Performance analysis of the different Organic Rankine Cycles (ORCs) using dry fluids

This paper presents the first and second laws of thermodynamics analysis for organic Rankine cycles (ORCs), using dry organic fluids as the working fluids. The dry organic fluids for this study were R227ea, RC318, R236fa, Isobutane, R600a, R245fa, HFE7000, R123 and R113. Effects of the operating parameters such as turbine inlet temperature and pressure on the thermal efficiency, exergy destruction rate and second-law efficiency were evaluated. The ORCs studied in this paper were regenerative ORC with IHE, regenerative ORC, ORC with IHE and basic ORC.

Keywords: organic dry fluids, ORC, organic Rankine cycles, IHE, internal heat exchangers, second law, thermodynamics, exergy destruction rate