新型水平环路热虹吸管启动性能

doi:10.11949/j.issn.0438-1157.20151316

化工学报 ›› 2016, Vol. 67 ›› Issue (5): 1755-1761.DOI: 10.11949/j.issn.0438-1157.20151316

新型水平环路热虹吸管启动性能

朱震¹, 王银峰², 熊国辉², 范红途¹, 朱跃钊²

1 南京工业大学能源科学与工程学院, 江苏南京 211816;
2 南京工业大学机械与动力工程学院, 江苏南京 211816

收稿日期:2015-08-19 修回日期:2016-01-11 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: 范红途
基金资助:
国家科技支撑计划项目(2014BAJ01B06);国家自然科学基金项目(51276086)。

Start-up performance of novel horizontal loop thermosyphon

ZHU Zhen¹, WANG Yinfeng², XIONG Guohui², FAN Hongtu¹, ZHU Yuezhao²

1 College of Energy Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China;
2 School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China

Received:2015-08-19 Revised:2016-01-11 Online:2016-05-05 Published:2016-05-05
Supported by:
supported by the National Science and Technology Foundation of China (2014BAJ01B06) and the National Natural Science Foundation of China (51276086).

摘要/Abstract

摘要：

热管作为热超导元件已开始应用于中高温槽式太阳能热利用系统,但太阳辐射频繁变化的特点使得热管启动性能对热管集热性能影响很大。本文研制一套水平环路热管(HLTS),以导热姆为工质,搭建了热管启动性能测试平台,考察充液量、热通量及环境温度对启动性能影响。结果表明,工质流动方向为单向流,充液量对HLTS运行的影响较大,最佳充液量3.325 kg,当水平蒸发段工质充满度为100%时,蒸发段传热流型发生改变,管内形成脉动流;热通量增大时启动时间减少,启动温度为150℃不变;环境温度<9℃时,对热管启动有很大影响,冬季工质凝固,HLTS启动时间延长,影响热管集热。

关键词: 太阳能, 热虹吸管, 传热, 启动特性, 充满度

Abstract:

Thermosyphon has begun to be used in the midium-high temperature trough type solar energy heat utilization system. The characteristics of the solar radiation makes a great influence on the solar collection efficiency in the start-up performance of thermosyphon, and thus solar collecting performance changes. The novel horizontal loop thermosyphon (HLTS) with the dowtherm has been developed. The platform has been set up to test the influence of filling content, heat flux and ambient temperature to the start-up performance of the HLTS. As the result, the direction flow of steam in the evaporator of HLTS is single and the filling content has influenced the operation of heat pipe. The best filling content of injection is 3.325 kg, and the pulsating flow forms in the evaporator when the ratio is 100%. The start-up time changes short when the heat flux increases in the same filling, while the start-up temperature of HLTS does not change and keeps in the temperature of 150℃ when the filling content is 3.325 kg. The best heat flux is 7.619 kW·m^-2 as the NHLT used in the solar collector. Moreover, the low temperature makes the oil frozen in the evaporator at below 9℃ with extending time of the start-up of thermosyphon.

Key words: solar energy, thermosyphon, heat transfer, start-up performance, fullness

中图分类号:

TK172.4

朱震, 王银峰, 熊国辉, 范红途, 朱跃钊. 新型水平环路热虹吸管启动性能[J]. 化工学报, 2016, 67(5): 1755-1761.

ZHU Zhen, WANG Yinfeng, XIONG Guohui, FAN Hongtu, ZHU Yuezhao. Start-up performance of novel horizontal loop thermosyphon[J]. CIESC Journal, 2016, 67(5): 1755-1761.

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新型水平环路热虹吸管启动性能

Start-up performance of novel horizontal loop thermosyphon

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