Accession Number : AD0893616

Title :   Fabrication and Instrumentation of an Experimental Passive Radiative Infrared Detector Cooler for Spacecraft Applications.

Descriptive Note : Technical rept. 15 Oct 70-15 Oct 71,

Corporate Author : PHILCO-FORD CORP PALO ALTO CA WESTERN DEVELOPMENT LABS DIV

Personal Author(s) : Schmidt, Werner F. ; Hillesland, Harold L. ; Zierman, Carl A.

Report Date : OCT 1971

Pagination or Media Count : 72

Abstract : A thermal experimental model of a passive radiative cooler for use on an earth orbiting spacecraft was fabricated, assembled, and tested in a thermal vacuum environment. The design of the cooler was based on the results of a previous thermal analysis and design study performed by Philco-Ford for Wright-Patterson Air Force Base. The cooler was assumed to be used on a spacecraft in a 200 nautical mile altitude earth orbit in the plane of the ecliptic. The objective of the program was to verify the thermal performance of the cooler. Thermal analysis predicted an orbital temperature of 146 R for the radiator of the cooler. The tests produced higher than predicted temperatures for the radiator. Depending on the test conditions, a temperature of 246 R to 200R was achieved for the radiator. The primary reasons for the higher than predicted temperatures were identified as higher than predicted thermal conductances between the simulated spacecraft and the cooler shield and radiator surfaces. (Author)

Descriptors :   (*COOLING, INFRARED DETECTORS), (*RADIATORS(HEATING AND COOLING), INFRARED DETECTORS), CRYOGENICS, HEAT TRANSFER, THERMAL RADIATION, SPACEBORNE, SPACECRAFT, SPACE ENVIRONMENTS, SIMULATION, SIMULATORS, THERMAL ANALYSIS, VACUUM, PASSIVE SYSTEMS, TEMPERATURE CONTROL.

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Infrared Detection and Detectors
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE