SU1239505A1 - Gravity heat pipe - Google Patents

Description

FIELD OF THE INVENTION The invention relates to heat engineering, namely to heat transfer devices.

The purpose of the invention is to reduce the thermal resistance of a heat pipe by intensifying heat transfer in the vapor zone.

FIG. 1 schematically shows a heat pipe, a longitudinal section; in fig. 2 is a section A-A in FIG. 1; figure 3 - zone evaporates pipe in the process, the fragment.

The gravitational heat pipe contains a cylindrical body 1, partially filled with coolant and having zones 2 and 3 of evaporation and condensation, respectively. In the zone 2 of evaporation along the axis of the housing 1 there is a tubular insert 4 with transverse slots 5, made from two diametrically opposite sides and forming ribs b, in contact with the inner surface of the housing 1. The insert 4 is made of material

with lower thermal conductivity than the material of the housing 1 in the zone of contact with the insert.

The size t of the ribs 6 along the radius and the height of the slots 5 can be chosen in the range of (1.5 - 3.0) D, where E is the tear-off diameter of the steam masses formed when boiling liquid in the slots between the ribs 6.

Heat pipe works as follows. .

When heat is supplied and removed in the respective zones through a pipe, the heat and mass transfer from i- is heated through the pipe; by changing the aggregate state of the coolant. In the evaporation zone 2, in areas of the surface of the housing 1 enclosed between the fins 6 of the insert 4, 20, boiling is carried out in the cramped

conditions - with less overheating. liquids compared to a smooth boiling surface, which causes the intensification of heat transfer.

/ t-A

Liquid

Fi.2

Editor N. Tupitsa

Compiled by A. Lobanov

Tehred: O.Gortvay Proofreader M.Samborska

Order 3384/39. Circulation 589 Subscription

VNIIPI USSR State Committee

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

“Production and printing company, Uzhgorod, Projecto st., 4

Fig.Z

Claims (1)

A GRAVITATIONAL HEAT PIPE containing a body partially filled with coolant and placed in the evaporation zone with a tubular insert with slots for steam passage, characterized in that, in order to reduce the thermal resistance of the pipe by intensifying heat transfer in the evaporation zone, the slots are transverse with the formation of ribs in contact with the inner surface of the housing, and the insert is made of a material with lower thermal conductivity than the material of the housing in the zone of contact with the insert. about »SU.„, 1239505 1 1239 505 ²