Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Convective heat transfer characteristics of diamond nanofluid produced by matrix synthetic method

매트릭스합성 분산법에 의해 제조된 다이아몬드 나노유체의 대류열전달 특성

  • 손권 (한국해양대학교 대학원 기계공학과) ;
  • 이정석 ((주)네오엔비즈) ;
  • 박태희 ((주)네오엔비즈) ;
  • 박권하 (한국해양대학교 기계에너지시스템공학부)
  • Received : 2012.07.27
  • Accepted : 2013.01.17
  • Published : 2013.01.31
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Abstract

The effective use and management of energy resources has been issued to solve the global warming problem and petrolium price increase. To improve the energy efficiency of a heat exchanger, a new countermeasure is required and the heat transfer research of nano-fluids as a new working fluid is needed. This study was carried out with increasing the Reynolds number and the vol% of nano-fluids in the inlet temperature of $25^{\circ}C$ and $50^{\circ}C$. As the result, the higher the entrance temperature is, the higher the convective heat transfer coefficient is.

지구 온난화 현상과 유가급등에 따른 에너지 부족 현상은 생산된 에너지의 효율적인 사용과 관리 문제를 부각시켰다. 이에 열교환기의 에너지 효율 향상을 위한 새로운 방안이 요구되었고 새로운 작동유체로서 나노유체의 열전달 특성 연구가 필요한 실정이다. 나노유체의 전도열전달특성의 경우 많은 선행연구에서 예측 가능한 패턴을 보이며 증가한 반면, 대류열전달 특성의 경우 특성이 명확하지 않아 추가적인 연구가 필요한 실정이다. 본 연구에서는 $25^{\circ}C$, $50^{\circ}C$의 입구온도 조건에서 레이놀즈수와 나노유체의 vol%를 증가시키며 실험을 수행하였다. 수행 결과 레이놀즈수와 vol%, 입구 온도가 증가할수록 대류열전달계수가 향상되었다.

Keywords

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