Exergy analysis and optimization of Rankine power and ejector refrigeration combined cycle

This article proposes a combined cycle which consists of the hybrid Rankine power cycle and Ejector refrigeration cycle. This cycle is capable of producing thermal and refrigeration powers simultaneously. The proposed cycle can function through the heat exhausting from gas turbines, energy dissipations of factories, solar energy, or geothermal energy. In this research, Exergy analysis is used to improve the cycle; and Parametric analysis is used to investigate the effects of thermodynamic characteristics on the performance of the cycle. The results indicate that the most exergy dissipations occur as a result of irreversibilities and that ejectors have a significant role in such irrevesibilities. It has also been noted that factors such as the inlet pressure to turbine, turbine outlet pressure, and the temperature of condenser and evaporator have a considerable effect on turbine's output power and exergy efficiency of the cycle. The optimized exergy efficiency is 24.52% under the given condition.