Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Thermal conductivity characteristics of commercial heat exchange fluids applying diamond nano-powder

다이아몬드 나노분말을 적용한 상용 열교환 유체의 열전도도 특성

  • Son, Kwun (Department of Mechanical Engineering, Korea Marine and Ocean University) ;
  • Lee, Jung-Seok (Department of Mechanical Engineering, Korea Marine and Ocean University) ;
  • Park, Tae-Hee (Neoenbiz, Co.) ;
  • Park, Kweon-Ha (Division of Mechanical & Energy Systems Engineering, Korea Maritime and Ocean University)
  • Received : 2013.07.19
  • Accepted : 2013.09.24
  • Published : 2014.01.31
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Abstract

Nanofluids, suspending nano-particles of various materials, have a good heat transfer characteristics compared with pure base fluids. For the reason, nanofluids have been considered as one of the measure to improve energy efficiency, and studied to apply on a working fluid of a high performance heat exchanger. This study tested thermal conductivities of nanofluids applying diamond nano-powder on DI water, ethylene glycol, and ethyl alcohol. Nanofluids are fabricated by matrix synthetic method, and the volume percent of diamond nano-powder contained in the base fluid are 0.1, 0.3, 0.5, and 1vol%. As a result, thermal conductivities are enhanced with applying diamond nano-power. Especially, the conductivity is highly increased up to 23% at 1vol% nanofluid applying diamond nano-powder on DI water.

기본유체에 나노분말을 분산시킨 나노유체는 기본유체보다 높은 열전도도를 보인다. 이러한 특성으로 인해, 에너지 효율을 향상시키기 위한 대안으로서 나노유체가 주목받고 있으며, 고효율을 필요로 하는 열교환기의 작동유체로 적용하기 위한 많은 연구가 진행되고 있다. 본 연구에서는 상용 열교환기의 작동유체로서 많이 사용되고 있는 증류수, 에틸렌글리콜, 에틸알코올에 나노다이아몬드 분말을 적용한 나노유체의 열전도도를 측정하였다. 나노유체는 매트릭스 합성 분산법을 이용하여 제조하였으며, 나노다이아몬드의 혼합량은 0.1, 0.3, 0.5, 1vol%로 하였다. 측정결과 모든 기본유체 조건에서 나노유체의 열전도도가 증가하였으며, 특히 증류수에 분산된 1vol%의 나노유체에서 23%의 높은 열전도도 향상 경향을 보였다.

Keywords

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