Waveform, Confinement and Heater Thickness Effects on the Critical Heat Flux from Electrically-Heated Thin Strips

Abstract

Three parameters affecting the critical heat flux from vertical, electrically heated, thin (0.051-0.254 mm) silver strips in R-113 (CC12F-CC1F2) are discussed. The first is the reduction in critical heat flux (up to 32%) with decreasing ribbon thickness due to a lateral thermal conduction effect. The second is a reduced RMS heat flux for an AC sinusoidal waveform. The third is the reduced critical heat flux (up to 40%) from a vertical ribbon when confined between parallel plates, with no apparent dependence on ribbon length.