制冷学报2018，Vol.39Issue(1)：13-19,7.DOI:10.3969/j.issn.0253-4339.2018.01.013
机械过冷CO2跨临界制冷循环性能理论分析
Theoretical Performance Analysis of CO2 Transcritical Refrigeration Cycle with Mechanical Subcooling
摘要
Abstract
The performance of the CO2 transcritical refrigeration cycle can be improved,and the throttling irreversibility loss can be reduced,by subcooling CO2 at the outlet of the gas cooler with a vapor compression refrigeration cycle (auxiliary cycle).A thermodynamical analysis is performed to study the operation characteristics of the CO2 transcritical refrigeration cycle with mechanical subeooling,and the results indicate that the maximum coefficient of performance (COP) is achieved at the optimum discharge pressure and optimum subcooling temperature.Compared with the traditional CO2 transcritical cycle,the improvement in COP is more significant at higher ambient temperatures and lower evaporation temperatures,and the discharge pressure and temperature can be notably reduced by the auxiliary cycle.The energy consumption of the auxiliary cycle compressor is much lower than that of the CO2 compressor.Among the 11 auxiliary cycle refrigerants,the differences between the COP improvements of the other 10 auxiliary working fluids are not obvious,except for R41.The CO2 transcritical cascade refrigeration cycle is more applicable to working conditions with higher ambient temperatures and lower evaporation temperatures.关键词
CO2/跨临界/机械过冷/制冷循环Key words
CO2/transcritical/mechanical subcooling/refrigeration cycle分类
通用工业技术引用本文复制引用
代宝民,刘圣春,孙志利,齐海峰,陈启,王晓明,马一太..机械过冷CO2跨临界制冷循环性能理论分析[J].制冷学报,2018,39(1):13-19,7.基金项目
国家自然科学基金(51006073)资助项目.(The project was supported by the National Natural Science Foundation of China (No.51006073).)本文受天津商业大学国家基金培育(160121)和天津市高等学校自然科学研究项目资助.(The project was supported by the Cultivation National Project of Tianjin University of Commerce (No.160121) and Natural Science Research Project of Tianjin Higher Learning Institution.) （51006073）
