SU1255851A1 - Heat tube - Google Patents

Description

The invention relates to heat engineering and can be used in heat pipes.

The purpose of the invention is to ensure the thermodynamic efficiency with non-condensable gas in the pipe.

Figure 1 presents the proposed heat pipe, General view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1.

The heat pipe comprises a housing consisting of two shells and 2 different cross sections introduced in condensation zones 3 and transport 4 one into the other, and the shell 1 with a smaller cross section in the region of the input to the other shell 2 is perforated. The shells I and 2 in this area are interconnected with the formation of cavities 5 and capillary channels 6 and the said cavities 5 are interconnected. In this case, the condition d d cc D is the effective diameter of the capillary channel at a distance d from the interface of the shells, d is the effective diameter of the perforation channels, d is the effective pore diameter of the capillary structure 7 located on the inner surface of the shell 1.

Heat pipe works as follows.

The coolant evaporates in the evaporation zone and in the form of steam enters the condensation zone 3, where steam condenses both on the inner surface of shell 2 and on the outer and inner surfaces of shell G, which due to the low thermal resistance in the zone of conjugation - ki 1 and 2, the temperature close to the temperature of the shell 2. The heat carrier condensed on the inner surface of the shell 2 is drawn into the narrowing capillary channels 6,

Yes, through perforation channels located at the interface of the shells 1 and 2,. drawn into the capillary structure 7 and returned through it to the evaporation zone. The heat carrier condensed on the outer surface of the shell 1 is drawn into the capillary structure 7 through perforation channels located at a distance greater than d | from the boundary of the interface. If a non-condensing gas is present in the heat pipe, the latter is distilled off by the flow of steam in cavity 5. Since cavities 5 in condensation zone 3 are suitable for small bore sections, the gas is practically not spread over the condensation surface, and is condensed into portions of cavities located in area of zone 4 transport.

The shape and design of the shells 1 and 2 can be very diverse depending on the conditions of the heat sink and on the technological requirements and capabilities. For example, a larger cross-section shell may be cylindrical and come into contact with the outer I surface of a smaller cross-section shell, either by eccentric displacement, or by squeezing over the parts of the spine, or by extruding or squeezing a single or multiple spiral groove, etc.

Reliable thermal contact can be provided by resistance welding as well as by press or hot fit.

Thus, by increasing the surface of the condensation zone, the thawing of the non-condensing gas in the cavity 5 outside the condensation zone 3 is reduced, but the thermal resistance of the condensation zone 3 and the heat pipe as a whole.

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fig.Z

Editor N. Bobkova

Compiled by C, Bugorsk Tehred L. Serdyukova

Order 4809/40 Circulation 589 Subscription

VNYIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Project 4 st.

Corrector T, Kolb

Claims (1)

A HEAT PIPE containing a housing consisting of two different shells: cross-section> introduced in the condensation zones and the port transt one into another, and the shell with a smaller cross-section at the insertion section into the other is perforated, characterized in that, in order to increase the thermodynamic efficiency in the presence of a non-condensable g ^ in the pipe, the shells at the site of their entry into each other are interconnected with the formation of cavities and capillary channels, and these cavities are interconnected. bj sp sl 00 sl 1 1255851 2