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Journal of Enhanced Heat Transfer

Impact factor: 0.562

ISSN Print: 1065-5131
ISSN Online: 1563-5074

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v5.i3.40
pages 191-200

Approximate Analysis for Laminar Film Condensation of Pure Refrigerant on Vertical Finned Surface

Shigeru Koyama
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816-8580, Japan
Jian Yu
Institute of Advanced Material Study, Kyushu University, Kasuga, 816, Japan
T. Matsumoto
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, 816, Japan

ABSTRACT

A numerical analysis for the free convective laminar film condensation of pure refrigerant on a vertical finned surface is carried out to clarify basic characteristics of heat transfer in plate-fin condensers. The fin and the liquid film shapes are simplified, and the governing equations of the liquid film and the one-dimensional heat conduction equation in the fin are solved numerically using the finite difference method. Three-dimensional distribution of the fin temperature and the distribution of the liquid film thickness along the vertical direction are obtained. The effects of fin shape parameters on the heat transfer enhancement ratio and the fin efficiency are also examined, and a dimensionless correlation equation for condensation heat transfer is proposed.