Accession Number : AD0622825

Title :   INVESTIGATION OF LIQUID METAL BOILING HEAT TRANSFER.

Descriptive Note : Rept. for May-Aug 65,

Corporate Author : MICHIGAN UNIV ANN ARBOR LIQUID METALS LAB

Personal Author(s) : Balzhiser,Richard E. ; Caswell,Bruce F. ; Padilla,Andrew ,Jr. ; Barry,Robert E. ; Gahman,Robert L.

Report Date : AUG 1965

Pagination or Media Count : 48

Abstract : Critical heat flux determinations with rubidium continued. Burnout results along with other liquid metal burnout data were correlated with a dimensionless relation. A film boiler yielded data over pressure range of 2 - 19mm mercury. The data falls slightly above the predictions of Berenson for potassium film boiling at a pressure of a 0.1 atm. Data obtained for which the surface temperature exceeded the saturation temperature by greater than 700F yielded reasonably consistent results when the flux was calculated by two independent procedures. At lower values of the surface temperature, unusual behavior was encountered which is probably related to transitional effects which began to occur on the wall of the vessel near the boiling plate. A forced circulation apparatus was operated to yield condensing coefficients for sodium over a temperature range of 1240F to 1525F and a range of heat fluxes from 215,000 to 583,000 BTU/(hr.)(Sq. ft.). The condensing coefficient was observed to be essentially constant over these ranges at a value of 10,800 = 3,300 BTU/(hr.)(sq. ft.)(F).

Descriptors :   (*LIQUID METALS, HEAT TRANSFER), (*HEAT TRANSFER, LIQUID METALS), (*HEAT EXCHANGERS, LIQUID METAL COOLANTS), (*LIQUID METAL COOLANTS, HEAT TRANSFER), FILM BOILING, CONDENSATION, PRESSURE, TRANSITION TEMPERATURE, ALKALI METALS, SURFACE PROPERTIES, THERMAL CONDUCTIVITY, CESIUM, RUBIDIUM, SODIUM, POTASSIUM

Distribution Statement : APPROVED FOR PUBLIC RELEASE