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<p>High-power LED fish-attracting lights for marine fisheries continuously work under high heat-flux conditions. Insufficient heat dissipation inevitably impairs their thermal performance and service durability. To address this engineering bottleneck, this work proposes a composite heat dissipation scheme integrating the chimney effect and heat pipe heat transfer. A chimney-type heat dissipation structure is first designed via topological optimization. Heat pipes are embedded through reserved holes and extrusion-milling processing to promote heat conduction from the PCB substrate to the distal heat dissipation region, and vertical groove texturing is further introduced on the structural surface to enhance convective heat exchange. Numerical simulations and response surface analysis are adopted to clarify the correlation between groove texture parameters and the peak temperature of the lamp, and the optimal texture configuration is obtained by taking peak temperature minimization as the optimization goal. Simulation results indicate that the optimized composite structure reduces the peak temperature by 7.89 °C, corresponding to a 6.70% temperature drop compared with the single topology-optimized structure. Further experimental tests on a self-built thermal platform verify the numerical accuracy. The embedded heat pipes effectively reduce the LED chip junction temperature, while the vertical groove textures perpendicular to the gravity direction expand the heat exchange area, optimize ambient airflow distribution, and significantly improve natural convection heat dissipation.</p>

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Optimization design and simulation research of composite heat dissipation for high-power fish-attracting lamps based on surface texture

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Xinbo Zhang,
  • Yujie Zhang,
  • Xigui Wang

摘要

High-power LED fish-attracting lights for marine fisheries continuously work under high heat-flux conditions. Insufficient heat dissipation inevitably impairs their thermal performance and service durability. To address this engineering bottleneck, this work proposes a composite heat dissipation scheme integrating the chimney effect and heat pipe heat transfer. A chimney-type heat dissipation structure is first designed via topological optimization. Heat pipes are embedded through reserved holes and extrusion-milling processing to promote heat conduction from the PCB substrate to the distal heat dissipation region, and vertical groove texturing is further introduced on the structural surface to enhance convective heat exchange. Numerical simulations and response surface analysis are adopted to clarify the correlation between groove texture parameters and the peak temperature of the lamp, and the optimal texture configuration is obtained by taking peak temperature minimization as the optimization goal. Simulation results indicate that the optimized composite structure reduces the peak temperature by 7.89 °C, corresponding to a 6.70% temperature drop compared with the single topology-optimized structure. Further experimental tests on a self-built thermal platform verify the numerical accuracy. The embedded heat pipes effectively reduce the LED chip junction temperature, while the vertical groove textures perpendicular to the gravity direction expand the heat exchange area, optimize ambient airflow distribution, and significantly improve natural convection heat dissipation.