Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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THE EFFECTS OF RADIAL HEAT SINK GEOMETRY AND SURFACE COATINGS ON THE LED COOLING PERFORMANCE FOR HIGH POWER LED LAMP

고출력 LED 램프 용 방사형 히트싱크의 형상 및 표면코팅이 LED 냉각성능에 미치는 영향에 대한 연구

  • Kim, H.S. (Graduate School, Dept. of Mechanical Engineering, Kumoh Nat'l Institute of Technology) ;
  • Park, S.H. (Dept. of Mechanical Engineering, Kumoh Nat'l Institute of Technology) ;
  • Kim, D. (Dept. of Mechanical Engineering, Kumoh Nat'l Institute of Technology) ;
  • Kim, K. (Dept. of Mechanical System Engineering, Kumoh Nat'l Institute of Technology)
  • 김효성 (금오공과대학교 기계공학과 대학원) ;
  • 박상희 (금오공과대학교 기계공학과) ;
  • 김동주 (금오공과대학교 기계공학과) ;
  • 김경진 (금오공과대학교 기계시스템공학과)
  • Received : 2012.12.12
  • Accepted : 2013.02.21
  • Published : 2013.03.31
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Abstract

The purpose of this study is to investigate the cooling performance of radial heat sink used for high power LED lightings by natural convection cooling with surrounding air. Experimental and numerical analyses are carried out together. Parametric studies are performed to compare the effects of geometric parameters in radial heat sink such as the number of fins, fin height, fin length, and thickness of fin base as well as the surface coatings of radial heat sink. In this study, the cooling of 60 W LED lamp is examined with radiative heat transfer considered as well as natural convection. Numerical results show the optimum condition when the number of fin is 40, heat sink height is 120 mm, fin length is 15 mm, and fin base thickness is 3 mm. The difference in temperature of the LED metal PCB is within $1^{\circ}C$ between numerical analyses and experimental results. Also, the CNT coating on the heat sink surface is found to increase the cooling performance significantly.

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References

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