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http://dx.doi.org/10.6110/KJACR.2011.23.3.194

Pool Boiling Heat Transfer Coefficients of Water Up to Critical Heat flux on Enhanced Surfaces  

Lee, Yo-Han (Graduate School, Inha University)
Gyu, Kang-Dong (Graduate School, Inha University)
Jung, Dong-Soo (Department of Mechanical Engineering, Inha University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.23, no.3, 2011 , pp. 194-200 More about this Journal
Abstract
In this work, nucleate pool boiling heat transfer coefficients(HTCs) of pure water are measured on horizontal 26 fpi low fin, Turbo-B and Thermoexcel-E square surfaces of 9.53 mm length. HTCs are taken from 10 $kW/m^2$ to critical heat flux for all surfaces. Test results show that critical heat fluxes(CHFs) of all enhanced surfaces are greatly improved as compared to that of a plain surface. CHFs of water on the 26 fpi low fin surface, Thermoexcel-E surface, and Turbo-B are increased up to 320%, 275%, and 150% as compared to that of the plain surface, respectively. CHF of the Turbo-B enhanced surface is lower than that of the 26 fpi low fin surface due to the surface geometry. The heat transfer enhancement ratios of the Thermoexcel-E surface, low fin surface and Turbo-B enhanced surface are 1.6~2.9, 1.6~2.1, 1.4~1.7 respectively in the range of heat fluxes tested. Judging from these results, it can be said that these types of enhanced surfaces can be used in heat transfer applications at high heat fluxes.
Keywords
Nucleate pool boiling; Heat transfer coefficients; Critical heat flux; Low-fin surface; Turbo-B enhanced surface; Thermoexcel-E enhanced surface;
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