N─甲基吡咯烷酮两相闭式热虹吸管传热特性的实验研究  

EXPERIMENTAL STUDY ON HEAT TRANSFER PERFORMANCE OF N-METHYL PYRROLIDONE TWO-PHASE CLOSED THERMOSYPHON

作　　者：童明伟[1] 童庆明[1] 陈礼[1] 张洪济[1] 

机构地区：[1]重庆大学热力工程系

出　　处：《工程热物理学报》1994年第2期185-189,共5页Journal of Engineering Thermophysics

基　　金：重庆市科委小额资助

摘　　要：本文报道了用Ｎ—甲基吡咯烷酮（Ｃ５Ｈ９ＮＯ３）为工质以光滑管与三维内翅片管为管壳制成的两相闭式逆流热虹吸管的传热特性。实验结果表明在工作温度为２２０～３５０℃，热负荷为８．２～１７．３ｋＷ／ｍ２范围内光滑热虹吸管蒸发段与凝结段换热系数的积分平均值分别约为１７００Ｗ／ｍ２·℃和１６００Ｗ／ｍ２·℃。由于三维翅片的强化传热作用，使三维内翅片热虹吸管蒸发段与凝结段换热系数分别比光滑管增大了２０％～４０％和７０％～１６０％。实验表明Ｎ—甲基吡咯烷酮综合传热性能优于萘，可望作为中温热管工质使用。Experimental study has been carried out to investigate heat transfer perfor-mance of two-phase closed thermosyphon with N-methyl pyrrolidone (C5H9NO3) as working medium.The result shows that at operation temperature ranged from 220℃ to 350℃ and heat flux 8.2￣17.3kW/m2, the integral mean value of evaporation and condensation heat transfer coefficient for a smooth thermosyphon are about 1700 W/m2.℃ and 1600 W/m2.℃ seperately, while the enhanced heat transfer structure of the internal three-dimensional finned thermosyphon increases them by 20% ￣ 40% and 70% ￣ 160% respectively. This indicates that N-methyl pyrrolidone is superior to naphthalene in comprehensive heat transfer performance and is suitable to be used in moderate-temperature heat pipe.

关 键 词：热虹吸管 中温工质 传热性能 

分 类 号：TK12[动力工程及工程热物理—工程热物理]