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http://dx.doi.org/10.3795/KSME-B.2006.30.1.074

An Experimental Study on Boiling Heat Transfer of PF5060 on the Shape and Orientation of Micro-Fin Surfaces  

Kim Yoon-Ho (고려대학교 대학원 기계공학과)
Kim Choong (고려대학교 대학원 기계공학과)
Lee Kyu-Jung (고려대학교 기계공학과)
Kim Youngchan (고려대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.1, 2006 , pp. 74-81 More about this Journal
Abstract
Experiments to measure the pool boiling heat transfer on the micro-fin surfaces were performed with PF5060. The effects of various orientation and subcooling of heat surface on pool boiling performance were investigated under various heat-flux conditions for plain and micro-fin surfaces. The comparison between the results of this study and those of previous work shows a similar trend at the same conditions. From the results, it is proved that nucleate boiling performance is strongly dependent on the orientation, the micro-fin structure and the subcooling of heat surface. The heat flux on the surface with orientation angles of $45^{\circ}$ and $90^{\circ}$ was larger than that on horizontal surface(${\theta}=0^{\circ}$) at same wall superheat because of the effect of bubble sweeping. The nucleate boiling performance of micro-fin surfaces is enhanced by decreasing the fin size(WxL) and the pitch, respectively. The subcooling makes nucleate boiling performance lower for both micro-fin and plain surfaces.
Keywords
Boiling Heat Transfer; Micro-Fin; Heater Surface Orientation; Subcooling;
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