Condensation Heat Transfer Rate Research Articles

Film Condensation on Inclined Plane Surfaces

An experimental investigation of the effect of reduced gravity forces on film condensation heat transfer rates was carried out. Reduced gravity conditions parallel to the condensing surface were obtained by condensing saturated steam at atmospheric pressure on one surface of a copper block whose inclination to the vertical could be varied giving effective body forces from 0.1g to 1g in several discrete steps. Condensation heat transfer data were higher than predicted by Nusselt’s correlation. Such increases in heat transfer are shown to be well correlated by an empirical correlation suggested by Kutateladze.

Condensation Heat Transfer of a Binary Liquid Metal Vapor

An experiment was performed in order to provide the necessary data to design condensers for the magnetohydrodynamic generators using binary liquid metal as well as to clarify the characteristics of the binary liquid metal in condensation heat transfer by determining condensation heat transfer rate in forced convection in a pipe with regard to the binary liquid metal with a small quantity of impurities on the basis of radial temperature distribution in vapor. With this end in view, the experiment of the forced convective condensation heat transfer of ternary alloy vapor composed of mercury, bismuth, and lead in a loop was performed, and the measured radial temperature distribution in vapor brought about the following results: the condensation heat transfer rate of the binary liquid metal with small quantity of impurities was found to be nearly equal to that of one component liquid metal; the condensation heat transfer rate of the binary liquid metal with some uncondensed vapor was found to be lower than that without vapor; and to nearly agree with the calculated rate for one component liquid metal vapor. (JA)

Enhancement of Film Condensation Heat Transfer Rates on Vertical Tubes by Vertical Wires

Enhancement of Film Condensation Heat Transfer Rates on Vertical Tubes by Vertical Wires