Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Boiling Heat Transfer Characteristics of Deionized Water in Microchannel

마이크로 채널에서 물의 비등 열전달 특성

  • 임태우 (한국해양대학교 기관공학부) ;
  • 유삼상 (한국해양대학교 기계.에너지시스템공학부) ;
  • 최형식 (한국해양대학교 기계.에너지시스템공학부) ;
  • 김동혁 (한국해양대학교 기계.에너지시스템공학부)
  • Received : 2011.06.15
  • Accepted : 2011.08.10
  • Published : 2011.09.30
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Abstract

An experimental study was carried out to measure the heat transfer coefficient in flow boiling to deionized water in a microchannel having a hydraulic diameter of $500{\mu}m$. Tests were performed in the ranges of heat fluxes from 100 to 400 kW/$m^2$, vapor qualities from 0 to 0.2 and mass fluxes of 200, 400 and 600 kg/$m^2s$. From the experimental results, it is found that the measured heat transfer coefficients is independent of mass flux and quality, and is somewhat dependent of heat flux. Measured data of heat transfer are compared to a few available correlations proposed for macroscale. The previous correlations for macroscale overpredicted the flow boiling heat transfer coefficient for the test conditions considered in this work.

본 연구에서는 $500{\mu}m$의 수력 직경을 가지는 마이크로 채널에서 물에 대한 유동 비등 열전달계수를 측정하기 위한 실험적 연구를 수행하였다. 실험 영역은 열유속이 100~400 kW/$m^2$이고, 증기 건도가 0~0.2 그리고 질량유속이 200, 400 그리고 600 kg/$m^2s$의 범위에서 이루어졌다. 실험결과 측정된 열전달계수는 질량유속과 증기건도에는 의존하지 않으며, 열유속에는 다소 의존하는 것으로 나타났다. 또한 측정된 열전달계수는 매크로스케일에서 제안된 몇몇 상관식들과 비교하였으며, 기존의 상관식들은 본 연구의 실험 조건에서 얻어진 유동 비등 열전달계수를 높게 예측하였다.

Keywords

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