The findings of the experimental study into optimizing the heat transfer rate of a PCM-based heat sink for high-power LEDs are presented in this work. The study investigated five heat sink types, with and without PCM. The LED case and junction temperatures, LED module temperatures, heat storage and release rate analyses, analyses of three types of cyclic operation modes, luminous flux, and heat sink thermal resistance were all examined independently. The results indicated that the PCM-based LED heat sink had improved thermal performance. The LED junction temperature of the PCM-equipped E-20 heat sink is nine degrees Celsius lower at 10 W than that of the heat sink without PCM. Furthermore, the E-20 heat sink with PCM extends the LED module’s critical lifespan. As a bonus, the E-20 with PCM had a 38.19 percent lower thermal resistance at 10 W than the E-20 without PCM. According to these results, the heat sink E-20 emits 715 lm at 10 W when operated without a phase-change material (PCM). With the same input power, the luminous flux of an E-20 equipped with a heat sink and a phase-change material (PCM) is 750 lm, a gain of 4.7%. Finally, clearly recommend the heat E-20 sink with PCM suitable for high-power LED thermal management system.

中文翻译：

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功率LED恒功率和间歇功率模式下PCM输入/输出径向翅片散热器效果的实验研究

这项工作介绍了优化高功率 LED PCM 散热器传热率的实验研究结果。该研究调查了五种散热器类型，包括带和不带 PCM 的散热器。LED外壳和结温、LED模块温度、热存储和释放率分析、三种循环操作模式的分析、光通量和散热器热阻均被独立检查。结果表明，基于 PCM 的 LED 散热器具有改善的热性能。配备 PCM 的 E-20 散热器的 LED 结温在 10 W 时比不带 PCM 的散热器低 9 摄氏度。此外，带有 PCM 的 E-20 散热器延长了 LED 模块的关键使用寿命。此外，具有 PCM 的 E-20 在 10 W 时的热阻比不具有 PCM 的 E-20 低 38.19%。根据这些结果，散热器 E-20 在不使用相变材料 (PCM) 的情况下工作时在 10 W 下发出 715 lm 的光。在相同的输入功率下，配备散热器和相变材料（PCM）的E-20的光通量为750 lm，增益为4.7%。最后，明确推荐适用于大功率LED热管理系统的PCM散热片E-20。