HEAT TRANSFER IN NUCLEATE BOILING OF MIXTURES

Abstract

An equation for predicting heat transfer coefficients for nucleate boiling of mixtures is derived. This expression contains only one adjustable parameter and the liquid-phase mass transfer coefficient. If the adjustable parameter is put equal to unity, comparison with the most recent data for the SF/sub 6/-CF/sub 2/-Cl/sub 2/ system gives a mass transfer coefficient of 2 X 10/sup -4/ m/s, which is of the same order of magnitude as the value obtained in physical and chemical absorption and in fallingfilm vaporization. The new equation corresponds particularly well with the experimental observation that the heat transfer coefficient is less dependent on the heat flux density and the pressure for nucleate boiling of mixtures than in the case of the pure components.