平板微热管阵列在LED散热装置中的应用

Applied Investigation on LED Heat Cooling Equipment Using Flat Micro-Heat Pipe Arrays

针对目前大功率LED灯的散热问题,研制了高效散热器件——平板微热管阵列。实验表明,平板微热管阵列具有良好的热输运能力,当蒸发段表面温度为69.5℃时,热流密度能够达到143.2 W/cm2。利用该平板微热管阵列设计了用于LED散热的散热装置,并进行了相关的实验测试和模拟研究。结果表明,该散热装置散热效果良好,测得的光源基座处的温度均低于70℃,大大低于对结温的要求。模拟结果与实验结果误差在4%以内,模型合理,可以用于该散热装置的优化设计。

The flat micro-heat pipe arrays with miniature axially grooves for LED cooling were constructed. The experiments show that the flat micro-heat pipe arrays has the highest heat flux of evaporator, which is 143.2 W/cm2 when the temperature on the evaporator is 69.5 ℃. The high efficient heat cooling equipments of LED using flat micro heat pipe arrays were designed and a series of experiments were carried out. The results show that the base temperatures of LED are below 70℃ , much lower than the junction temperature of LED. The numerical simulation results show that the error between the experiments and simulation results is within 4% and there is a good agreement. The numerical model can be used in the optimization of the LED cooling equipment.