Correlation of experimental data on heat and mass exchange in the condensation of vapor of an aqueous ammonia solution. (Obobshchenie opytnykh dannykh po teplo- i massoobmenu pri kondensatsii parov vodnogo rastvora ammiaka)

摘要

A water-ammonia mixture was condensed on the outer surface of an inner tube in a vertical two-tube device. The device was insulated on the outside and had compensation electric heating. Chromel-Copel thermocouples (0.3 mm) at five points along the height of the tube measured the tube wall temperature. The height of the tube measured the tube wall temperature. The thermocouple leads passed through the isothermal surface and the thermocouples in the vapor phase were protected from condensate. The theoretical temperature on the outer surface of the film was determined from Nusselt's film theory. The composition of the liquid corresponding to that temperature was compared with the measured average composition of condensate draining from the tube. The composition of vapor over the liquid was assumed on the basis of conditions of equilibrium.