JPH06249588A - Heat storage tank - Google Patents

Abstract

PURPOSE:To provide a heat storage tank for storing heat in latent heat storage material with a simple structure without power required for agitating the material in the tank of a system for storing heat or transferring heat by using the material (emulsion state or a suspension state) utilizing latent heat generated upon phase change as transfer medium. CONSTITUTION:Several sets of heat exchangers 2 are vertically arranged therein, solenoid valves 3 are mounted at connectors of the exchangers 2 to a tube 4, and, as transfer medium to be poured therein, a latent heat storage material of emulsion state or suspension state in which dispersion phase (paraffin, oil and fat, olefin, etc.) having a higher melting point than that of a continuous phase (ethylene glycol aqueous solution, propylene glycol aqueous solution, or mere water) is disposed in the continuous phase is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage tank of a system for storing or transferring heat using a latent heat storage material (in an emulsion state or a suspension state) utilizing latent heat generated by a phase change as a carrier medium. It is about.

[0002]

2. Description of the Related Art A heat storage device using an emulsion-type latent heat storage material 5 as a heat storage medium has a heat storage tank 1 and a heat exchanger 4.
And has stored heat in the latent heat storage material 5 while stirring with the stirrer 10.

[0003]

In the conventional heat storage system, the heat storage tank has a complicated structure, resulting in a very expensive system. Also, this type of latent heat storage material can be transported, but when a heat exchanger is installed in the heat storage tank to store heat, the emulsion (suspension) has a higher viscosity than water and does not convection naturally, so the temperature gradient There was no power and power was needed to store heat while stirring.

[0004] Therefore, an object of the present invention is to provide a heat storage tank which can store heat of a latent heat storage material with a simple structure without requiring power for stirring.

[0005]

In order to solve the above-mentioned problems, the present invention arranges several sets of heat exchangers 2 in the vertical direction inside a heat storage tank 1 and connects each heat exchanger 2 with a pipe 4. The electromagnetic valve 3 is attached to the portion, and as a carrier medium to be injected into the heat storage tank 1, a continuous phase (ethylene glycol aqueous solution, propylene glycol aqueous solution, or just water) has a higher melting point (same as the freezing point) than the continuous phase. Dispersed phase (paraffin,
An emulsion or a latent heat storage material 5 in a suspended state in which fats and oils, olefins, etc.) are dispersed is used.

[0006]

[Operation] According to the present invention, by adopting the above-mentioned configuration, it is possible to sequentially introduce the carrier medium from the pipe into the heat exchanger by switching the electromagnetic valve, from the bottom to the top or from the top to the bottom. It is possible to supply heat to the latent heat storage material, and it functions so that the temperature inside the heat storage tank becomes uniform without stirring.

[0007]

EXAMPLES The operating conditions of this heat storage tank will be described below with reference to the drawings.

FIG. 1 shows a heat storage tank 1 of the present invention. Heat storage tank 1
The heat exchanger 2 in the inside consists of several sets of plate type arranged in the vertical direction, and the refrigerant sent from the pipe 4 flows inside.

An electromagnetic valve 3 is attached between each heat exchanger 2 and the pipe 4. At the start of cold storage, only the electromagnetic valve 3 of the bottommost heat exchanger 2 is opened, and the bottommost portion forms temperature stratification to store cold.

Next, only the electromagnetic valve 3 of the heat exchanger 2 of the upper stage is opened to store the cold in this portion.

Thus, by utilizing the temperature stratification that occurs due to the large temperature gradient of the latent heat storage material 5, the cold storage portion is gradually increased from the lower portion to the upper portion to store all the latent heat storage material 5 in the heat storage layer 1.

When the temperature is raised, the uppermost heat exchanger 2 is set.
By reusing the heat from the portion corresponding to, it is possible to re-store heat in the same manner.

In addition, as the shape of the heat exchanger, a fin tube or the like may be used from the viewpoint of promoting heat transfer coefficient.

[0014]

EFFECTS OF THE INVENTION According to the present invention, with the above-mentioned structure, compared with the prior art, the power required for stirring is not required, and heat can be stored in the latent heat storage material with a simple structure.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a heat storage tank of the present invention.

FIG. 2 is a schematic sectional view showing a conventional heat storage tank.

[Explanation of symbols]

1 Heat Storage Tank 2 Heat Exchanger 3 Electromagnetic Valve 4 Piping 5 Latent Heat Storage Material (Emulsion or Suspension State) 10 Stirrer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Dono 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 plurality of sets of heat exchangers 2 are vertically arranged inside, and a solenoid valve 3 is provided at a connection portion of each heat exchanger 2 with a pipe 4.
As a carrier medium to be attached to and injected into a continuous phase (ethylene glycol aqueous solution, propylene glycol aqueous solution, or just water), a dispersed phase (paraffin, oil, olefin, etc.) having a higher melting point (same as the freezing point) than the continuous phase. ) A heat storage tank characterized by using an emulsion or a latent heat storage material in a suspended state in which a) is dispersed.