JPS60103296A - Thermosiphone of inner descending pipe system - Google Patents

Abstract

PURPOSE:To contrive an increase of a quantity of heat transmission per pipe without heating a return part of a condensed liquid, by making the inside of a descending pipe of the inside of an outer pipe into structure wherein the condensed liquid flows. CONSTITUTION:An outer pipe 1 consists of mainly a heat receiving part 7 and a condensation part 6. As the heat receiving part 7 is heated in the inside of a high heat source, a working fluid 5 in the inside boils, gaseous phase and a liquid phase are separated by a vapor-liquid separator 3 and the major part of the gaseous phase is arrived at the condensation part 6. On the one hand, as heat of the condensation part 6 is radiated in the inside of a low heat source, a gaseous phase ingredient out of the working fluid 5 is condensed here, and heat transmission is made to the low heat source. A liquid phase ingredient separated by the vapor-liquid separator 3 and the liquid phase ingredient condensed by the condensation part 6 are descended within an inner pipe 2 and returned to the heat receiving part 7 through an open end of the lower part of the inner pipe 2. The heat transmission from the high heat source to the low heat source is made in this manner. As the major part of a condensed liquid is descended along the inner pipe 2, spontaneous circulation of the working liquid can be realized as compared with a heat pipe and sufficient supply of the condensed liquid to the heat receiving part is done.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is for heat transport having a structure in which an outer pipe (1), a tJ operating body (5), an inner downcomer pipe (2), and a gas/liquid container (3) are placed inside the outer pipe (1). This relates to an internal downcomer type thermosyphon used for. The usage and operating principle are as follows.

The outer tube (1) mainly serves as a heat receiving section (7).

The gas-liquid separator (3) consisting of the condensing section (6) may be omitted, or the gas-liquid separator may be used for fixing the internal downcomer.

The heat receiving part (7) is placed in a high heat source and heated.

As a result, the internal working fluid (5) boils, becomes a gas-liquid two-phase state, rises, and passes through the gas-liquid separator (3) into a gas phase and a liquid phase.
The majority of the gas phase reaches the condensation section (6). If there is no gas-liquid separator (3), gas-liquid will be naturally separated by mixing near the upper end of the inner tube (2).

On the other hand, the condensing section (6) is placed in a low heat chamber and heat is radiated. Therefore, the vapor phase component of the internal working fluid (5) condenses here and transports heat to a low heat source. The liquid phase component separated in the gas-liquid separator (3) and the liquid phase component condensed in the condensation section (6) descend through the inner tube (2) and are discharged from the lower open end of the inner tube (2). Return to the heat receiving section (7).

In this way, heat is ultimately transferred from the high heat source to the low heat source via the internal downcomer type thermosiphon.

This type of heat transfer tube containing a working fluid for the purpose of heat transfer is called a heat pipe or a closed type thermosyphon. There are cases where something called ζ:L wick is inserted into the heat vibrator without inserting something equivalent to an inner tube, but this is a porous material etc. stuck to the inner wall of the heat transfer tube. , a structure in which the condensate moves through it by capillary action.

Both the heat transport mechanism and the heat transport mechanism are completely different from those of the present invention.

Now, in the conventional Heat Vibe C, the steam generated in the heat receiving section moves through the center of the tube, condenses at the tightening section and transports heat there.The condensed liquid falls naturally along the inner wall of the tube, or , moves within the wick due to the capillary phenomenon and returns to the heat receiving part. Therefore.

ξ゛, where the condensate is heated in the moving part, is in the direction that prevents the condensate from returning to the heat receiving part, and as the heating mold becomes larger, the condensed liquid will eventually dry out on the way back to the heat receiving part, causing heat vibration. reaches the limit of heat transfer performance.

The present invention overcomes this drawback by allowing most of the condensate to descend into the inner tube. In other words, compared to a heat vibrator, natural circulation of the working fluid can be realized due to the presence of the internal downcomer tube, and sufficient condensate is supplied to the heat receiving section. There is no restriction due to heating the return section of the pipe, and the amount of heat transported per pipe can be increased.

In addition, in conventional closed-type thermosibons, the working fluid tends to boil at the bottom of the tube and condense at the top, resulting in bubbles rising inside the fluid.

There is a downward flow of liquid, and there is a performance limit due to a phenomenon called flooding6.In the present invention, the condensed liquid flows in the internal downcomer pipe, and since the wood is free from this limit, The amount of heat transported can be increased.

The present invention overcomes the drawbacks of conventional similar heat exchanger tubes by inserting an internal downcomer tube.

[Brief explanation of drawings]

Figure 1 is a sectional view taken along line A-A of the present invention. Figure 2 is an elevation view. Figure 3 is a perspective view Figure 4 is a diagram of the operating principle. 1 is the outer tube 2 is the internal downcomer pipe 3 is a gas-liquid separator 4 is a support 5 is working fluid 6 is the condensing part 7 is the heat receiving part Figure 1 ■ Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] An inner descending pipe (2) with both ends open is attached to the outer pipe (1) with both ends closed so that the outer pipe (1) does not move with a support (4) etc., and a working fluid (5) is attached to the wall. ) is an internal descending tube type thermosiphon with a structure sealed inside.