沟槽式平板铝热管设计与性能分析

Design and Experimental Analysis of Grooved Flat Aluminum Heat Pipe

基于相变传热原理的微热管在高效太阳能利用热控制方面具有良好应用空间。针对太阳能平板集热器的热控制需求,在沟槽式平板铝热管的设计过程中,综合分析了工质、管壳材料、管芯结构和充液率等因素对性能的影响;并搭建试验平台对制造的沟槽式平板铝热管进行性能测试。得出以下结论:不凝性气体对热管传热性能有较大的影响,应加强热管防漏措施;制作过程应该严格控制清洗、充装、封接等工序以确保质量;适当的充液量有助于提高热管等温性能。

With the working principle of phase-change heat transfer,micro heat pipe has a broad application space in the respect of highly efficient solar thermal control. According to growing thermal control demand for solar plane heat collectors,design of grooved flat aluminum heat pipe was discussed. Various factors influencing heat transfer performance such as working fluid,material of heat pipe shell,wick structure and filling rate were studied. An experimental platform was set up to investigate the characteristics of fabrica-ted heat pipes heat transfer performance both experimentally and analytically. The conclusions are that non-condensable gases has great impact on performance of heat pipes,so measures should be taken to avoid leaking;in order to ensure heat pipe quality,the processes of cleaning,filling of working fluid and sealing need to be careful;reasonable filling rate helps boost heat pipe ability of temperature u-niformity.