APPROXIMATE ANALYSIS FOR LAMINAR-FILM CONDENSATION OF PURE REFRIGERANT ON VERTICAL FINNED SURFACE

A numerical analysis for the free convective laminar him condensation of pure refrigerant on a vertical finned surface is carried out to cla rify basic characteristics of heat transfer in plate-fin condensers. T he fin and the liquid film shapes are simplified, and the governing eq uations of the liquid film and the one-dimensional heat conduction equ ation in the fin are solved numerically using the finite difference me thod. Three-dimensional distribution of the fin temperature and the di stribution of the liquid film thickness along the vertical direction a re obtained. The effects of fin shape parameters on the heat transfer enhancement ratio and the fin efficiency are also examined, and a dime nsionless correlation equation for condensation heat transfer is propo sed.