Accession Number : AD0606826

Title :   INVESTIGATION OF LIQUID METAL BOILING HEAT TRANSFER.

Descriptive Note : Quarterly progress rept. no. 5, 15 May-15 Sep 64,

Corporate Author : MICHIGAN UNIV ANN ARBOR COLL OF ENGINEERING

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

Report Date : SEP 1964

Pagination or Media Count : 64

Abstract : A numerical analysis of the edge effects in the 1 in. diameter film boiling apparatus was completed. The uncertainty in condensing coefficients for sodium beneath the plate makes it difficult to correct for the large amount of heat which flows up the wall when the system operates in the film regime. A design for a modified boiler is presented. The forced convection apparatus was reassembled after the zirconium chips in the hot trap were replaced. Filters were added at several points in the system to collect suspended solids or oxide if either existed in the system. Despite all efforts plugs still developed and flow was obtained for only brief periods during this time. The extremely small pumping restriction seems to accentuate the problem and consideration is being given to purchasing a new pump which might permit circulation for a period sufficiently long to collect all solids in the loop filters. The agravic apparatus was operated with mercury at a/g of one. Data was obtained in the nucleate, transition and film regimes. (Author)

Descriptors :   (*HEAT EXCHANGERS, LIQUID METAL COOLANTS), (*LIQUID METAL COOLANTS, HEAT TRANSFER), FILM BOILING, RUBIDIUM, SODIUM, ZIRCONIUM, LIQUID METAL PUMPS, NUCLEATE BOILING, TRANSITION TEMPERATURE, WEIGHTLESSNESS

Distribution Statement : APPROVED FOR PUBLIC RELEASE