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Pool Boiling of FC-72: A Comparison of Two Thin Porous Coatings on Heat Transfer Enhancement

[+] Author Affiliations
Kuiyan Xu, John R. Lloyd

Michigan State University

Paper No. IMECE2005-81230, pp. 279-287; 9 pages
doi:10.1115/IMECE2005-81230
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4222-3 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

The present research is an experimental study of pool boiling behavior of surfaces coated with thin porous layers. The fluid employed is FC-72, a highly-wetting dielectric perfluorocarbon with zero ozone-depletion potential (ODP). This creates the potential for electronic cooling application. Different surfaces, including the super-smooth surface (SSS), the High Flux™ surface (HFS), and the new electrochemical deposition surface (EDS) were tested, and the test results were compared. Both subcooled and saturated fluid pools were studied. The boiling hysteresis phenomenon was studied for these surfaces under different boiling conditions, which include the fluid bulk temperature and the non-boiling immersion time. Results of the study showed that the porous-coated surface dramatically enhanced the nucleate boiling heat transfer performance. The boiling hysteresis phenomenon is more prominent on porous-coated surfaces than on smooth surfaces, and subcooling can deteriorate this phenomenon.

Copyright © 2005 by ASME

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