制冷学报2024，Vol.45Issue(3)：143-149,7.DOI:10.3969/j.issn.0253-4339.2024.03.143
非共沸工质CO2/R1234yf商超增压制冷系统性能分析
Performance of Supermarket Booster Refrigeration System Using the Zeotropic Working Fluid CO2/R1234yf
摘要
Abstract
To meet the need for energy efficiency improvement and substitution of traditional refrigerants in the field of supermarket refrigeration,a supermarket booster refrigeration system using the eco-friendly zeotropic refrigerant CO2/R1234yf is proposed in this study.A thermodynamic model is established and compared with that of a pure CO2 booster refrigeration system.The results show that the maximum COP(1.40)of the system using CO2/R1234yf was obtained under the optimal CO2 mass fraction(0.94)and discharge pressure(8.81 MPa).The COP of the CO2/R1234yf booster refrigeration system was significantly improved compared with the pure CO2 system,which increased by 7.25%when the ambient temperature was 35℃.The APF improvement of the CO2/R1234yf booster system was 2.68%-4.72%.The APF increased with an increase in the latitude of typical cities.The exergy efficiency of the CO2/R1234yf booster system first increased and then decreased with increasing CO2 mass fraction.The CO2/R1234yf booster refrigeration system exhibited the highest exergy efficiency(0.18)when the CO2 mass fraction was 0.95,which was 4.62%higher than that of the CO2 system.关键词
商超增压制冷系统/非共沸工质/CO2/R1234yf/年性能系数/(火用)分析/能效提升Key words
supermarket booster refrigeration system/zeotropic working fluid/CO2/R1234yf/annual performance factor/exergy analy-sis/energy efficiency improvement分类
通用工业技术引用本文复制引用
滑雪,吴天昊,代宝民,刘圣春..非共沸工质CO2/R1234yf商超增压制冷系统性能分析[J].制冷学报,2024,45(3):143-149,7.基金项目
国家自然科学基金(51806151)资助项目.(The project was supported by the National Natural Science Foundation of China(No.51806151).) （51806151）
