RU20374U1 - HEAT PIPE - Google Patents

Abstract

1. The heat pipe, consisting of located one in another with a gap of the inner and outer tubes, forming a coaxial cavity of the coolant with a Central gas supply channel, characterized in that the coaxial cavity is divided into upper and lower chambers, and the upper chamber is equipped with radial partitions forming sections interconnected in its upper and lower parts and inside of which on the walls of the inner and outer pipes are installed heat flow distributors, and the lower chamber is made with perforation of the inner th and outdoor trub.2. The heat pipe according to claim 1, characterized in that the heat carrier flow distributors are made in the form of truncated cone sectors installed in some sections up from the walls of the inner and outer pipes, and down in other sections.

Description

The utility model relates to heat engineering and can be used to transfer heat flux between environments with different temperatures.

Known heat pipe containing a coaxial cavity and flow distributors (AS USSR No. 443649). The disadvantage of this device is that due to thermal fluctuations of the coolant in it, the separation efficiency of the ascending and descending flows of the coolant outside the distributor is low.

The closest in technical essence to the claimed solution is a heat pipe, consisting of one located in the other with a gap of the inner and outer pipes, forming a coaxial cavity of the coolant and the central gas supply channel (Makarov V.I. Thermosiphons in northern construction. Novosibirsk. " Science, Siberian Branch. 1985.p. 48. Fig. 2.14-a).

The disadvantage of this heat pipe is its low thermal efficiency due to the mixing of the ascending and descending flows of the coolant, as well as the inability to use the heat of vaporous moisture in the semi-permafrost zone of the soil.

The objective of this utility model is to increase the thermal efficiency of the heat pipe in winter.

The present problem is solved in that in a heat pipe, consisting of one and the other, with a gap of the inner and outer tubes, forming a coaxial cavity of the coolant with a central gas supply channel, the coaxial cavity is divided into upper and lower chambers, and the upper chamber is provided with radial partitions forming sections interconnected in its upper and lower parts and inside of which the distributors F 28 D 15/00 are installed on the walls of the inner and outer pipes

2001109309

Heat pipe NISHShShrMrM

heat carrier flow, and the lower chamber is made with perforation of the inner and outer pipes.

The coolant flow distributors are made in the form of sectors of a truncated cone, installed in some sections up from the walls of the inner and outer pipes, and in other sections down.

In FIG. 1 shows a general diagram of a heat pipe

In FIG. 2 section along A - A.

In FIG. 3 shows a view of a distributor.

The heat pipe consists of two outer 1 and inner 2 pipes located one in another, forming a coaxial cavity 3 and a central gas supply channel 4. The coaxial cavity 3 is divided by a partition 5 into two chambers upper 6 and lower 7. The upper chamber 6 is provided with radial partitions 8, forming sections 9, interconnected in its upper and lower parts. Inside sections 9, flow distributors 10 are installed on the wall of the outer pipe 1, and flow distributors I are installed on the wall of the inner pipe 2. Flow distributors 10 and 11 are made in the form of truncated cone sectors and are installed in some sections 9 up from the walls of the inner pipe 2 and the outer pipes 1, and in other sections 9 - down. The lower chamber 7 has perforations 12 in the outer pipe 1 and the inner pipe 2.

The heat pipe is installed in the soil with a frozen layer 13 and a permafrost zone 14.

The operation of the heat pipe is as follows. When the outer pipe 1 is heated by the heat of the soil of the sub-permafrost zone 14, periodic thermal fluctuations occur in the liquid coolant of the upper chamber 6, accompanied by pressure surges, an increase in the velocity of the coolant molecules and a decrease in its density. Thermal fluctuations that occur at the walls of pipes 1 and 2 of sections 9 of the upper chamber 6 og-. nitseny space between the flow distributors 10 and 11. Moreover, in

sections 9 with flow distributors 10 and 11 installed upward from the walls of the inner pipe 2 and the outer pipe 1, the coolant is directed upward of the chamber 6 since the vertical component of the pressure of thermal fluctuations, directed downward, is damped in the corners formed upward by the directed flow distributors 10, 11. Then, from the upper part of the chamber 6, the coolant is sent to sections 9 with flow distributors 10 and 11 installed downward from the walls of the inner pipe 2 and outer pipe 1. In sections 9 with flow distributors 10 and 11 installed down from the walls of the inner 2 and outer 1 pipes, the coolant moves down the chamber 6, while the vertical component of the pressure of thermal fluctuations, directed up, is damped in the corners formed downward by directional flow distributors 10,11.

Bypassing sections with flow distributors 10 and 11 installed downward, the coolant lowers into the lower part of chamber 6 and then again enters sections 9 with flow distributors 10 and 11 installed upward. Thus, sections 9 with flow distributors 10 and 11 installed upward form the channels of the upward flow of liquid coolant, and sections 9 with flow distributors 10 and 11 installed downward form the channels of the downward flow of coolant. The connection sections 9 in the upper and lower parts of the chamber 6 allows you to implement a single circulation system of movement of the coolant with higher thermal efficiency.

In the winter period, when a frozen soil layer 13 is formed, the vapor pressure of moisture in the permafrost zone 14 is higher than the vapor pressure of moisture in the atmosphere. In this regard, the mixture of moisture vapor and gases from the permafrost zone 14 through the perforations 12 in the pipe 1 and 2 rises into the Central gas supply channel 4, on the wall of which heat transfer from the upward gas flow is carried out. The heat transfer effect of the gas is intensified by the condensation of the moisture vapor contained in it on the inner surface of the central gas supply channel 4 in the zone of the coaxial cavity 3 adjacent to the frozen layer 13. In this case, moisture condensate flows under the action of gravity along the inner surface of the central gas supply channel 4 and through the lower rows perforation 12 is returned to the permafrost zone. A gas stream with reduced moisture content from the inner pipe 2 is released into the atmosphere.

Thus, the increase in the thermal efficiency of the heat pipe is achieved due to the above-mentioned features of the installation of the heat-carrier flow distributors in the upper chamber of the coaxial cavity and the condensation of ground moisture vapor in the central channel of the heat pipe.

Khvoinsky L.A. , g - b tenev S.V. Goryaev V.E.

Claims (2)

1. The heat pipe, consisting of located one in another with a gap of the inner and outer tubes, forming a coaxial cavity of the coolant with a Central gas supply channel, characterized in that the coaxial cavity is divided into upper and lower chambers, and the upper chamber is equipped with radial partitions forming sections interconnected in its upper and lower parts and inside of which on the walls of the inner and outer pipes are installed heat flow distributors, and the lower chamber is made with perforation of the inner d and outer tubes. 2. The heat pipe according to claim 1, characterized in that the heat carrier flow distributors are made in the form of truncated cone sectors installed in some sections up from the walls of the inner and outer pipes, and in other sections down.