Measured Variations in Local Surface Temperatures in Pool Boiling of Water

[+] Author and Article Information
S. T. Hsu, F. W. Schmidt

University of Wisconsin, Madison, Wis.

J. Heat Transfer 83(3), 254-260 (Aug 01, 1961) (7 pages) doi:10.1115/1.3682252 History: Received February 15, 1960


An investigation of the surface-temperature variation during nucleate pool boiling at atmospheric pressure was conducted. The effect of surface temperature, heat flux, and heating-surface material was investigated. The temperature variation of the surface was found by a specially fabricated thermocouple placed in contact with it. The average maximum temperature variation may be found from the following equation:

ΔTavg max = c[q(f/α)1/2]−αqΔTsur−satk
The exponent a is a function of surface roughness. The rate of heat flow was denoted by q in Btu/sq ft-hr, α the thermal diffusivity in sq ft/hr, f the frequency of variations in cphr, k the thermal conductivity in Btu/ft-hr-deg F, and ΔTsur−sat the temperature difference between the heating surface and the saturation temperature of water. The coefficient c and exponent a were determined experimentally for various heating-surface materials and surface finishes.

Copyright © 1961 by ASME
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