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Thermal Assessment of Laminar Flow Liquid Cooling Blocks for LED Circuit Boards Used in Automotive Headlight Assemblies

Author

Listed:
  • Muhsin Kilic

    (Mechanical Engineering Department, Bursa Uludag University, 16240 Bursa, Turkey)

  • Mehmet Aktas

    (Magneti Marelli Mako Elektrik Sanayi ve Tic. A.S., 16159 Bursa, Turkey)

  • Gokhan Sevilgen

    (Automotive Engineering Department, Bursa Uludag University, 16240 Bursa, Turkey)

Abstract

This research work presents a comparative thermal performance assessment of the laminar flow cooling blocks produced for automotive headlight assembly using a high power Light Emitting Diode (LED) chip. A three-dimensional numerical model with conjugate heat transfer in solid and fluid domains was used. Laminar flow was considered in the present analysis. The validation of the numerical model was realized by using the measured data from the test rig. It was observed that substantial temperature variations were occurred around the LED chip owing to volumetric heat generation. The cooling board with lower height performs better thermal performance but higher pressure drop for the same mass flow rates. The cooling board with the finned cover plate performs better thermal performance but results in an increased pressure drop for the same mass flow rates. Increasing the power of the LED results in higher temperature values for the same mass flow rates. The junction temperature is highly dependent on the mass flow rates and LED power. It can be controlled by means of the mass flow rate of the coolant fluid. New Nusselt number correlations are proposed for laminar flow mini-channel liquid cooling block applications.

Suggested Citation

  • Muhsin Kilic & Mehmet Aktas & Gokhan Sevilgen, 2020. "Thermal Assessment of Laminar Flow Liquid Cooling Blocks for LED Circuit Boards Used in Automotive Headlight Assemblies," Energies, MDPI, vol. 13(5), pages 1-19, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1202-:d:328831
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    Citations

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    Cited by:

    1. Peng Sun & Yiping Lu & Jianfei Tong & Youlian Lu & Tianjiao Liang & Lingbo Zhu, 2021. "Study on the Convective Heat Transfer and Fluid Flow of Mini-Channel with High Aspect Ratio of Neutron Production Target," Energies, MDPI, vol. 14(13), pages 1-15, July.
    2. Muhsin Kılıç & Sevgül Gamsız & Zehra Nihan Alınca, 2023. "Comparative Evaluation and Multi-Objective Optimization of Cold Plate Designed for the Lithium-Ion Battery Pack of an Electrical Pickup by Using Taguchi–Grey Relational Analysis," Sustainability, MDPI, vol. 15(16), pages 1-28, August.

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