制冷学报2016，Vol.37Issue(5)：17-25,9.DOI:10.3969/j.issn.0253-4339.2016.05.017
分离式CO2热管传热性能分析
Heat Transfer Performance Analysis on the CO2 Two-phase Thermosyphon Loop
摘要
Abstract
In terms of environmental conservation, it is very meaningful to use CO2 as working fluid in the two⁃phase thermosyphon loop ( TPTL) to replace R22. According to the experimental results in some research, the flow boiling or condensation heat transfer coefficient of CO2 is much higher than that of the conventional refrigerants, which means CO2 has the potential in improving the heat transfer perform⁃ance of the TPTL system. Considering the high heat transfer coefficient of the refrigerant, the convective thermal resistance of the air/water outside is the main restriction of the performance. Thus, the improvement of the heat transfer performance by using CO2 may be limited. The present study compares the heat transfer performance of CO2 and R22 TPTL through experiment. Combined with some heat transfer model, each part of the thermal resistance is analyzed. The result shows that the total thermal resistance of CO2 TPTL is 22% -25% low⁃er than that of R22 TPTL due to the reduction of the boiling and condensation thermal resistance.关键词
分离式热管/CO2/流动传热/热阻Key words
two-phase thermosyphon loop/CO2/flow heat transfer/thermal resistance分类
通用工业技术引用本文复制引用
佟振,李震,赵勇,刘晓华..分离式CO2热管传热性能分析[J].制冷学报,2016,37(5):17-25,9.基金项目
国家科技支撑计划（2014BAJ02B01）资助项目。（ The project was supported by the Key Technologies R＆D Program of China （ No．2014BAJ02B01）．） （）
