Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7047965 | Applied Thermal Engineering | 2016 | 36 Pages |
Abstract
This paper presents an experimental performance investigation and exergy analysis using R1234yf in an automotive air conditioning system. The R1234yf system with an internal heat exchanger (IHX) was compared with an R1234yf system without the IHX and an R134a system. The R1234yf system had 4.0-7.0% smaller cooling capacity and 3.6-4.5% lower COP compared to the R134a system. With the IHX, the R1234yf system showed almost equivalent cooling capacity to the R134a system. The COP of the R1234yf system with the IHX is lower than that of the R134a system by 0.3-2.9% for a compressor speed of 800-1800ârpm. The COP increased by 0.9% at a compressor speed of 2500ârpm. The second law efficiency of the R1234yf system was 3.4-4.6% lower than that of the R134a system at all compressor speeds. The second law efficiency of R1234yf with the IHX was improved by 1.5-4.6% compared to the R1234yf system without the IHX. The EDR of the R1234yf system was 0.5-3.3% higher than that of the R134a system in the range of 800-1800ârpm. However, the R1234yf system with the IHX had 1.2% lower EDR than the R134a system at a compressor speed of 2500ârpm.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Honghyun Cho, Chasik Park,