GRAVITY-ASSISTED HEAT PIPE Russian patent published in 2009 - IPC F28D15/02 

FIELD: heating systems.

SUBSTANCE: this heat pipe is intended mainly for freezing of soil. Pipe includes tight housing filled up with heat carrier and having evaporation and condensation zones, and transport zone, as well as thermoelectric elements, cold surfaces of which have thermal contact to external surface of housing wall in condensation zone, and hot surfaces - to heaters. Peculiar feature of pipe is that housing is provided with external surface of wall having rectangular shape (60) in cross section in condensation zone at the internal cross section in that zone, which does not change as to housing length. Thermoelectric converters (6) are installed on all four sides of external surface of housing wall, and heaters are made in the form of finned plates (8) so that they form cavity (9) enclosing the housing, and free internal volume of the above cavity is filled with low heat-conducting material with low saturation coefficient.

EFFECT: increasing heat transfer ability of heat pipe.