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Optimum design of a radial heat sink with a fin-height profile for high-power LED lighting applications

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  • Jang, Daeseok
  • Yook, Se-Jin
  • Lee, Kwan-Soo

Abstract

Light-emitting diode (LED) lighting offers greater energy efficiency than conventional lighting. However, if the heat from the LEDs is not properly dissipated, the lifespan and luminous efficiency are diminished. In the present study, a heat sink of LED lighting was optimized with respect to its fin-height profile to obtain reliable cooling performance for high-power LED lighting applications. Natural convection and radiation heat transfer were taken into consideration and an experiment was conducted to validate the numerical model. Fin-height profiles reflecting a three-dimensional chimney-flow pattern were proposed. The outermost fin height, the difference between fin heights, and the number of fin arrays were adopted as design variables via sensitivity analysis, and the heat sink configuration was optimized in three dimensions. Optimization was conducted to simultaneously minimize the thermal resistance and mass. The result was compared with the Pareto fronts of a plate-fin heat sink examined in a previous study. The cooling performance of the optimized design showed an improvement of more than 45% while preserving a mass similar to that of the plate-fin heat sink.

Suggested Citation

  • Jang, Daeseok & Yook, Se-Jin & Lee, Kwan-Soo, 2014. "Optimum design of a radial heat sink with a fin-height profile for high-power LED lighting applications," Applied Energy, Elsevier, vol. 116(C), pages 260-268.
    • Handle: RePEc:eee:appene:v:116:y:2014:i:c:p:260-268
    DOI: 10.1016/j.apenergy.2013.11.063
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    References listed on IDEAS

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    5. Srikanth, R. & Nemani, Pavan & Balaji, C., 2015. "Multi-objective geometric optimization of a PCM based matrix type composite heat sink," Applied Energy, Elsevier, vol. 156(C), pages 703-714.
    6. Sungjoon Byun & Seounghwan Hyeon & Kwan-Soo Lee, 2022. "Guide Vane for Thermal Enhancement of a LED Heat Sink," Energies, MDPI, vol. 15(7), pages 1-13, March.
    7. Lin, Xiaohui & Mo, Songping & Jia, Lisi & Yang, Zhi & Chen, Ying & Cheng, Zhengdong, 2019. "Experimental study and Taguchi analysis on LED cooling by thermoelectric cooler integrated with microchannel heat sink," Applied Energy, Elsevier, vol. 242(C), pages 232-238.
    8. Schmid, Gerd & Huang, Zun-Long & Yang, Tai-Her & Chen, Sih-Li, 2017. "Numerical analysis of a vertical double-pipe single-flow heat exchanger applied in an active cooling system for high-power LED street lights," Applied Energy, Elsevier, vol. 195(C), pages 426-438.
    9. Byeong Dong Kang & Hyun Jung Kim & Dong-Kwon Kim, 2017. "Nusselt Number Correlation for Vertical Tubes with Inverted Triangular Fins under Natural Convection," Energies, MDPI, vol. 10(8), pages 1-13, August.

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