JPS62276379A - Radiator for heat pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention "Industrial Field 111" The present invention relates to a heat pipe III radiator suitable for use in a heat pipe for freezing the ground or sludge, and in particular, The side wall surrounding the heat dissipation part of the heat pipe is F4j.
The present invention relates to a radiation device comprising a radiation container body having a bottom plate formed with an rY through hole into which the heat radiation part of the heat vibrator is inserted.

``Conventional Technology'' Ground freezing that occurs in cold regions causes frost heaving and other phenomena, causing great damage to buildings and roads. For this reason, research has been conducted to prevent or suppress the freezing of the ground, and at the same time, technological development utilizing such frozen soil has been progressing for some time.

However, when artificial frozen soil is created using electricity,
There are problems such as the high initial cost and running cost.

Therefore, the present applicant has conducted various experiments on the creation of frozen soil using heat pipes, based on the belief that by using heat pipes in addition to the above, initial costs and running costs can be significantly reduced. As a result of conducting research on the possibility of heat pipes, we found that if the temperature during immersion is greater than 400°C-day,
It is possible to build frozen soil in the ground using heat pipes, and in order to store natural cold heat underground for a long time via heat pipes, the form of latent heat is ideal, and for this purpose, the ground is preferable to bedrock. We obtained the knowledge that clay soil, which has a high moisture content, is generally more suitable than sandy soil.

Based on such knowledge, the present applicant has already published Japanese Patent Application No. 60-254504 [Method for improving soft and weakly viscous soil using heat pipes], in which the water absorption force and freezing expansion pressure generated during the freezing process are calculated using 111. Ground improvement method for dewatering soft and viscous ground, or patent application 1985-285
With No. 122 "Low Temperature Storage", we have developed a low temperature storage that actively utilizes frozen soil as a cold source.

FIG. 5 shows an example of the structure of a low temperature storage ITj using a heat pipe proposed by the present applicant in Japanese Patent Application No. 60-285122. This is done by using an excavated hole L opened to the outside air, which is excavated on the surface of the ground G, as a storage location.
The ground G was frozen using the heat pipe 2 buried around the ground, and the inside of the pre-IJ2 excavation hole was cooled.
A heat insulating roof 3 covering the top surface of the drill hole 1 is placed on the ground G around the drill hole I, and a side wall 1a of the drill hole 1 is installed.
The heat pipe 2 is formed on an inclined surface that slopes upward as it approaches the opening of the excavation hole 1, and the heat pipe 2 is extended along the side wall portion 1a of the excavation hole 1 with its lower end reaching the lower floor 1b of the excavation hole I. It was buried so that it would come out.

According to the above configuration, in the winter, supercooled outside air energy can be stored as frozen soil and water in the ground surrounding the excavation type, and in warm spring and summer months, the cold stored thermal energy can be used to cool the inside of the excavation hole. can be kept at a constant low temperature.

"Problems to be Solved by the Invention" The present invention attempts to solve the following problems in the prior art described above.

■The heat pipe 2 used in the conventional ground freezing has a structure that releases the heat in the ground G through the fins 4 on the ground and builds frozen soil F, as shown in Fig. 5. In such a structure using the fins 4, the hot rolling resistance between the fins 4 and the atmosphere is large, and the amount of heat transported by the heat pipe 2 is small.

■Because it is difficult to lower the frozen soil temperature below atmospheric temperature,
It is difficult to construct frozen soil only in some cold regions (for example, the northern half of Hokkaido).

The present invention was proposed in view of the above circumstances, and its purpose and purpose is to increase the heat transport amount of the heat pipe through the radiant effect of the heat dissipation part of the heat pipe, and to lower the frozen ground temperature below atmospheric temperature. It is an object of the present invention to provide a radiation device for a heat vibrator that can be used.

