中温水平环路热虹吸管传热性能实验研究  

Experimental Investigation of Heat Transfer Performance of Medium-temperature Horizontal Loop Thermosyphon

作　　者：熊国辉[1] 王银峰[1] 严鑫 范红途 朱跃钊[1] 

机构地区：[1]南京工业大学机械与动力工程学院

出　　处：《化工机械》2017年第5期507-511,共5页Chemical Engineering & Machinery

基　　金：国家自然科学基金项目(51276086);国家科技支撑计划(2014BAJ01B06)

摘　　要：研制了一套中温水平环路热管(HLTS)。采用导热姆作为传热工质,搭建了其传热性能实验平台,考察了该HLTS的启动和传热性能。实验结果表明:U形段液封结构可有效避免热管内部两相工质的双向流动,提升其传热性能;充液率对环路热管传热性能影响较大,初始充液率为45.5%,加热功率为150W时,启动温度为130℃,启动时间为29min,启动性能优于初始充液率为70.5%工况;工作温度为200~400℃时传热热阻0.91~0.69℃/W,传热性能较好。该HLTS可移植和放大,设计用做槽式集热管,实现热管在太阳能中温热利用领域的高效利用。A medium-temperature horizontal loop thermosyphon（ HLTS） was developed. Through taking the dowtherm as working fluid,a platform was set up to investigate the HLTS ＇start-up performance and heat transfer performance. The results show that,the liquid seal structure at the U-segment can effectively prevent two-way flow of two-phase dowtherm within the HLTS and enhance its heat transfer performance; the filling rate has a significant influence on the HLTS＇heat transfer performance. When the filling rate is 45. 5% along with a 150 W heat power,130℃ start-up temperature and 29 min-long start-up time,the HLTS＇starting performance is better than that of the HLTS with a 70. 5% filling rate. The HLTS has better heat transfer performance when the heat transfer resistance ranges from 0. 91℃/W to 0. 69℃/W with the working temperature ranging from 200℃ to 400℃. The HLTS can be transplanted and amplified and taken as a thermal-collecting tube for the groove-type collector used in solar energy utilization.

关 键 词：水平环路热虹吸管 中温 启动特性 充液率 传热性能 

分 类 号：TQ051.21[化学工程]