Akademik Veri Yönetim Sistemi
International Communications in Heat and Mass Transfer, cilt.176, 2026 (SCI-Expanded, Scopus)
This study is motivated by the increasing demand for energy-efficient and environmentally benign refrigeration systems operating at low temperature levels. In this context, cascade refrigeration cycles (CRCs) combined with low-GWP refrigerants and nanoparticle-enhanced working fluids represent a promising solution to reduce energy consumption and environmental impact. This study evaluates the thermodynamic performance of a cascade refrigeration cycle (CRC) incorporating that copper oxide (CuO) and graphene nanoplatelet (GNP) nanoparticles and operating with various refrigerants. The analysis, which was conducted using Engineering Equation Solver (EES), concentrates on crucial performance indicators such as coefficient of performance (COP), exergy efficiency, exergy destruction, and compressor power consumption. The findings suggest that while R41 was utilized in the low temperature cycle (LTC), thermodynamic analysis was conducted with various refrigerants in the high temperature cycle (HTC). In the case of the refrigerants under consideration, it was found that R1234ze demonstrated optimal performance, while R454C exhibited the least efficient performance. While the R1234ze refrigerant performs best, it is about 13% more COP than the R454C, which performs poorest. Especially with the addition of 0.1% CuO, this difference has increased to around 23%. The values of R1234yf and R513A, as well as R1234ze and R515A, were found to be similar. As R1234yf and R1234ze have a lower Global Warming Potential (GWP), experimental studies can be conducted to evaluate the interchangeability of these fluids. In addition to these findings, it was established that CuO nanoparticles exhibit a greater capacity to enhance efficiency in comparison to GNP nanoparticles.