SU1464028A1 - Heat pipe - Google Patents

Abstract

The invention makes it possible to increase the heat transfer capacity of a heat pipe by increasing the limiting heat fluxes. The heat pipe includes a housing 1 with zones 2,3 and 4 of evaporation, condensation and transport, respectively, and a wick 5 on the inner surface, under which longitudinal grooves and transverse grooves 7 are filled with thermal insulation material, over which the wick 5 is made increased thickness. When the pipe is running in the wick 5, in its sections that are in contact with the heat insulating material, arteries occur, which cause low hydraulic resistance. 2 Il.

Description

The invention relates to heat engineering, namely to heat transfer devices.

The purpose of the invention is to increase the heat transfer capacity by increasing. limiting heat fluxes.

Figure 1 schematically shows a heat pipe, a longitudinal section; Figure 2 - evaporation zone, cross section.

The heat pipe contains a sealed housing 1 with zones 2-4 of evaporation, condensation and transport, respectively, and a capillary-porous wick 5 on its inner surface. In the evaporation zone 2, longitudinal and transverse grooves 6 and 7, respectively, made flush with the heat-insulating material 8, with the formation of protrusions 9, are made on the inner surface of the housing 1 under the wick And. The wick 5 is made with a variable thickness, increased in the areas of placement of the insulating material 8 and with then in these sections; not less than in the sections: bumps 9. The distance between the transverse grooves 7 increases in the direction of the condensation zone 3, which ensures a corresponding increase in the area of the bumps 9 .

The heat pipe works as follows.

When heat is supplied and removed in the corresponding zones through the pipe, heat and mass transfer are carried out with the aggregate state of the coolant changing, while the heat flux passing through sections of the heat-insulating material 8 is very small, because of this, the temperature limits on the thickness of the wick 5 by thermal resistance disappear and this thickness can be chosen large enough, which in combination with a sufficiently large pore size ensures the creation of arteries in these sections with a small hydraulic resistance Niemi. The heat flux is supplied to the thin sections of the wick 5 located on the protrusions 9. A decrease in the area of these protrusions towards the end of the evaporation zone 2 helps to reduce the risk of drying this part of the evaporation zone 2 at high heat fluxes.

Claims (1)

Claim A heat pipe containing a sealed housing with evaporation and condensation zones and a capillary-porous wick on its inner surface, and longitudinal grooves are made in the wall of the housing in the evaporation zone, filled flush with the heat-insulating material, which means that, in order to increase the heat transfer abilities by increasing the limiting heat fluxes, on the inner surface of the housing in the evaporation zone additionally made transverse grooves filled flush with the insulating material, longitudinal The grooves are also located on the inner surface of the body, the wick is made with a variable thickness, increased in the areas of placement of the insulating material and with a pore size in the zone of the latter not less than in areas of reduced thickness, and the distances between the transverse grooves are made by variables increasing in the direction of the · zone condensation. Compiled by A. Lobanov