"Means for Solving the Problems" In order to achieve the above-mentioned object, the present invention has a side wall portion surrounding a heat radiating portion of a heat pipe that freezes the ground or sludge, and the heat radiating portion of the heat pipe is inserted into a bottom plate portion. The radiation container body includes a radiation container body in which a through hole is formed, an inner surface of the radiation container main body and an outer surface of the heat radiation part of the heat pipe are each formed as a black body surface, and a reflective material is provided on the outer surface of the radiation container body. It is characterized by

"Function" According to the above configuration, the heat dissipation part of the heat pipe is surrounded by the radiation container main body, and a radiation cooling space is formed around the heat dissipation part, so the heat pipe loses heat amount by radiation and is cooled, and as a result, Cold heat is carried through the heat pipe to the bottom of the heat pipe, forming frozen soil around it.

[Embodiment j] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The example was applied to a heat pipe that creates frozen soil in a low-temperature storage facility. Note that the same components in the figure as in FIG. 5 are given the same reference numerals, and the explanation thereof will be simplified.

In these figures, reference numeral 10 denotes a radiation container body that accommodates the heat radiation part 2a of the heat pipe 2, and this radiation container body 1
0, a side wall portion 11 surrounding the heat radiating portions 2a of a plurality of heat pipes 2 buried around the excavated hole (storage) 1 by a heat insulating rope, and a through hole 12 into which the heat radiating portions 2a are inserted are formed. It is formed in the shape of a bottomed saucer integrally formed with the bottom plate part 13.

As shown in FIG.
b, the upper surface 13a of the bottom plate portion 13, and the outer surface of the heat dissipation portion 2a of the heat pipe 2, each of which has a black body surface 15 on its entire surface. This black body surface 15 exhibits the effect of dispersing radiation in all directions. To form this black body surface 15, a black-colored heat insulating material is pasted on the inner surface of the radiation container body lO and the outer surface of the heat vibrator 2. You can attach it,
Alternatively, black paint may be applied to form a black body surface.

On the other hand, on the outer surface of the radiation container main body 10 (exterior part 11C of the side wall part ti in the embodiment), a reflective material [6] made of a material such as aluminum foil with high reflectivity is provided integrally so as to cover the entire outer surface. It is being

The symbol 2) in the figure is an insulating roof that covers the upper surface of the radiation container main body 10, and the radiation container main body IO
Attached to the top surface, this roof 2
0 is held open.

According to the radiation device having such a structure, the radiation container body 10
In the space surrounded by the black body surface 15, the maximum radiant energy is radiated from the heat radiation part 2a of the heat vibe 2, and the heat radiation part 2a of the heat pipe 2 is cooled. In other words, the heat radiation part 2a of the heat vibrator 2, which has a blackbody surface 15, has an emissivity of l, so if its temperature is T'', then 1
It is cooled by radiating heat of σT4cal per minute per minute (σ is Boltzmann's constant). In particular, in the present invention, the radiation container main body 10 has its outer surface covered with a reflective material 16 and its inner surface covered with a heat vibrator 2. Since it is a black body surface 15 like the heat radiation part 2a, heat from the outside is absorbed by the reflective material 16.
The amount of heat is reflected from the inner surface by heat radiation, and the heat is reflected by the heat radiation part 2a surrounded by the radiation container body 10.
A radiative cooling phenomenon occurs around the radiation container body 10 with almost no influence from the outside, and as a result, the cold energy moves to the lower part through the heat vibrator 2 and builds frozen soil F on the ground.

As described above, in the present invention, the heat radiation from the heat radiation part 2a of the heat vibrator 2 is transferred to the black body surface 1 within the radiation container body 10, instead of the heat transfer by convection of the fin structure as in the conventional structure.
Since this is carried out by radiation from the heat pipe 5, as will be described later, the amount of heat transported by the heat vibe 2 increases, and the temperature at the lower part of the heat pipe 2 can be lowered to below atmospheric temperature, thereby making it possible to construct frozen soil F.

In other words, the heat transport amount Q of the heat vibrator 2 is given by the following formula 〇), and since there is a relationship of R1>R2>R3 between each thermal resistance R1, Rt, and R3, R6 is used as the radiation structure. In the present invention, which is made smaller, the heat transport IQ of the heat vibrator 2 increases.

