制冷技术2025，Vol.45Issue(5)：10-16,24,8.DOI:10.3969/j.issn.2095-4468.2025.05.102
泵驱辅助两相回路热虹吸管传热特性实验研究
Experimental Study on Heat Transfer Characteristics of Pump-Assisted Two-Phase Loop Thermosyphon
WANG Zhiyuan 1HUA Yu 1ZHAO Yun 1QU Jian1
作者信息
- 1. School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China
- 折叠
摘要
Abstract
To enhance the heat transfer performance and expand the application range of two-phase loop thermosyphons,experimental studies on the startup and heat transfer characteristics of pump-driven assisted loop thermosyphons with a storage tank are conducted,and comparisons are made with conventional loop thermosyphons.R245fa is selected as a working fluid at the filling ratio range of 60%-80%,and the pump power range is 1.2-2.4 W.The results indicate that the pump-assisted loop thermosyphon can achieve rapid start-up and significantly reduce the evaporator temperature and temperature fluctuations as compared with that of the conventional loop thermosyphon.Additionally,the heat transfer performance of the pump-assisted loop thermosyphon is enhanced with increasing the pump power.At a pump power of 2.4 W and a heating power of 550 W,the thermal resistance of the pump-driven loop thermosyphon is 0.153 K/W,accompanied by a heat transfer coefficient of 2 972.6 W/(m2∙K)in the evaporator section,which is reduced by about 17.7%and increased by about 12.3%,respectively,as compared with the conventional thermosyphon.However,when the pump power is low(less than 1.6 W)and the heating power is high(≥350 W),reflux of condensate toward the evaporator region would be partially depressed by the pump due to its own structure,resulting in reduction in the heat transfer efficiency of the evaporator section.It is necessary to adjust the pump power in a timely manner according to the heat exchange situation in the evaporator section to meet heat dissipation requirements under different working conditions.关键词
两相回路热虹吸管/储液罐/启动/热阻/传热性能Key words
Two-phase loop thermosyphon/Reservoir/Start-up/Thermal resistance/Heat transfer performance分类
通用工业技术引用本文复制引用
WANG Zhiyuan,HUA Yu,ZHAO Yun,QU Jian..泵驱辅助两相回路热虹吸管传热特性实验研究[J].制冷技术,2025,45(5):10-16,24,8.
