Theoretical Analysis of Vapor Absorption on a Falling Liquid Film for the Comparison with Vertical In-Tube Absorption

Abstract

The absorption of vapor by LiBr aqueous solution falling on a vertical wall was analyzed numerically with an assumption of a laminar liquid film with a smooth surface. Giving the wall temperature obtained by the experiment for in-tube absorption, the change in the absorption process along the wall was discussed with looking particularly at the effect of solution subcooling at the inlet. Then the experiment was compared with the theoretical analysis with respect to the wall heat flux, the absorption rate and the heat and mass transfer coefficients to elucidate the effect of wavy, non-uniform liquid film flow on the absorption process.