Accession Number : AD0454029


Title :   STUDY AND FABRICATION OF A SOLID-REFRIGERATION SUPERINSULATION COOLING SYSTEM.


Descriptive Note : Quarterly progress rept. no. 1, 1 Jul-30 Sep 64,


Corporate Author : AEROJET-GENERAL CORP AZUSA CALIF


Personal Author(s) : Harkee,J


Report Date : 30 Sep 1964


Pagination or Media Count : 15


Abstract : A report is made of the prerequisite research and development required to design and fabricate a superinsulated solid-refrigerant cooling system. Two of seven superinsulation experiments were completed. Two significant performance parameters were identified. These are: Gas conduction at pressures below 2.5 x 10 to the minus 4 mm Hg and number of radiation shields per unit thickness. A graphical method is presented for determining the leakage of heat through supports, as a function of the weight of the loaded inner can. Three methods of heat transfer were selected for study. Copper was found to be the most favorable weight-optimized solid conductor below 40 K; above 40 K, aluminum must be considered. An experimental evaluation of induced-convection heat transfer has been initiated. A micro-fan has been designed to study the energy effects and efficiency of a forced-convection heat-transfer device. Helium was selected as a working fluid. (Author)


Descriptors :   *COOLING AND VENTILATING EQUIPMENT , *THERMAL INSULATION , *CRYOGENIC STORAGE DEVICES , COOLING AND VENTILATING EQUIPMENT , REFRIGERANTS , SCIENTIFIC RESEARCH , HEAT TRANSFER , CALORIMETERS , TEST EQUIPMENT , CRYOGENICS , THERMAL CONDUCTIVITY , MATHEMATICAL ANALYSIS , HELIUM , PERFORMANCE(ENGINEERING) , COPPER , ALUMINUM , CONVECTION


Distribution Statement : APPROVED FOR PUBLIC RELEASE