JPS6262190A - Heat accumulating tank - Google Patents

Abstract

PURPOSE:To obtain a heat accumulating tank for low-temperature heat energy, high in room cooling efficiency, by a method wherein a circulating path, preventing the mixing of high-temperature liquid and low-temperature liquid, is formed and a freezing pipe is provided at the outside of a tank in the vicinity of the tank. CONSTITUTION:A water non-permeating bag of a rubber series material or the like or a tank 2 of concrete or copper is buried into ground and an outer pipe 3, communicating with the upper part of the tank 2, is provided uprightly in the tank. An inner pipe 4, constituted of a dual tube pinching a heat insulating material, is provided vertically in the outer pipe 3 so as to have a gap between the inner pipe 4 and the outer pipe 3 while the inner pipe 4 is mounted so that the lower end thereof is located in the lower part of the tank 2. Heat energy for freezing, having a temperature for freezing groundwater or mud in the ground, is supplied into a freezing pipe 9 neighboring to the outside of the tank 2 whereby the groundwater or the mud in the ground, which is existing at the outer periphery of the tank 2, is frozen to form frozen mud 10. Low-temperature energy, possessed by the frozen mud, is utilized for room cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention particularly relates to a heat storage tank used in a large-scale cooling device installed in a building or the like.

(Prior Art) As shown in FIGS. 3 and 4, a conventional heat storage tank (a) installed in the basement of a building has partition walls ( c) Partitioned by (c), thereby forming the first chamber (di), second chamber (dl), and third chamber (
d3).

(Problem to be solved by the invention) A conventional heat storage tank (a) is connected to a heat exchanger (e) through a pipe, and the thermal energy stored in the liquid in the heat storage tank (a) is used for cooling. Let's consider the case. The pump (f) sends the low-temperature liquid in the third chamber (d3) through the pipe to the heat exchanger (e), and the heat exchanger (e) releases the low-temperature thermal energy possessed by performs heat exchange to absorb the high-temperature thermal energy possessed by the Then, the liquid that has changed from low temperature to high temperature is returned to the first chamber (old) of the p storage tank (a).

The liquid returned to the first chamber (di) by the pump (f) is
It is refluxed by meandering sequentially to the second chamber (dl) and then to the third chamber (d3). During the reflux, the high-temperature liquid that has undergone heat exchange moves to the upper part of the heat storage tank (a), and the low-temperature liquid that has not undergone heat exchange moves to the lower part of the heat storage tank (a). 1st chamber (dl), 2nd chamber (dl), 3rd chamber d
3) is stirred in each chamber. As a result, the temperature of the liquid flowing into the heat exchanger (e) of the cooling device increases, resulting in a disadvantage that the cooling efficiency deteriorates.

Furthermore, since the heat storage tank (a) is relatively close to the ground surface, the upper part of the liquid in the tank is easily affected by the outside temperature, which has the disadvantage that the heat storage tank (a) is heated and it is difficult to store low-temperature thermal energy.

Furthermore, the capacity of the conventional heat storage tank (a) is determined based on the operating time of the air conditioner in a day, so it is large, and the work of manufacturing the heat storage tank (a) or burying it underground is very time consuming. Ta.

In order to solve this problem, the present invention prevents the high-temperature liquid that has undergone heat exchange and the low-temperature liquid that has not undergone heat exchange from stirring even when the liquid in the heat storage tank is circulated, and also The purpose is to provide a small-sized heat storage tank that is not affected by

(Means for Solving the Problem) In order to achieve this object, the present invention includes an outer pipe that is erected at the top of a tank buried underground so as to communicate with the inside of the tank, and an inner pipe that has heat insulating properties that is connected with a gap between the inner pipe and the tank. The freezing tube is inserted into the outer tube, the lower end of the inner tube is placed vertically at the bottom of the tank, and the freezing tube is placed close to the outside of the tank.

(Function) In the present invention, the low-temperature liquid in the lower part of the tank is sucked in through the inner pipe, and the high-temperature liquid that has undergone heat exchange is returned to the upper part of the tank through the outer pipe installed above the tank. The high temperature and low temperature liquids do not stir when moving from the top to the bottom of the screen. Furthermore, since the freezing pipe that transfers the freezing thermal energy is installed close to the outside of the tank, the frozen soil that forms around the tank cools the high-temperature liquid that has been refluxed to the top of the tank, allowing it to be used again in the cooling system. Can be used as a liquid.

(Example) A first example of the present invention in which a heat storage tank is connected to a cooling device will be described with reference to FIG.

A relatively vertical tank (2) made of a water-impermeable bag made of rubber-based material, concrete, or copper is buried underground and formed, and an outer pipe is placed above the tank (2) to communicate with the inside of the tank. (3) is installed upright and installed to prevent liquid leakage.

Then, an inner tube (4) consisting of a double tube sandwiching a heating material is installed vertically within the outer tube (3) with a gap between it and the outer tube (3). The lower end of the inner pipe (4) is connected to the tank (
A tank (2) with such a configuration is buried deeper than the basement of a building, and a frozen tank with excellent heat conductivity is installed outside the tank (2). pipe (9)
A heat storage tank (1) is manufactured by installing a heat storage tank (1) nearby. Then, connect the first vibe (81) from the upper end of the inner pipe (4) protruding to the ground surface to the upper end of the outer pipe (3) protruding to the ground surface, and connect the first vibe (81) from the upper end of the inner pipe (4) to the upper end of the inner pipe (4). Outer tube (3)
Pump (5) and heat exchanger (6) in order in the direction reaching the upper end of
Connect so that there is an intervening

To operate the air conditioner, first, by operating the pump (5), the low temperature liquid stored in the lower part of the tank (2) is sucked up from the lower end of the inner pipe (4) and sent to the first vibe (81). through the pump (5) and the heat exchanger 6
) to reach.

