一种微小型平板式热管的传热性能分析

Analysis on heat transfer performance of a micro-miniature flat heat pipe

对一种微小型平板式热管的传热特性在自然对流和强制对流冷却条件下进行了试验研究.并与同尺寸实心铝板的传热性能进行了试验对比.分析了加热功率、冷却强度的变化对平板热管传热性能的影响规律.结果表明:该微小型平板式热管具有良好的启动特性和均温特性.该平板热管的当量导热系数可达到其管壳材料导热系数的12.7倍,强化传热能力的效果相当明显,又克服了传统平板热管抗压能力较差、无法加工较大散热面积的弱点,在电子设备的散热冷却领域具有良好的应用前景.

An experimental investigation was conducted for heat transfer performance of a micro-miniature flat heat pipe under natural and forced convection cooling. Effects of heating power and cooling intensity on the heat transfer performance of the heat pipe were analyzed. Heat transfer performance of an aluminum plate with the same dimensions was also investigated experimentally and compared. Result shows that, the flat heat pipe has good startup characteristics and uniform temperature distribution. The equivalent heat conductivity coefficient of the flat heat pipe can he 12.7 times higher than that of the aluminum plate. The flat heat pipe is convenient for large area machining with high mechanical strength, and thus has good application prospect in heat dissipation for electronic equipment.