Akademik Veri Yönetim Sistemi
INDIAN JOURNAL OF PHYSICS, 2026 (SCI-Expanded, Scopus)
In this study, the thermodynamic performance (COP, exergy efficiency, exergy destruction, compressor work, and condenser heat release) of 1,1,1,2-tetrafluoroethane (R134a), trans-1,3,3,3-tetrafluoropropene (R1234ze(E)), and R450A refrigerants at different compressor pressure ratios was investigated. This analysis aims to provide a comprehensive understanding of the efficiency and sustainability of these refrigerants in automotive air conditioning systems. Additionally, the molecular structures, electronic properties, and molecular electrostatic potential surface maps of R134a, R1234ze(E), and R450A used in automotive air conditioning systems were calculated using Density Functional Theory (DFT) with the Gaussian software package. The computational results were then correlated with thermodynamic performance indicators to explain the observed differences among the refrigerants. It was found that R1234ze(E) exhibited the highest COP and exergy efficiency, indicating superior thermodynamic performance, while R450A showed the highest exergy destruction, highlighting potential trade-offs between efficiency and environmental sustainability. These findings provide valuable insights for selecting environmentally friendly and efficient refrigerants in automotive applications.