Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Heat Transfer Enhancement using Nano Particles coated Surface

나노 코팅을 이용한 열전달 향상에 대한 연구

  • Gang, Myung-Bo (Department of Nuclear & Energy Engineering, Jeju National University) ;
  • KIm, Woo-Joong (KNJ Technology) ;
  • Kim, Nam-Jin (Department of Nuclear & Energy Engineering, Jeju National University)
  • Received : 2018.04.30
  • Accepted : 2018.05.30
  • Published : 2018.06.01
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Abstract

A boiling heat transfer is used in various industry such as power generation systems, heat exchangers, air-conditioning and refrigerations. In the boiling heat transfer system, the critical heat flux (CHF) is the important factor, and it indicated safety of the system. It has kept up studies on the CHF enhancement. Recently, it is reported the CHF enhancement, when working fluid used the nanofluid with excellent thermal properties. Therefore, in this study, we investigated the influence of nano particles coated surface for heat transfer enhancement in pure water, oxidized multi-wall carbon nanotube nanofluid (OMWCNT), and oxidized graphene nanofluid (OGraphene). Nanoparticles were coated for 120 sec on the surface, and we measured the CHF at the flow velocities of 0.5, 1.0, and 1.5 m/sec, respectively. As the results, both of the OMWCNT and OGraphene nanofluids increased up to about 34.0 and 40.0%.

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References

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