摘要
将封闭微喷射流冷却系统应用于发光二极管(LED)散热,实验研究了该系统对高功率LED的散热冷却效果。实验过程中,通过测试LED芯片组中各点的温度,研究了该冷却系统的效果。实验测试表明:在环境温度为25.6℃,LED芯片组输入电功率为2.45 W时,如果不采取散热措施,LED芯片在开始工作1 min后其温度迅速上升到72℃,而当本冷却系统开始工作后,其温度快速下降到34.81℃。当LED芯片输入电功率为9.3 W时,其热流密度为14.53 W/cm2,该冷却系统依然能迅速地把LED芯片温度降到54.34℃。
Experimental investigation on a closed-loop micro jet cooling system for high power LED thermal management was conducted. Therocouples were packaged into the LED substrate to obtain the temperature distribution, which was used to evaluate the cooling performance of the micro jet cooling system. The experimental results show that with 2.45 W input power for LEDs, the LED substrate temperature increases to 72 ℃ from the environment temperature of 25.6 ℃ in one minute when there is not ~ny special cooling means. However, when the present micro jet cooling system begins to work,its temperature decreases to 34.81 ℃ quidely even with 9.3 W input power and corresponding 14.53 W/cm^2 heat flux density,the micro jet cooling system can still keep the LED substrate temperature at 54.34 ℃.
出处
《半导体光电》
EI
CAS
CSCD
北大核心
2007年第4期478-481,486,共5页
Semiconductor Optoelectronics
关键词
LED散热
封闭微喷射流系统
实验研究
LED temperature distribution
closed-loop micro jet cooling system
experimental investigation
