| Title |
Study of Performance Optimization as an Alternative Refrigerant HFC152a in a Mobile Air Conditioning System |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.6.321 |
| Keywords |
대체냉매 ; 환경제어풍동 ; 최대냉방 성능 ; 자동차용 냉방장치 ; 냉매 충전량 Alternative refrigerant ; Climate-controlled wind tunnel ; Cool-down performance ; Mobile air conditioner ; Refrigerant charge quantity |
| Abstract |
This study presents an HFC152a refrigerant air conditioner as an alternative to HFC134a, which is currently used in mobile air conditioning systems. Cool-down performance tests of an HFC152a air conditioning system were conducted and compared to a baseline HFC134a air conditioner. The experimental set-up consisted of a belt-driven compressor, a sub-cooled type condenser, an evaporator, and a block-type thermal expansion valve (TXV). A drop-in test was carried out on the mobile air conditioning system under various vehicle running speeds in a climate-controlled wind tunnel (CWT). Additionally, to optimize the HFC152a air conditioning system, the effects of the TXVs on the performance were studied. The results show that compared to the HFC134a air conditioning system, the refrigerant charge quantity was reduced by approximately 20%, the discharge pressure was reduced by about 350～430 kPa, and the air discharge temperature at vehicle running conditions was 0.5～1.5℃ lower. In addition, good compressor durability was expected due to the lower compression ratio. |