Q-(Ta-Tg)/(R1+R2+R3)--
(i) However, Ta, Tg: atmospheric and ground temperature, R
1: Thermal resistance between the heat vibrator and the atmosphere, R3: Thermal resistance inside the heat pipe, R3: Thermal resistance between the ground and the heat vibrator.

Next, another embodiment of the present invention will be described with reference to FIG. In this example, it was applied to a sludge treatment facility.

First, let me explain about this sludge treatment facility.
The basic structure is that sludge contained in a concrete box 20 is frozen by a heat vibrator 2, and the box 2
A drain hole 21 for treating dehydrated waste water is formed on the lower surface of the side wall portion 20a of the 0.

In the present invention, a radiation container main body 10 is placed on the upper surface of the box 20 to cover the upper surface, and a heat radiation part 2 of the heat vibrator 2 protrudes onto the inner surface of the radiation container main body IO and the bottom plate part 13.
The main feature is that each of the outer surfaces a is a blackbody surface 15, and a reflective material 16 is provided on the outer surface and the bottom surface.

In a sludge treatment facility with such a structure, heat is radiated from the heat radiation part 2a, which is a black body surface 15, due to the radiation cooling phenomenon.
cooled down. As a result, the cold energy moves downward through the heat vibrator 2, freezes the sludge in the box body 20, and dewaters the sludge.

Furthermore, since FIG. 1 shows another embodiment of the present invention, instead of the box body 20 shown in FIG. The box body 26 for storing sludge is combined with the radiation container main body 10.

According to such a structure, in addition to the effect of the embodiment shown in FIG. It is possible to achieve.

"Effects of the Invention" As explained above, according to the present invention, a through hole is formed in the bottom plate part, which has a side wall part surrounding the heat radiation part of the heat vibrator that freezes the ground or sludge, and into which the heat radiation part of the heat pipe is inserted. The radiation container body is characterized in that the inner surface of the radiation container main body and the outer surface of the heat radiating part of the heat pipe are each formed as a black body surface, and a reflective material is provided on the outer surface of the radiation container main body. , as follows.

It has a great effect.

■The heat radiation from the heat radiating part of the heat pipe is carried out by radiation from the black body surface inside the radiation container body, instead of heat transfer by convection in the fin structure as in the conventional structure. heat transport 51 can be increased;
Lower the temperature at the bottom of the heat vibrator to below atmospheric temperature,
Frozen soil can be built.

■As a result of the above, frozen soil construction using heat pipes can be implemented without being limited to some cold regions, so it can be used for general purposes such as ground improvement methods and low-temperature storage using heat pipes. can.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Fig. 1 is a side cross-sectional view of one embodiment applied to a low temperature storage, Fig. 2 is an enlarged cross-sectional view of the inside of Fig. 1 shown by the dashed line, and Fig. 3 is another embodiment of the present invention applied to a sludge treatment facility. FIG. 4 is a sectional view showing another embodiment of the present invention applied to a sludge treatment facility similar to FIG. 3, and FIG. It is a diagram. G...Ground, F...Frozen soil, 1...
...Drilled hole, la...Side wall part, 1b...
・Bottom floor, 2...Heat pipe, 2a...
... Heat dissipation section, 3 ... Insulation roof, 4 ...
Fin, 10...Radiation container body, 11...
...Side wall part, lla...Top surface of side wall part, llb
...Inner wall surface, 12...Through hole, 13.
...Bottom plate part, 13a...Top surface of bottom plate part, 1
5... Black body surface, 16... Reflective material, 20.
26...Box body, 25...Hot water storage section.

Claims (1)

[Claims] A radiation container body having a side wall portion surrounding a heat radiating portion of a heat pipe that freezes the ground or sludge, and a bottom plate portion having a through hole into which the heat radiating portion of the heat pipe is inserted;
A radiation device for a heat pipe, characterized in that the inner surface of the radiation container body and the outer surface of the heat radiating portion of the heat pipe are all blackbody surfaces, and further, a reflective material is provided on the outer surface of the radiation container body. .