Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Condensing Characteristics of Pin-finned Surfaces on Pool Boiling in FC-72

풀비등에서 소형 사각기둥핀 배열형상에 따른 FC-72의 응축특성

  • 강상우 (한국과학기술연구원 에너지메카닉스센터) ;
  • 김서영 (한국과학기술연구원 에너지메카닉스센터)
  • Received : 2011.02.25
  • Accepted : 2011.06.09
  • Published : 2011.07.10
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Abstract

As the electronic industry rapidly develops, the heat flux from state-of-the-art electronics increases up to $10^6\;W/m^2$. For this reason, the development of a new cooling technology for high heat flux applications is strongly required. Recently, some cooling technologies using boiling and condensation of working fluid are being adopted to overcome such a technical barrier. In the present study, a smooth boiling surface ($14{\times}14\;mm^2$) was immersed in FC-72 and its vapor was condensed by four different types of condensation surfaces ($30{\times}30\;mm^2$ base). The condensing surfaces were composed of a smooth surface and $1{\times}1\;mm^2$ pin-finned surfaces of 2 mm height with 0.3, 0.5 and 1 mm array spacing. Boiling and condensing characteristics were investigated in detail on their combinations of boiling and condensing surfaces. For a smooth boiling surface the results obtained showed that the pin-finned condensing surface with 1 mm array spacing yielded the best performance and the smooth condensation surface did the worst. Furthermore hysteresis phenomena could be reduced by using enhanced condensing surfaces.

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References

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