Prediction of Nucleate Pool Boiling Heat Transfer Coefficients of Refrigerant-Oil Mixtures

[+] Author and Article Information
M. K. Jensen

Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wis. 53201

D. L. Jackman

Water Technologies Division, Aqua-Chem, Inc., Milwaukee, Wis. 53201

J. Heat Transfer 106(1), 184-190 (Feb 01, 1984) (7 pages) doi:10.1115/1.3246632 History: Received October 21, 1982; Online October 20, 2009


This paper describes an experimental investigation to determine the mechanism governing nucleate pool boiling heat transfer in refrigerant-oil mixtures, the role diffusion plays in this process, and the influence of the fluid mixture properties. Boiling heat transfer data were taken in mixtures of up to 10 percent oil by weight in R-113. Thermophysical properties of the mixtures (density, viscosity, surface tension, specific heat, and contact angle) were measured. The decrease in heat transfer coefficient with increasing oil concentration is attributed to diffusion in an oil-enriched region surrounding the growing vapor bubbles. A correlation based on the postulated mechanism is presented which shows fair agreement with the experimental data from this study and with data obtained from the literature.

Copyright © 1984 by ASME
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