| 摘要: |
| 为满足商超制冷领域系统能效提升和制冷剂替代的需求，提出了非共沸工质CO2/R1234yf商超增压制冷系统，通过建立热力学模型，与纯CO2商超增压制冷系统进行对比。结果表明：CO2/R1234yf商超增压制冷系统可在最优的CO2质量分数（0.94）及最优排气压力（8.81 MPa）下获得最大COP（1.40）；CO2/R1234yf商超增压制冷系统COP与纯CO2系统相比具有显著提升，环境温度为35 ℃时，提升7.25%；CO2/R1234yf商超增压制冷系统APF提升率为2.68%~4.72%，系统APF随典型城市所处纬度的增加而增大。CO2/R1234yf商超增压系统?效率随CO2质量分数的增加呈先增后减趋势，CO2质量分数为0.95时获得最高?效率，为0.18，相比纯CO2系统提升4.62% |
| 关键词: 商超增压制冷系统 非共沸工质 CO2/R1234yf 年性能系数 㶲分析 能效提升 |
| DOI：10.3969/j.issn.0253-4339.2024.03.143 |
| 投稿时间：2023-06-26 修订日期：2023-08-15
录用日期：2023-08-25 |
| 基金项目:国家自然科学基金（51806151）,生态环境部对外合作与交流中心资助项目（No. C/III/S/19/052）资助项目。 |
|
| Performance of Supermarket Booster Refrigeration System Using the Zeotropic Working Fluid CO2/R1234yf |
|
Hua Xue1, Wu Tianhao2, Dai Baomin2, Liu Shengchun2
|
| (1.Foreign Environmental Cooperation Center, Ministry of Ecology and Environment of China;2.Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce) |
| 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. |
| Key words: supermarket booster refrigeration system zeotropic working fluid CO2/R1234yf annual performance factor exergy analysis energy efficiency improvement |
