Determination of performance of organic rankine cycle with regenerative recuperator designed using next-generation and zeotropic fluids

In this thesis study, the performance of the Organic Rankine Cycle designed using new generation and zeotropic fluids was determined. The performance of the Classical Organic Rankine Cycle and the Organic Rankine Cycle with Regenerative Recuperator was compared in terms of fluid type. In this comparison, the effect of open feed water and recuperator on system performance values was observed. Since the global warming potential (GWP) value of pure organic fluids is high, new generation R1216, R1234ze(E), R1234yf, R1243zf fluids with GWP values close to zero were used in the designed configurations. In addition to its good environmental effects, energy and exergy performance have also been determined. In addition, zeotropic fluids formed by mixing new generation fluids and pure fluids in certain mass ratios are R448A (26% R32, 26% R125, 20% R1234yf, 21% R134a, 7% R1234zee), R449A (24.3% R32, 24%, 7 R125, 25.3% R1234yf, 25.7% R134a), R450A(42% R134a, 58% R1234zee), R454C(21.5% R32, 78.5% R1234yf), R513A(44% R1234yf, 56% R134a) performance was examined through thermal efficiency, exergy efficiency, net work and pump consumption parameters. In addition, the performance of the fluids under different critical pressure coefficients of 0.8 and 0.9 was determined. As a result of this study, the difference between open feed water and recuperator was clearly seen on the system in the comparison of ORÇ, Rr-ORÇ. Among the determined fluids, R1234ze(E) was determined as the best performing fluid with Rp of 0.9, 13.26% thermal efficiency, 52.93% exergy efficiency, 58.08 kJ/kg net work and 8.64 kJ/kg pump consumption.