Accession Number : AD0627170

Title :   MATERIALS RESEARCH FOR HEAT TRANSFER FLUIDS.

Descriptive Note : Rept. for Feb 64-Mar 65,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Mecklenberg,Karl R.

Report Date : DEC 1965

Pagination or Media Count : 45

Abstract : Liquid metals have certain properties that make them candidates for heat transfer use in aerospace systems. The objective of the investigation was to determine the magnitude of the heat transfer coefficient of condensation for sodium. The supplementary work with the larger, Type 347 stainless steel boilers is presented, including the description of the boilers and operating procedure. The heat transfer experiments were conducted in a closed boiler system, in which the sodium was boiled in the lower region and condensed upon an instrumented surface in the upper region. The results of the operation are presented, showing the heat transfer coefficient for condensing sodium to be between 65.9 and 951.6 Bty/hr-sq ft-degrees F for the conditions studied. These heat transfer coefficients are lower than predicted and there is no apparent correlation in the data. The large data scatter and low coefficient values were attributed to the random formation of condensate (in which case condensation may occur on only a portion of the total condensing area) and the larger resistivity to heat transfer through the additional condensate layer. (Author)

Descriptors :   (*LIQUID METAL COOLANTS, SODIUM), (*SODIUM, HEAT TRANSFER COEFFICIENTS), CONDENSATION, COOLANTS, BOILERS, AEROSPACE CRAFT, STAINLESS STEEL, HEAT TRANSFER

Subject Categories : Miscellaneous Materials
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE