MASS EXCHANGE IN CONDENSERS WITH HORIZONTAL TUBES WHEN THE STEAM CONTAINS AIR

Abstract

A series of tests was made on the condensation of steam in the presence of air in condensers with horizontal tubes. The equipment and techniques used are described. The pressure of the steam --air mixture was varied from 0.047 to 0.91 atm. The results are given and discussed in detail. It was concluded that the mass transfer coefficient during condensation depends on the air content of the mixture and on the Reynolds and Prandtl numbers. With increasing gas content, the coefficient rises rapldly and approaches infinity as the conditions for condensation of pure steam are approached. (TCO-J.S.R.)