Theoretical Analysis of a Horizontal Condenser-Evaporator Elliptical Tube

[+] Author and Article Information
D. Moalem

School of Engineering, Dept. of Flow Mechanics & Heat Transfer, Tel-Aviv University, Israel

S. Sideman

Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, Israel

J. Heat Transfer 97(3), 352-359 (Aug 01, 1975) (8 pages) doi:10.1115/1.3450378 History: Received February 04, 1975; Online August 11, 2010


The characteristics of the various parameters affecting the films and overall heat transfer coefficients of horizontal evaporator-condenser elliptical tubes are presented for a representative range of operating conditions. Effects of the axis ratio of the tube are analyzed and compared with the equivalent circular tube. The study indicates that the ratio of the vertical to the horizontal axis of about 4 approaches the asymptotic solution for a vertical plane of constant wall temperature and the average overall transfer rate decreases at axis ratios above 4. Effects of the intermittent removal of the condensate film from the wall are presented. The effect of homogeneously distributed noncondensables is accounted for.

Copyright © 1975 by ASME
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