Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Study on Heat Transfer and Fouling of Flow Boiling Systems using Oxidized Graphene Nanofluid

유동 비등 시스템에서 산화 그래핀 나노유체의 열전달 및 파울링에 대한 연구

  • Kim, Woo-Joong (Industry-Academic Cooperation Foundation, Jeju International University) ;
  • Kim, Nam-Jin (Department of Nuclear and Energy Engineering, Jeju National University)
  • 김우중 (제주국제대학교 산학협력단) ;
  • 김남진 (제주대학교 에너지공학과)
  • Received : 2016.04.14
  • Accepted : 2016.05.20
  • Published : 2016.06.30
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Abstract

The nanofluids are the fluids with excellent thermal property, it is expected as a working fluid of the next generation. The nanofluids are well known that if it is used in the boiling heat transfer system, the critical heat flux is enhanced up to 200%, and the thermal conductivity is increased up to from 10 to 160%. However, the fouling phenomenon can be occurred that nanoparticles of nanofluids are deposited on the heat transfer surface. Therefore, to investigate relation between nanofluid and fouling, this study is carried out using oxidized graphene nanofluid. Also it compared and analyzed the critical heat flux and the boiling heat transfer coefficient. As the result, in case of oxidized graphene deposition for fouling, the critical heat flux is increased up to 20% more than oxdized graphene nanofluid. However, the boiling heat transfer coefficient is decreased down to about $6kW/m^2K$ at $1,000kW/m^2$ more than pure water.

Keywords

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