, oil or olefin having a higher melting point (same as the freezing point) than the continuous phase. The heat storage system is characterized by using an emulsion formed by dispersing the dispersed phase or a latent heat storage material in a suspended state.

[0005]

[Operation] In the heat storage system of the present invention, at the time of heat storage, the latent heat storage material of high concentration is stored as it is, and when releasing heat, the substance forming the continuous phase is supplied by the aspirator at the outlet of the heat storage tank to reduce the concentration. The heat storage effect is enhanced by returning the latent heat storage material to the heat storage tank 2 by increasing the concentration again by the continuous phase paper separating device before transferring the heat storage tank 2 to the radiator 11 and returning it to the heat storage tank 2. ..

The latent heat storage material whose concentration has been reduced can be conveyed by a general pump and also has a good heat exchange performance in the radiator.
There is an advantage that.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the heat storage system of the present invention is shown in FIG.
A description will be given based on the operating conditions of the examples. First, in the heat storage mode, heat is stored in the latent heat storage material 2 by receiving heat from the heat exchanger 4 in the heat storage tank 1. Since the latent heat storage material 2 in the heat storage tank 1 has a high viscosity, bypass pipes are connected between the upper and lower sides of the heat storage tank 1 so that convection is facilitated, and the property of the heat storage material that allows easy temperature stratification is utilized. You may store heat.

Next, the case of the heat radiation mode will be described. When the transport pump 8 is driven, the high-viscosity heat storage material starts to slowly flow through the pipe 6, and at the same time, the continuous phase of the ethylene glycol aqueous solution or the like is piped by the aspirator 7.
In the outlet pipe 6 of the aspirator 7, which is supplied inside, the high viscosity latent heat storage material 2 and the continuous phase are agitated to dilute the dispersed phase. At this time, the rotation speed of the transfer pump 8 is made variable. As a result, the amount of continuous phase supplied into the pipe 6 can be adjusted. The thinned latent heat storage material 2 is conveyed to the radiator 11 through the pipe 6, and the fact that the stored latent heat storage material 2 has entered the radiator 11 is sensed by a temperature detector or the like. The three three-way switching valves 9 and 10 are switched, the transport pump 7 is stopped, a closed loop composed of the radiator 11 and the circulation pump 14 is formed, and when the circulation pump 14 is driven, the latent heat storage material 2 causes the bypass pipe 13 to flow. It will circulate. The above operation is repeated until the latent heat storage material 2 completely radiates heat. After confirming that the heat is completely dissipated, the circulation pump 14 is stopped and the two three-way switching valves 9 and 10 are switched, and the radiator 11
When the transfer pump 8 is driven by forming a loop of the heat storage layer 2 and the latent heat storage material 2, the latent heat storage material 2 begins to flow through the pipe 6, passes through the continuous phase separator 15, separates the continuous phase, and is concentrated in the heat storage tank. 1 Returned to the top.

The continuous phase separating device 15 serves to separate only the continuous phase of the heat storage material 2 and restore the concentration of the dispersed phase of the latent heat storage material 2 to the original level. Therefore, the continuous phase separation device 1
5 is formed by using a tank in which a heater for heating and scattering the continuous phase is used, or by using a separation membrane that allows only the continuous phase to permeate and flow out.

As described above, the heat of the latent heat storage material 2 stored in the heat storage tank 1 is radiated by repeating the batch process in which it is repeatedly sent to the closed loop composed of the radiator 11 and the circulation pump 14.

[0011]

As described above, according to the present invention, since the latent heat storage material having a high concentration stored in the heat storage tank is diluted in the continuous phase and then sent to the radiator, the circulation of the latent heat storage material is prevented. Can be easy.

Further, when the heat is collected in the heat storage tank, the continuous phase is removed by the continuous phase separator and then collected, so that the heat can be efficiently stored again. Therefore, the heat storage phase can be made compact, and the heat dissipation rate can be changed by changing the dilution ratio in the continuous tank.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a heat storage system of the present invention.

FIG. 2 is a schematic diagram showing a conventional heat storage system.

[Explanation of symbols]

 1 Heat Storage Tank 2 Latent Heat Storage Material 3 Heat Source 4 Heat Exchanger 5 Stirrer 6 Piping 7 Aspirator 8 Transport Pump 9 3 Way Switching Valve 10 3 Way Switching Valve 11 Radiator 12 Blower 13 Bypass Piping 14 Circulation Pump 15 Continuous Phase Separator 16 Heat storage tank 17 Latent heat storage material 18 Heat exchanger

[Procedure amendment]

[Submission date] November 24, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

[0005]

[Operation] In the heat storage system of the present invention, at the time of heat storage, the latent heat storage material of high concentration is stored as it is, and when releasing heat, the substance forming the continuous phase is supplied by the aspirator at the outlet of the heat storage tank to reduce the concentration. and easily transported and conveyed to the radiator 11 from Te, to enhance the heat accumulation effect in the high concentration again by the continuous phase separated system short of returning to the heat storage tank 2 so as to return the latent heat storage material in the thermal storage tank 2 ..

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

Claims (1)

[Claims] 1. A heat storage tank 1 having a heat exchanger 4 inside and a lower portion of the heat storage tank 1 connected to an aspirator 7, a transfer pump 8, two three-way switching valves 9, 10, a radiator 11,
Continuous phase separation device 15, circulation pump 14, radiator 15,
And a pipe 6 having a bypass pipe 13 and connected to return to the upper part of the heat storage tank 1.
Is connected to two three-way switching valves 7 and 10 so as to sandwich the radiator 11 with a circulation pump 14, and as a latent heat storage material, an ethylene glycol aqueous solution, a propylene glycol aqueous solution, or a continuous phase consisting of simple water, A heat storage system characterized by using an emulsion or a latent heat storage material in a suspended state in which a dispersed phase composed of paraffin, oil or olefin having a higher melting point (same as the freezing point) than the continuous phase is dispersed.