一种回路热管对大功率LED散热的研究  

Study of a loop heat pipe used to cool high-power LED

作　　者：鲁祥友[1,2] 华泽钊[2] 王晏平[1] 仲勇[1] 林媛[1] 

机构地区：[1]安徽建筑工业学院建筑能效控制与评估教育部工程研究中心,安徽合肥230022 [2]上海理工大学,上海200093

出　　处：《光电子．激光》2012年第9期1676-1680,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(51076107);安徽省自然科学基金(11040606M111);安徽省教育厅自然科学基金(KJ2012A060)资助项目

摘　　要：针对大功率LED散热能力较其它照明灯具差这一问题,研制了一种应用在多芯片大功率LED散热上的回路热管装置,并研究了热负荷、倾角等对热管的起动性、均温性和热阻等的影响。试验结果表明,所设计的热管散热器的热阻在0.48～1.47K/W之间;在蒸发器倾斜角为0°和30°时,蒸发器的均温性分别被控制在1.5℃和4.3℃以内。因此,将这种结构的热管应用在大功率LED散热系统中时,首先应该对蒸发器倾斜角度对系统散热性能的影响进行测试评估。Compared with other lighting lamps, the thermal problem is still a bottleneck to limit the stability,reliability and lifetime of high-power LEDs. The thermal capabilities, including startup performance, temperature uniformity and thermal resistance of the loop heat pipe used on multi-chip high-power LEDs, under different heat loads and incline angles have been investigated experimentally. The obtained results indicate that the thermal resistance of the heat pipe heat sink is in the range of 0. 48-- 1.47 K/ W. The surface temperature difference of the evaporator is controlled nearly within 1.5 ℃ and 4. 3 ℃ for 0°and 30° incline angle, respectively. Therefore, the impact of the incline angle of the evaporator on the beat transfer performance of the loop heat pipe should be assessed before such a structure of loop heat pipe is used to cool high-power LED system.

关 键 词：大功率LED 热阻 回路热管 结温 均温性 

分 类 号：TN312.8[电子电信—物理电子学] TK172.4[动力工程及工程热物理—热能工程]