Accession Number : ADD013680

Title :   Ventable Survivable Heat Pipe Vapor Chamber Spacecraft Radiator.

Descriptive Note : Patent, filed 11 Mar 7, patented 17 Nov 87,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Mahefkey, Edward T

Report Date : 17 Nov 1987

Pagination or Media Count : 5

Abstract : A system for radiating heat generated by a source of heat aboard a spacecraft or the like is described which comprises a pair of spaced heat pipes and a pair of spaced wall members having inner condensation surfaces and outer heat radiating surfaces bonded to the heat pipes and defining a vapor chamber, a rewet artery of capillary wicking material disposed within the vapor chamber between the heat pipes and extending substantially lengthwise of the vapor chamber, a source of expendable liquid heat exchange medium operatively connected to the rewet artery for maintaining an inventory of heat exchange medium within the vapor chamber, and a pressure relief valve on the vapor chamber, and a pressure relief valve on the vapor chamber for venting vapor overpressure. The condensation surfaces of the wall members include a multiplicity of capillary grooves extending between the rewet artery and the heat pipes to promote vapor condensation, to facilitate flow of condensate toward the heat pipes, and otherwise to maintain a liquid film inventory near the heat radiating surfaces of the wall members.

Descriptors :   *EXCHANGE, *HEAT PIPES, *HEAT TRANSFER, *PATENTS, *THERMAL RADIATION, CHAMBERS, CONDENSATION, EXTERNAL, FILMS, FLOW, HEAT, INVENTORY, LIQUIDS, OVERPRESSURE, PRESSURE, RELIEF VALVES, SOURCES, SPACECRAFT, SURFACES, VAPORS, VENTING

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Unmanned Spacecraft
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE