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An Experimental Investigation for Studying the Effect of Heating Element Shape During Pool Boiling

[+] Author Affiliations
Ahmed ElGafy, Khalid Lafdi

University of Dayton Research Institute, Dayton, OH

Paper No. HT2003-47416, pp. 567-572; 6 pages
doi:10.1115/HT2003-47416
From:
  • ASME 2003 Heat Transfer Summer Conference
  • Heat Transfer: Volume 2
  • Las Vegas, Nevada, USA, July 21–23, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3694-0 | eISBN: 0-7918-3679-7
  • Copyright © 2003 by ASME

abstract

An experimental study is performed to investigate and predict the influence of the heating element shape on nucleate pool boiling heat transfer from vertical cylindrical heating elements. An experimental apparatus test is designed and fabricated for this purpose, while water is utilized as the working fluid. Five vertical cylindrical heating elements with different shapes are used. The average heat transfer coefficient is calculated for each case and a shape factor, which includes the heating element geometry, is introduced for each heating element. An empirical correlation is obtained to relate the mean heat transfer coefficient with the heat flux and shape factor. Another correlation is obtained to relate the mean heat transfer coefficient with the saturation temperature difference and the shape factor. A comparative study is performed between the enhancement ratio and both the area ratio and shape factor ratio.

Copyright © 2003 by ASME

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