随着LED芯片单颗功率和封装集成度的提高,散热问题已成为大功率LED迫切需要解决的问题.文章提出了一种基于相变传热的一体化大功率LED太阳花散热器,利用正交实验和模拟仿真相结合的方法对太阳花散热器进行了优化,分析了中心孔直径和翅片参数的改变对散热器性能的影响.将数值模拟的结果与实测值进行了对比,结果表明:散热器的热性能影响因素从主到次为翅片厚度,数目,高度,中心孔直径,最佳方案最高温度降低了5.94 ℃,优化后的散热器能够满足200 W以上集成LED灯的散热要求.
Abstract
With the improvement of the LED power and the package integration, heat dissipation has become an urgent issue to be solved. This study proposed an integrated high-power LED radiator based on phase-change heat transfer, which realized the seamless connection between the high-efficient heat-transfer cavity and the cooling fins, and eliminated the contact resistance of the radiator. The radiator was optimized by using the approach combining the orthogonal tests and the numerical simulations. The effects of the central-hole diameter and the fin parameters on the radiator performance were analyzed. The numerical simulation results were compared with the measured values. The results showed that the factors that affected the radiator performance were the fin thickness, the fin number, the fin height and the central-hole diameter from primary to secondary. The maximum temperature for the optimized scheme was 5.94 ℃ lower. The optimized radiator is capable of meeting the cooling requirements of the integrated LED lights above 200 W.
关键词
大功率LED /
太阳花散热器 /
数值优化 /
正交试验
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Key words
high-power LED /
radiator /
numerical optimization /
orthogonal experiment
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参考文献
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脚注
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基金
广东省自然科学基金资助项目(S2013010013469, S2011040004110, S2012010009505); 广东省高校科技创新资助项目(2013KJCX0143); 广州市属高校科研计划资助项目(2012A083).
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