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2017 Vol.37, Issue 6 Preview Page
Study on the Oxidation Treatment of Nanoparticles for the Critical Heat Flux

임계열유속 향상을 위한 나노물질의 산화처리에 대한 연구

Woo-Joong Kim1
,
Yong-Han Jeon2
,
Nam-Jin Kim3*
김 우중1
,
전 용한2
,
김 남진3*
1Korea Electric Vehicle Maintenance Cooperative
2Department of Fire and Frotection, Sangji-Youngseo College
3Department of Nuclear & Energy Engineering, Jeju National Univ.
1한국전기차정비협동조합
2상지영서대학교 소방안전과
3제주대학교 에너지공학과
*교신저자. *Corresponding Author. 
30 December 2017. pp. 39-49
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Abstract

Pool boiling, one of the key thermal-hydraulics phenomena, has been widely studied for improving heat transfer efficiencies and safety of nuclear power plants, refrigerating systems, solar-collector heat pipes, and other facilities and equipments. In the present study, the critical heat flux (CHF) and heat-transfer coefficients were tested under the pool-boiling state using graphene M-5 and M-15 nanofluids as well as oxidized graphene M-5 nanofluid. The results showed that the highest CHF increase for both graphene M-5 and M-15 was at the 0.01% volume fraction and, moreover, that the CHF-increase ratio for small-diameter graphene M-5 was higher than that for large-diameter graphene M-15. Also at the 0.01% volume fraction, the oxidized graphene M-5 nanofluid showed a 41.82%-higher CHF-increase ratio and a 26.7%-higher heat-transfer coefficient relative to the same nanofluid without oxidation treatment at the excess temperature where the CHF of distilled water occurs.

Keywords
Heat transfer
Boiling
Graphene
Oxidation
Critical heat flux

키워드
열전달
비등
그래핀
산화
임계열유속
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Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 37
  • No :6
  • Pages :39-49
  • Received Date : 2017-08-23
  • Revised Date : 2017-12-13
  • Accepted Date : 2017-12-29
  • DOI :https://doi.org/10.7836/kses.2017.37.6.039
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