热管换热器应用于大功率LED路灯冷却系统的实验研究

研发了一系列将大功率发光二极管(LED)散热和热管传热相结合的用于大功率LED路灯冷却的热管散热器,并对设计出的热管散热器的传热性能进行了实验研究.实验结果表明,该系列热管散热器具有良好的散热能力,能控制节点温度在70℃以下,满足了LED路灯对结点温度的控制要求;同时实验结果表明,改变翅片结构,换热器散热能力明显不同,所研发的具有菱形、开孔形及外翻形翅片的热管换热器散热能力比普通矩形翅片热管换热器的散热能力明显提高,其中以外翻形翅片的热管换热器散热能力最好;另外研究了改变环境温度、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,找到更具应用价值的热管换热器形式;最后研究了热管换热器工作倾角对LED路灯散热能力的影响,倾角越小,散热能力越好,垂直使用时散热能力最差,最后从理论上加以分析.

Experimental Study of Heat Pipe Exchanger for High Power LED Road Lighting Lantern Cooling System

A new cooling concept for high power LED lantern 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.Through experimental results,we found the new heat pipe heat exchangers have the features of higher efficiency of heat dissipation and more compact construction which meets the demand of heat dissipation for high power LED than the traditional heat pipe heat exchangers and the new exchanger with over-fins structure has the best heat dissipation performance.We also studied the effect of environment temperature,heat pipe quantity and fin material on the heat dissipation performance and size and cost of the whole cooling system.Finally we found the heat dissipation performance of the HP heat exchanger changed with the work angle.