@article{Hua2024, 
author = {Xue Hua and Tianhao Wu and Baomin Dai and Shengchun Liu},
title = {Performance of Supermarket Booster Refrigeration System Using the Zeotropic Working Fluid CO2/R1234yf},
year = {2024},
journal = {Journal of Refrigeration},
volume = {45},
number = {3},
pages = {143-149},
keywords = {supermarket booster refrigeration system, zeotropic working fluid, CO2/R1234yf, annual performance factor, exergy analysis, energy efficiency improvement},
url = {https://www.sciopen.com/article/10.3969/j.issn.0253-4339.2024.03.143},
doi = {10.3969/j.issn.0253-4339.2024.03.143},
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.}
}