RESEARCH PAPERS: Boiling and Nucleation

EHD-Enhanced Boiling Coefficients and Visualization of R-134a Over Enhanced Tubes

[+] Author and Article Information
K. Cheung

Naval Center for Space Technology, Naval Research Laboratory, Washington, DC

M. M. Ohadi, S. Dessiatoun

Heat Transfer Enhancement Laboratory, Center for Environmental Energy Engineering, Department of Mechanical Engineering, University of Maryland, College Park, MD 20742

A. Singh

Advanced Development Center, Copeland Corporation, Sidney, OH

J. Heat Transfer 119(2), 332-338 (May 01, 1997) (7 pages) doi:10.1115/1.2824228 History: Received May 20, 1996; Revised September 30, 1996; Online December 05, 2007


In an earlier study by the authors, the applicability of the EHD technique for augmentation of pool boiling heat transfer of R-134a in a tube bundle was demonstrated. This paper reports additional experiments involving optimization of the electrode/heat transfer surface geometry as well as flow visualization studies that provide improved understanding of the EHD-enhanced pool boiling heat transfer in a tube bundle. Utilizing the flow visualization studies, it is demonstrated that combined electroconvection and improved nucleate boiling dynamics give rise to the augmented heat transfer coefficients.

Copyright © 1997 by The American Society of Mechanical Engineers
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