Film Condensation of R-113 on In-Line Bundles of Horizontal Finned Tubes

[+] Author and Article Information
H. Honda

Institute of Advanced Material Study, Kyushu University, Kasuga, Fukuoka 816, Japan

B. Uchima, S. Nozu, H. Nakata, E. Torigoe

Department of Mechanical Engineering, Okayama University, Tsushima, Okayama 700, Japan

J. Heat Transfer 113(2), 479-486 (May 01, 1991) (8 pages) doi:10.1115/1.2910586 History: Received October 17, 1989; Revised May 03, 1990; Online May 23, 2008


Film condensation of R-113 on in-line bundles of horizontal finned tubes with vertical vapor downflow was experimentally investigated. Two tubes with flat-sided annular fins and four tubes with three-dimensional fins were tested. The test sections were 3×15 tube bundles with and without two rows of inundation tubes at the top. Heat transfer measurements were carried out on a row-by-row basis. The heat transfer enhancement due to vapor shear was much less for a finned tube bundle than for a smooth tube bundle. The decrease in heat transfer due to condensate inundation was more marked for a three-dimensional fin tube than for a flat-sided fin tube. The predictions of the previous theoretical model for a bundle of flat-sided fin tubes agreed well with the measured data for low vapor velocity and a small to medium condensate inundation rate. Among the six tubes tested, the highest heat transfer performance was provided by the flat-sided fin tube with fin dimensions close to the theoretically determined optimum values.

Copyright © 1991 by The American Society of Mechanical Engineers
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