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

  • 제33권10호
  • /
  • Pages.729-736
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  • 2009
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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평판형 히터를 이용한 알루미늄과 타이타늄 산화물 나노유체의 풀비등 임계열유속에 관한 실험적 연구

Experimental Investigation on the Pool Boiling Critical Heat Flux of Water-Based Alumina and Titania Nanofluids on a Flat Plate Heater

  • 안호선 (포항공과대학교 기계공학과) ;
  • 김형대 (포항공과대학교 기계공학과) ;
  • 조항진 (포항공과대학교 기계공학과) ;
  • 강순호 (포항공과대학교 기계공학과) ;
  • 김무환 (포항공과대학교 기계공학과)
  • 발행 : 2009.10.01
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초록

Pool boiling heat transfer and critical heat flux (CHF) of water-based nanofluids with alumina and titania nanoparticles of 0.01% by volume were investigated on a disk heater at saturated and atmospheric conditions. The experimental results showed that the boiling in nanofluids caused the considerable increase in CHF on the flat surface heater. It was revealed by visualization of the heater surface subsequent to the boiling experiments that a major amount of nanoparticles deposited on the surface during the boiling process. Pool boiling of pure water on the surface modified by such nanoparticle deposition resulted in the same CHF increases as what boiling nanofluids, thus suggesting the CHF enhancement in nanofluids was an effect of the surface modification through the nanoparticle deposition during nanofluid boiling. Possible reasons for CHF enhancement in pool boiling of nanofluids are discussed with surface property changes caused by the nanoparticle deposition.

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참고문헌

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