Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Study on Boiling Heat Transfer of PF5060 on the Shape and Orientation of Micro-Fin Surfaces

마이크로휜 표면과 발열체 기울기에 따른 PE5060의 비등 열전달에 관한 실험적 연구

  • 김윤호 (고려대학교 대학원 기계공학과) ;
  • 김충 (고려대학교 대학원 기계공학과) ;
  • 이규정 (고려대학교 기계공학과) ;
  • 김용찬 (고려대학교 기계공학과)
  • Published : 2006.01.01
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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.

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References

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