Príspevok
INVESTIGATION OF R744 AC & HEAT PUMP SYSTEMS FOR ELECTRIC VEHICLES WITH EJECTORS
DOI: 10.18462/iir.compr.2024.0656
Sekcia: Special compressors and components II
Stav prijatia: Nebol spracovaný
Autori
| Meno | Organizácia | |
|---|---|---|
| Reza Niroomand, Ph.D. | Norwegian University of Science and Technology | |
| Nina Piesch, M.Sc. | Norwegian University of Science and Technology | |
| Armin Hafner, Ph.D. | Norwegian University of Science and Technology | |
| Krzysztof Banasiak, Ph.D. | Norwegian University of Science and Technology | |
| Fadil Ayad, Ph.D. | Thermal Design Solutions Sarl |
Abstrakt
R744 is considered a highly promising alternative to PFAS-based refrigerants in electric vehicle air conditioning/heat pump systems. However, the throttling loss in an AC/HP cycle using R744 is relatively higher than in a cycle using PFAS producing refrigerants. It is possible to address this challenge by using a two-phase ejector that uses the expansion work of the high-pressure refrigerant to boost and compress the low-pressure refrigerant. In this article, a thermodynamic analysis is carried out to investigate the advantages of integrating a two-phase ejector into the electric vehicle AC/HP cycles. In this study, three cabin cooling modes, two cabin heating modes, and one fast charging mode are investigated. According to the results, the compressor power can be reduced by about 20%. Furthermore, the compressor displacement can be reduced by about 25%.
Kľúčové slová
Carbon Dioxide
Ejector
Mobile Heat Pump
Electric Vehicle
Expansion Work Recovery