热管换热器用于LED冷却系统的实验研究

研发了一系列将发光二极管(LED)散热与热管传热相结合的用于大功率LED冷却的热管散热器,并对其传热性能进行了实验研究。结果表明,该系列热管散热器具有良好的散热能力,能将节点温度控制在70℃以下,满足了大功率LED对结点温度的控制要求;实验结果还表明,翅片结构不同,换热器散热能力明显不同,所研发系列异形翅片热管换热器的散热能力明显高于目前常用的普通矩形翅片热管换热器,其中以外翻形翅片热管换热器散热能力最好;还研究了热管换热器工作倾角对其散热能力的影响,并给出了热管排布数量、翅片材质及结构对换热器散热性能、换热装置体积、成本及质量的影响。

The Experimental Study of Heat Pipe Exchanger for High Power LED Cooling System

A new cooling concept for high power LED by combining the heat release of high power LED with two-phase heat transfer heat pipes was proposed,and in this study a series of heat pipes with specific fins structure were developed.From the experimental results obtained,it is found that the new heat pipe heat exchanger is of high heat dissipation capacity and compact construction that will meet the demand of high power LED cooling.The new heat pipe heat exchangers with different fin shapes have different efficiency of heat dissipation and the new heat exchanger with outwards-radiate fins has the best heat dissipation performance.It is also shown that the heat dissipation performance of the heat pipe heat exchanger changes with the position angle.The effects of the numbers of heat pipes and the fin materials on the heat dissipation performance of the whole cooling system were also carried out.