| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4993767 | International Journal of Heat and Mass Transfer | 2018 | 9 Pages |
Abstract
In this study, the performance of a new refrigerant, R1234yf/R134a (with a ratio of 89:11, by mass), was measured as alternative to R134a in automotive air conditioning systems using micro-channel heat exchangers in cooling and heating modes. Test results show that the capacities of R1234yf/R134a and R134a are similar in cooling and heating modes. The COP of R1234yf/R134a was lower than that of R134a by 4-9% in cooling mode, while it was lower by 4-16% in heating mode. The average compressor discharge temperature of R1234yf/R134a was up to 10 °C lower than that of R134a in cooling and heating modes. By adding 11% R134a, R1234yf/R134a can be made virtually non-flammable. In addition, R1234yf/R134a has no ozone depletion potential, with a global warming potential of less than 150, thus meeting the requirement of European mobile air-conditioner directives. R1234yf/R134a can be used as an environment-friendly replacement for R134a in automotive air conditioning systems, with minor modifications.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Zhaofeng Meng, Hua Zhang, Mingjing Lei, Yanbin Qin, Jinyou Qiu,