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RESEARCH PAPERS

Heat Transfer Through Falling Film Evaporation and Boiling on Horizontal Tubes

[+] Author and Article Information
W. H. Parken

Center for Building Technology, National Bureau of Standards, Washington, DC 20234

L. S. Fletcher, J. C. Han

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

V. Sernas

Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, NJ 08855-0909

J. Heat Transfer 112(3), 744-750 (Aug 01, 1990) (7 pages) doi:10.1115/1.2910449 History: Received October 28, 1988; Revised September 18, 1989; Online May 23, 2008

Abstract

Evaporation and boiling heat transfer coefficients are presented for thin, distilled water films flowing over the outside of horizontal, electrically heated brass tubes. Tests were conducted with a thin-slot water distribution system for 2.54- and 5.08-cm-dia smooth tubes. Both local and average heat transfer data were obtained for nonboiling and boiling conditions corresponding to feedwater temperatures ranging from 49 to 127°C and heat-flux values ranging from 30 to 80 kW/m2 . Feed-water flow rates ranged from 0.135 to 0.366 kg/s per meter length per side of the tube. Both nonboiling and boiling correlations of the average heat transfer coefficients were developed and compared.

Copyright © 1990 by The American Society of Mechanical Engineers
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