分离型热管单管回路传热特性实验研究  

Experimental Study of the Heat Transfer Characteristics of the Single Tube Loop of a Separate Type Heat Pipe

作　　者：易冲冲[1] 王文[1] 王博杰[1] 郑文龙[1] 

机构地区：[1]上海交通大学制冷与低温研究所,上海200240

出　　处：《热能动力工程》2014年第6期633-638,755-756,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(51206110);科技部重大技术专项(ZB01K04)

摘　　要：分离型热管作为高效的非能动传热元件,在工业领域得到了广泛的应用。本研究以氨为工质,对分离型热管单管回路开展了实验研究,主要探讨了热源温度与充液率对热管传热性能的影响。实验结果表明:外界热源温度越高,管内工作温度越高,热管换热量越大;氨的沸腾换热系数随外界热流密度增大而增大,实验条件下,最高可达到7 000 W/(m2·K);水平冷凝管壁存在周向温差;在不同的工况下,分离式热管都存在一个最佳充液率,且在一定范围内随着外界热负荷的升高而增大。As high efficiency non-energy-driven heat transfer elements,separate type heat pipes have obtained a wide use in industry.With ammonia serving as the working medium,an experimental study was performed of the single tube loop of a separate type heat pipe.In this connection,the influence of the temperature of the heat source and the liquid filling rate on the heat transfer performance of the heat pipe was mainly discussed.The test results show that the higher the temperature of the heat source,the higher the working temperature in the heat pipe and the larger theheat quantity exchanged by the heat pipe.The boiling heat exchange coefficient of ammonia will increase with an increase of the heat flux density,being up to 7 000 W /( m2·K) under the test conditions.In addition,it has been found that the horizontal condensing tube wall has its circumferential temperature difference.Under different operating conditions,there exists an optimum liquid filling rate for a separate type heat pipe and in a certain range,will increase with an increase of the heat load.

关 键 词：分离型热管 最佳充液率 氨 

分 类 号：TK24[动力工程及工程热物理—动力机械及工程]