JPH055374Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is a device for storing cold heat for cooling, etc. in the form of latent heat. The present invention relates to an ice heat storage facility including an ice making machine that supplies ice to a heat storage tank, and a heat exchanger for heat storage and cold extraction that exchanges heat between the heat storage refrigerant and a heat transport fluid on the cold heat consumption side.

[Conventional technology]

Conventionally, in this type of ice heat storage equipment, as shown in FIG.
Finally, the heat storage refrigerant and cold heat refrigerant taken out from the heat storage tank 1 in the circulation path 12 and the heat transport fluid (generally water is used) on the cold heat consuming side are heat exchanged in the heat exchanger 5, and the heat storage cold heat is generated. It was configured to take out the

[Problem that the invention attempts to solve]

However, when using the conventional equipment, in order to efficiently exchange heat between the heat storage refrigerant and the heat transfer fluid in the heat exchanger, the heat storage refrigerant must be forcibly circulated in the circulation path. Therefore, it is necessary to provide a pump P for refrigerant circulation as shown in the figure. Moreover, in order to maintain the heat storage refrigerant at a low temperature using the latent heat storage and efficiently take out the heat storage refrigerant when the stored cold heat is consumed, the ice stored in the heat storage tank must be efficiently melted. To do this, the heat storage refrigerant returned from the heat exchanger is sprayed over the entire top surface of the ice storage using a nozzle N, or the heat storage refrigerant in the heat storage tank is stirred, so that the ice storage and the heat storage refrigerant are mixed. Conventionally, it is necessary to improve the heat transfer performance between the two, and as a result, a sparging device and a stirring device are required.

Therefore, when using conventional equipment, in order to improve thermal efficiency, it is necessary to install ancillary equipment such as a circulation pump, spraying device, stirring device, etc., which leads to increased costs and also reduces workability in terms of maintenance. There were some flaws that were said to be bad.

An object of the present invention is to enable efficient extraction of stored heat and cold, which is advantageous in terms of cost and maintenance.

[Means for solving problems]

A feature of the ice heat storage equipment according to the present invention is that the heat exchanger is disposed within the heat storage tank in such a manner that the heat transfer fluid flows from the top to the bottom of the heat exchanger. The functions and effects thereof are as follows.

[Effect]

Since the heat exchanger is placed inside the heat storage tank, there is no need for piping or ancillary equipment such as pumps to supply heat storage refrigerant to the heat exchanger, and the heat storage tank and heat exchanger can be connected in a well-organized manner. It can be made into something. Moreover, the heat exchanger is installed in such a manner that the heat transport fluid flows from the top to the bottom, and the ice stored in the heat storage tank floats in the heat storage refrigerant and exists in the upper layer. Therefore, the high temperature return heat transfer fluid from the cold heat consumption section first exchanges heat with the ice storage or the cold heat storage refrigerant mixed with the ice storage. As a result, heat exchange between the heat storage refrigerant containing ice or ice storage and the heat transfer fluid occurs naturally and efficiently, and the heat transfer fluid is cooled and the ice storage is efficiently melted.

[Effect of idea]

Therefore, the present invention has made it possible to provide an ice heat storage facility that is advantageous in terms of cost and maintenance while efficiently extracting stored cold heat, and is also superior in workability.

〔Example〕

Next, an example of the present invention will be shown.

This is an ice heat storage facility used as a source of cold heat for air conditioning, etc. As shown in FIG. The water in the brine taken out from the heat storage tank 1 is frozen and turned into solid-liquid mixed phase sherbet-like brine.
An ice maker 3 is provided to supply ice to the ice maker 3.
By circulating brine between the ice maker 3 and the heat storage tank 1 while the ice maker 3 is in operation, the heat storage tank 1
It is configured to cool the stored brine inside in the form of a solid-liquid mixed phase shearbet and store cold heat in the form of latent heat.

In addition, the ice heat storage equipment is a cold heat consuming unit 4 such as an air conditioner.
A heat exchanger 5 is provided for exchanging heat between the brine and water, which is a heat transfer fluid that conveys cold heat, so that the stored cold heat can be taken out to the cold heat consuming part 4.

A net 6 is provided near the bottom of the heat storage tank 1 to prevent stored ice particles from entering the bottom side.

The brine outlet 2a from the heat storage tank 1 in the circulation path 2 is located below the net 6, and the reflux part to the heat storage tank 1 is located slightly above the net 6. , it is constructed with a perforated pipe 7 in which a large number of ejection ports are distributed and formed.

The heat exchanger 5 is arranged in a portion of the heat storage tank 1 above the perforated tubes 7, in a state in which ice is evenly distributed over the entire upper portion, and in which ice is distributed from the top to the bottom. It is arranged in an attitude that allows it to flow in the direction of the object. Specifically, the upper return header 5A connected to the return path 8 from the cold heat consumption part 4
and a lower outgoing header 5B connected to the supply path 9 to the cold heat consumption section 4 are connected by a plurality of heat exchange tubes 5C, and the heat exchange tubes 5C may be either with fins or without fins.

10 is a pump for brine circulation, and 11 is a pump for water circulation.

According to the above configuration, the high-temperature return water that has flowed into the heat exchanger 5 from the cold energy consumption unit 4 via the return path 8 contains a large number of ice particles among the brine in the heat storage tank 1. Heat exchange occurs with the brine in the upper layer, and as a result, heat exchange between the return water and the brine is performed efficiently, and the return water is efficiently cooled, while ice particles are efficiently melted. As the ice particles in the upper layer melt, the ice particles in the lower layer float up due to their buoyancy, and as a result, as long as there are ice particles in the heat storage tank 1, the ice particles will remain permanently in the upper layer. As a result, the above-described efficient heat exchange action in the upper layer is maintained until all of the ice particles in the heat storage tank 1 are melted.

[Another example]

Another embodiment of the present invention will be shown below.

[1] In the above embodiment, the ice making machine 3 is one that supplies ice in the form of a solid-liquid mixed-phase sherbet, but the ice making machine 3 may be one that supplies only ice.

[2] In the above embodiment, the heat exchangers 5 are arranged almost uniformly throughout the heat storage tank 1, but the heat exchangers 5 may be immersed only in the upper layer of the brine, It may be located at a local location within the tank 1. In other words, the heat exchanger 5 may be one that causes the heat transfer fluid to flow from the top to the bottom, and its structure, shape, and size can be changed as appropriate.

[3] In the above embodiment, there is one heat exchanger 5, but there may be a plurality of heat exchangers 5.

[4] Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a schematic cross-sectional front view, and FIG. 2 is a schematic cross-sectional side view. FIG. 3 is a schematic sectional view showing a conventional example. 1... Heat storage tank, 3... Ice maker, 5... Heat exchanger.

Claims (1)

[Scope of utility model registration request] A heat storage tank 1 that stores a heat storage refrigerant, an ice maker 3 that supplies ice to the heat storage tank 1, and a heat exchanger for heat storage and cold extraction that exchanges heat between the heat storage refrigerant and a heat transport fluid on the cold heat consumption side. 5, wherein the heat exchanger 5 is disposed in the heat storage tank 1 in a position that causes the heat transfer fluid to flow from the top to the bottom. Facility.