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Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study

Author

Listed:
  • Yong-Dong Zhang

    (Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan)

  • Miao-Ru Chen

    (Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan)

  • Jung-Hsien Wu

    (Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan)

  • Kuo-Shu Hung

    (Green Energy & Environment Research Laboratories, Industrial Technology Research Institute, Chutung 310, Taiwan)

  • Chi-Chuan Wang

    (Department of Mechanical Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan)

Abstract

This study proposes a novel design having dense fins with lesser thickness at the upper layer and comparatively spare fins with greater thickness in the lower layer to further improve the overall thermal performance of a double-layer microchannel heat sink. The design can effectively direct more low temperature fluid flow toward the lower layer to improve heat transfer while the sparse fin structure at low layer can ease pressure drop penalty. At the same time, the thicker fins at the lower layer ensure higher fin efficiency to facilitate high heat transfer. Parametric and detailed analysis is conducted for the proposed double-layer microchannel heat sink in comparison with the traditional one. After optimization, the thermal resistance of the proposed double-layer microchannel heat sink at the same pumping power is found to be reduced by 9.42% when compared to the traditional double-layer microchannel heat sink. Yet at the same Reynolds number, the Nusselt number of the proposed design exceeds the traditional value by 13%.

Suggested Citation

  • Yong-Dong Zhang & Miao-Ru Chen & Jung-Hsien Wu & Kuo-Shu Hung & Chi-Chuan Wang, 2021. "Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study," Energies, MDPI, vol. 14(12), pages 1-23, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3585-:d:575971
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    Citations

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    Cited by:

    1. Min-Seob Shin & Santhosh Senguttuvan & Sung-Min Kim, 2021. "Investigations of Flow and Heat Transfer Characteristics in a Channel Impingement Cooling Configuration with a Single Row of Water Jets," Energies, MDPI, vol. 14(14), pages 1-16, July.
    2. Łukasz Adrian & Szymon Szufa & Piotr Piersa & Filip Mikołajczyk, 2021. "Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers," Energies, MDPI, vol. 14(22), pages 1-38, November.

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