Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.
The effects of heat and mass transfer on selectivity and
mass fluxes in falling film evaporation of binary mixture on
vertical surface, in the presence of inerts in gas (air, helium)
and liquid (glycol) phase were investigated. The mathematical
model of the process with different simplifying assumptions
concerning heat and mass transfer was elaborated. In numerical
calculations mass transfer resistances both in gas and liquid
phases were considered. Experimental study was performed for
2-ipropanol-water system in the wide range of concentrations
and temperatures. The comparison shows small effect of
diffusional cross effects on mass transfer and selectivity.