INVESTIGATION ON HEAT AND MASS TRANSFER OF FALLING FILM ABSORPTION INSIDE A VERTICAL TUBE WITH TFE/NMP AS WORKING FLUID

摘要

This paper describes a theoretical analysis of heat and mass transfer of falling film absorption inside a vertical tube using 2,2,2-Trifluoroethanol/N-Methylpyrolidone(TFE/NMP) as working fluid under laminar flow. In the physical model and governing equations presented in the paper, the variation of falling film thickness and the effects of the radial convective term on heat and mass transfer, heat and mass fluxes at interface between liquid and gas are considered. The governing equations with related boundary conditions are solved by suitable numerical finite difference method and then the distributions of solution temperature and concentration and heat and mass fluxes at the interface are obtained. Further more, some relevant conclusions are given by analyzing calculation results.