• Title/Summary/Keyword: Pooling boiling

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Heat Transfer Enhancement from Plain and Micro Finned Surfaces According to Liquid Subcooling (작동유체의 과냉도에 따른 매끈한 표면과 마이크로 핀 표면에서의 열전달 촉진에 관한 연구)

  • Lim, Tae-Woo;You, Sam-Sang;Choi, Hyeung-Sik
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.8
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    • pp.1137-1143
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    • 2009
  • Experiments were conducted to evaluate pool boiling heat transfer performance between plain and micro finned surfaces with FC-72, which is chemically and electrically stable. Three kinds of micro fins with the dimension of $100{\mu}m\;{\times}\;10{\mu}m$, $150{\mu}m\;{\times}\;10{\mu}m$ and $200{\mu}m\;{\times}\;10{\mu}m$ (width $\times$ height) were fabricated on the surface of a silicon chip. The experiments were carried out on the liquid subcooling of 5, 10 and 15 K under the atmospheric condition. The micro finned surface with a larger fin width of $200{\mu}m$ provided a better pool boiling heat transfer performance. Also, the micro finned surfaces showed a sharp increase in heat flux with increasing wall superheat and a larger heat transfer enhancement compared to a plain surface.