JPS5997492A - Heat transfer device - Google Patents

Abstract

PURPOSE:To enable to alternately transfer heat in vertical directions in a non- powered manner by using the principle of a heat pipe, in relation to a heat transfer device by which heat can be transferred between positions spaced in the vertical direction. CONSTITUTION:A loop form continuous pipe system 1 is elongate in the direction of gravity, and is provided with an ON-OFF valve 2 at an upper part thereof. At a lower part of the pipe system 1, a semipermeable membrane 3 is provided to define the first chamber 4 and the second chamber 5 between it and the valve 2. A solvent 6 is contained in the first chamber 4, while a solution 7 is contained in the second chamber 5. When the valve 2 is opened, heat is transferred into the pipe system 1 at a part proximate to a wick 8 as indicated by Q1, thereby evaporating the solvent of the solution 7. The resultant vapor flows in the pipe system 1 as indicated by F, and is condensed at a part proximate to the surface of the solvent 6 as indicated by Q2, thereby releasing heat. The thus condensed solvent is conveyed into the second chamber 5 through the semipermeable membrane 3 to compensate for the loss of the solution 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat transfer device that can transfer heat between vertically separated positions. cannot be transmitted downward.

On the other hand, the effective use of solar energy is being called for, and there are methods that store the sun's thermal energy underground during the day and extract the underground heat to the ground at night. . 7. Ia, □
2 or 7. . It is thought that the rays accumulate deep in the rays (6□1) and take them out to the ground during the winter.

The accumulation and recovery of solar heat can be performed using water and a pump, but it can be done more efficiently and at lower cost if it can be done without using external power.

An object of the present invention is to provide a heat transfer device that uses the principle of a heat pipe to enable alternate heat transfer in the vertical direction without power.

This will be explained in detail below with reference to the drawings.

The figure is a schematic diagram showing an embodiment of the present invention.

A pipe system 1 continuous in a loop shape is vertically long in the direction of gravity, and an on-off valve 2 is provided at the top. A semipermeable membrane 3 is provided below the pipe system 1, and the semipermeable membrane 3 defines a first chamber 4 and a second chamber 5 between the semipermeable membrane 3 and the on-off valve 2. first chamber 4
A solvent 6 is contained within the chamber 5, and a solution 7 is contained within the second chamber 5. Water is suitable as the solvent, but the solvent is not limited thereto. The solution is salt water (NaCl +
H20) is suitable, but others may be selected as solutes.

The water level H of the solution 7 appropriately represents the concentration of the solution 7, and the semipermeable membrane and 1. This paper describes the case where cellulose acetate is used.

A wick 8 is provided on the inner surface of the pipe system 1 near the water surface of the solution 7.

Since this embodiment describes heat exchange between the underground and the ground, the ground surface 911'j: The solution water level is also at a low level.

The operation of the device of the present invention constructed as described above will be explained below.When heat from the ground is to be transferred to the underground, the on-off valve 2 is opened. Then, the heat is like Ql in the pipe system 1 near wick 8.
The solvent in the solution 7, in this example the water in the brine, evaporates.

The steam flows through the pipe system 1 as shown in F in the figure, condenses near the water level of the solvent 6 as shown in Q2, and radiates heat. The condensed solvent is transported to the semipermeable membrane 3 and 5 to compensate for the decrease in the solution 7. Note that the heat dissipation level 1d can be appropriately selected using a heat insulating material. That is, it is preferable to provide a heat insulating material except for the part Pfr that performs heat radiation and heat absorption.

In the above manner, when the on-off valve 2 is opened, heat can be transferred from above to below.

Next, when the Kid Closing Valve 2 is closed, the operation is as follows: The chamber 4 of the Dimension 1 performs the same function as an independent gravity heat pipe.

That is, heat is given to the solvent, ie water, as P□,
Water turns into steam and moves upwards as shown in the U-shape. and,
Heat is radiated to the outside as shown at P2 above, that is, at the heat radiating position. This heat radiation position can also be arbitrarily selected by using a heat insulating material. As described above, when the on-off valve 2 is closed, heat can be transferred from below to above.

In the above explanation, the operation of the on-off valve 2 is not limited to manual operation.
This can also be done automatically using a timer or the like.

Further, it is also included in the present invention even if a one-way valve is used as the opening valve 2.

This one-way valve may be any valve that allows flow only from the second chamber 5 to the first chamber 4.

Furthermore, by varying the width (W) of the pipe system 1, heat can be transferred in the vertical direction even at positions separated in the lateral direction.

Furthermore, the present invention is not limited to heat transfer between the ground and underground, but may be applicable to all heat transfer devices that transfer heat alternately up and down in the direction of gravity. In addition, the present invention can be implemented as follows.

Referring to FIG. 2, an on-off valve 12 is provided above a loop-shaped pipe 11, and two partition walls 13 and 14 are provided. A solvent is accommodated in the space partitioned by the partition *13 and the on-off valve 12, a solution is accommodated in the space partitioned by the partition wall 14 and the on-off valve 12, and there is a semi-permeable space between the partition wall 13 and the partition wall 14). Hollow fibers 15 made of plastic are provided. The hollow fiber 15 is a pipe-shaped fiber made of a semi-permeable membrane, and its upper end is bent into a U-shape and immersed in the solution, and its lower end penetrates the partition wall 13 and opens into the solvent. It is being To promote evaporation, the inner surface of the tube system containing the solution is
Wick 16 is attached.

In the embodiment shown in FIG. 2 described above, the hollow fibers 15 are simply used for the semipermeable membrane girder of FIG. 1, so the operation is exactly the same. However, since the solvent rises inside the hollow fiber pipe 15 and permeates into the solution, the height ■ in Figure 2 can be freely selected as long as the osmotic pressure is within a range greater than the water pressure. Become something.

Note that the tube 11 may be removed from the portion of height h, but in order to protect the hollow fibers 15, a protective structure is required.

Further, the hollow mechanical fiber 15 in the portion of the cylinder length h does not necessarily have to be made of a semipermeable membrane.

According to the embodiment shown in FIG. 2, a sufficient flatness can be obtained even if the amount of solution (or amount of solvent) is reduced.

Unlike the semipermeable membrane shown in FIG. 1, strong K is not required.

As described above, according to the present invention, a heat transfer device capable of transferring heat in either the vertical direction can be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the invention, and FIG. 2 is a schematic diagram showing another embodiment of the invention. 1: Piping system, 2: On-off valve, 6: Solvent, 7: Hot liquid Fig. 1 Fig. 2 Fig. 2

Claims (1)

[Claims] A first pipe is connected between a pipe system continuous in a loop shape, an on-off valve provided at the upper part of the system to connect and shut off the pipe system, and a shut-off valve provided below the pipe system. A heat transfer device comprising a semipermeable membrane forming a chamber and a second chamber, a solution contained in the first chamber, and a solvent contained in the second chamber.