This heat exchanger (6) performs heat exchange in which low-temperature thermal energy contained in the liquid is released and high-temperature thermal energy contained in the air is absorbed. The liquid possessing high-temperature thermal energy, that is, the high-temperature liquid, is transferred from the heat exchanger (6) to the first vibe (
81) and is returned to the upper part of the tank (2).

At this time, a low-temperature liquid flows inside the inner tube (4), and at the same time, an outer tube (3) through which a high-temperature liquid flows outside the inner tube (4).
), the inner tube (4) is made of a double tube with insulation to prevent heat transfer between the cold liquid and the hot liquid.

Then, by supplying freezing thermal energy at a temperature that freezes underground water or underground to the freezing pipe (9) installed near the outside of the tank (2), the outer periphery of the tank (2) is Existing groundwater or above the ground is frozen to form frozen soil (10).

Water-impermeable bags made of rubber, etc., or concrete, ff-,'
Since the manufactured tank (2) is capable of heat transfer, the high temperature liquid returned to the top of the tank (2) exchanges heat with the frozen soil (lO) around the outer periphery of the tank (2), and the high temperature liquid is cooled. and turns into a low-temperature liquid. Then, by moving the low-temperature liquid to the lower part of the tank (2), it can be sucked in again through the inner pipe (4) and refluxed to the heat exchanger (6).

Next, a cooling heat storage tank according to a second embodiment will be explained with reference to FIG.

A relatively vertical tank (2) made of an impermeable bag made of rubber, concrete, or steel is buried underground and formed, and an outer pipe with the same diameter as the tank (21) is placed above the tank (21). (
31), and an inner pipe (41) consisting of a double pipe with a heat insulating material sandwiched in the outer pipe (31) is vertically installed with a gap between it and the outer pipe (31), The inner tube (41) is attached so that the lower end thereof is located at the lower part of the tank (21).

That is, in the first embodiment, the outer tube (3
), but on the second embodiment side, the tank (
21) and the outer tube (31) are integrally manufactured to have the same diameter.

A predetermined number of heat pipes (32) of a predetermined size are erected and fixed to the outer wall of the tank (21) having such a structure. The freezing tube (91), which has excellent heat conductivity, is made to avoid contact with the tank (21) and heat pipe (32) buried deeper than the basement of the building.
91) is installed near the tank (21).

The operation when using such a heat storage tank (11) for cooling is the same as in the first embodiment.

In this case, the freezing thermal energy transferred from the freezing pipe (91) freezes the groundwater around the outer periphery of the tank (21) or above the ground together with the heat vibrator (32) to form frozen soil (lot). When cooling the liquid in the tank (21) with the frozen ground (101), the heat vibrator (32)
21), the thermal energy held by the frozen soil (101) can be used evenly over a wide range. The freezing pipes (9) and (91) installed near the outer periphery of the heat storage tanks (1) and (It) of the first and second embodiments are then connected to underground water or underground water using inexpensive nighttime electricity. By supplying freezing thermal energy to freeze frozen soil (10),
(lot) can be formed.

Since this work can be done at night, it is a good idea to use the low-temperature thermal energy held by this frozen soil for cooling during the day.

(Effects of the Invention) By utilizing the heat storage tank of the present invention in a cooling device, the low temperature liquid at the bottom of the tank containing low temperature thermal energy is sucked in from the lower end of the inner tube, and the heat exchanged high temperature liquid is transferred to the outer tube. Since the flow is refluxed to the upper part of the tank, there is no stirring between the low temperature liquid and the high temperature liquid due to movement of the liquid within the tank.

Therefore, the liquid flowing into the heat exchanger is not a liquid in which low temperature liquid and high temperature liquid are neutralized, but has a large amount of low temperature thermal energy, and has the effect of high cooling efficiency. At night, cheap nighttime electricity is used to supply freezing thermal energy to the freezing pipes, forming frozen soil around the tank's periphery.When the air conditioner is operated during the day, the heat retained by the frozen soil formed the night before is used. By using energy to convert the high-temperature liquid that has been returned to the top of the tank into a low-temperature liquid, the low-temperature liquid can be supplied to the heat exchanger again.

Therefore, there is no need for a large heat storage tank to store liquid necessary for the operating time of the air conditioner in one day, and there is an advantage that a small tank cooling device can be operated.

Furthermore, since a small heat storage tank can be buried deeper than the basement, the low temperature liquid in the heat storage tank is not affected by the outside temperature and will not be warmed up.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a heat storage tank according to an embodiment of the present invention used in a cooling system, Fig. 2 is a diagram showing a heat storage tank according to another embodiment, and Fig. 3 is a diagram showing a conventional heat storage tank used in a cooling system. Figure 4 is a plan view of the heat storage tank (+)... Heat storage tank (2)... Tank (3)... ...Outer pipe (・1) .......Inner pipe (9) ...... Freeze pipe steel diagram 2

Claims (1)

[Claims] An outer pipe is erected at the top of a tank buried underground so as to communicate with the inside of the tank, and an inner pipe with insulation properties is inserted into the outer pipe with a gap, and the inner pipe is 1. A heat storage tank, characterized in that the lower end is vertically located at the bottom of the tank, and a freezing pipe is installed close to the outside of the tank.