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Sub-Atmospheric Pressure Pool Boiling of Water on a Screen Laminate-Enhanced, Wavy-Fin Array

[+] Author Affiliations
P. J. Laca, R. A. Wirtz

University of Nevada, Reno, Reno, NV

Paper No. IMECE2010-40678, pp. 263-272; 10 pages
doi:10.1115/IMECE2010-40678
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 4: Electronics and Photonics
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4428-1
  • Copyright © 2010 by ASME

abstract

Saturated pool boiling on vertically oriented, copper, wavy-fin surfaces in water at reduced pressures is investigated. A lamination of fine-filament, wire mesh is an effective surface enhancement for boiling since the surface can be configured to provide a very high density of potential bubble nucleation sites. Two surfaces are considered: a 0.75mm thick 4-layer laminate with approximately 4000 pores per cm2 and a 0.42mm thick 8-layer laminate with approximately 26,000 pores per cm2 . The results show that the 8-layer laminate outperforms the 4-layer laminate. At reduced pressures a reduction in performance is seen for both surfaces. A semi-empirical boiling model is developed. The model predicts the boiling performance of our data within an error of 30%. The model shows that shorter fins improve boiling performance.

Copyright © 2010 by ASME

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