Performance Characteristics of Automobile Air Conditioning Using the R134a/R1234yf Mixture

被引：10
作者：
Shin, Yunchan [1 ]
Kim, Taejung [2 ]
Lee, Areum [1 ]
Cho, Honghyun [3 ]
机构：
[1] Chosun Univ, Dept Mech Engn, Grad Sch, Gwangju 61452, South Korea
[2] Korea Polytech VI, Dept Automobile, Yeongju Campus, Yeongju 36142, South Korea
[3] Chosun Univ, Dept Mech Engn, Gwangju 61452, South Korea
来源：
ENTROPY | 2020年 / 22卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
COP (coefficient of performance); exergy destruction; exergy efficiency; GWP (global warming potential); R1234yf; R1234YF/R134A MIXTURE; REFRIGERANT R1234YF; R134A REPLACEMENTS; EXERGY ANALYSIS; ORC SYSTEMS; TEMPERATURE; HFC134A;
D O I：
10.3390/e22010004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this study, the energy and exergy of an automobile refrigeration system using R134a and R134a/R1234yf were analyzed experimentally with respect to outdoor air temperature and compressor speed. As outdoor air temperature increased from 32.5 degrees C to 37.5 degrees C, the coefficient of performance (COP) and total exergy destruction rate of the refrigeration system using Mix30 decreased by 5.19% and 25.8% on average, compared to that of the system using R134a. The exergy efficiency of the Mix30 refrigeration system was on average 21.8% higher than that of the R134a system. As the compressor rotating speed increased from 1000 to 2000 rpm, the cooling capacity of the refrigeration system using R134a and R134a/R1234yf increased, while the COP decreased. The COP and total exergy destruction rate of the refrigeration system using Mix30 decreased by 4.82% and 19.5%, compared to that of the system using R134a. The exergy efficiency of the Mix30 refrigeration system increased on average by 20.7%, compared to that of the R134a system. The total exergy destruction rate of the automobile refrigeration system using R134a/R1234yf decreased with increase in R1234yf, while exergy efficiency increased. In addition, the exergy destruction rate of the automobile refrigeration system decreased as the amount of R1234yf in the R134a/R1234yf automobile refrigeration system increased.
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页数：18
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