进出口方式对微小通道热沉性能的影响

Effects of Import and Export Structures on Mini-Channel Heat Sinks

搭建微小通道热沉系统实验台,分别测试了单进单出和两进两出方式的微小通道热沉的流动与传热特性。结果表明,在相同体积流量和微小通道热沉结构的条件下,单进单出热沉的传热系数高于两进两出热沉,而压降低于后者。在相同耗功下,单进单出热沉的传热系数明显高于两进两出热沉。同时,单进单出热沉均温性优于两进两出热沉。故热沉进出口采用单进单出的方式性能更优。

Fluid flow and heat transfer processes in mini-channel heat sinks with single import and export or two imports and exports were analyzed with experiment.The result shows that the heat transfer coefficient of mini-channel heat sink with single import and export is larger,the pressure drop of mini-channel heat sink with two imports and exports is larger under the same mini-channel heat sinks structure and the same volume flow rate.Under the same power consumption,single import and export structure is helpful to improve heat transfer coefncient and Temperature uniformity.Therefore,single import and export is a better way for the mini-channel heat sinks.