Nucleate pool boiling of high dielectric fluids from enhanced surfaces
Lepere, Victor Joseph Jr.
Marto, Paul J.
MetadataShow full item record
Experimental results of the heat transfer performance of three enhanced heat transfer surfaces, a Union Carbide, Linde High Flux, a Hitachi Thermoexecl-E, a Wieland Gewa-T, and a plain copper surface in the nucleate boiling regime in R-113 and FC-72 are presented. Prior to obtaining the data, each of the surfaces was subjected to one of three initial conditions, and the effect of past history on boiling incipience was observed. The data showed that all the surfaces behaved in a similar manner prior to the onset of boiling. Temperature overshoots were most pronounced for the initial condition in which the surfaces were submerged in the liquid pool overnight. All of the enhanced surfaces exhibited a two to tenfold increase in the heat transfer coefficient when compared to the plain surface. The high flux surface was most effective over a broad range of heat fluxes. The Hitachi surface showed a similar gain in heat transfer coefficient to that of the High Flux surface below 10 kW/m2, while the Gewa-T surface was not as effective as the other surfaces at low heat fluxes. At high fluxes, the Gewa-T surface performed in a comparable if not better manner.
Approved for public release, distribution is unlimited
Showing items related by title, author, creator and subject.
An experimental investigation of surface effects on nucleate pool boiling of liquid nitrogen from a horizontal surface George, Harold Wayne (Monterey, California. U.S. Naval Postgraduate School, 1967-06);The effect of various surface conditions on the characteristic boiling curve for liquid nitrogen was experimentally investigated. A circular horizontal flat plate five square centimeters in area was utilized as a boiler ...
An experimental study of nucleate pool boiling heat transfer from a Gewa-T finned surface in Freon-113 Hernandez, Bonifacio G. Jr. (1982-12);A variety of experimental tests were made with a Gewa-T finned surface in Freon-113 to assist in understanding the physical mechanisms which occur during nucleate pool boiling from this type of surface. The influence of ...
Karasabun, Mustafa (1984-12);In order to study the nucleate pool-boiling performance of R-114 and R-114-oil mixtures from enhanced evaporator tube surfaces, an experimental apparatus was designed, constructed and instrumented. The evaporator was ...