Comparative Analysis of an Organic Rankine Cycle for Waste Cogeneration Plants

Abstract

For low, moderate, and high-temperature Organic Rankine Cycle (ORC) used in waste heat recovery, it is necessary to select a fluid with a high working temperature. In plastic waste power and heat plants, the ORC is used for cogeneration. The analysis of the cycle has been carried out considering the evaporation temperature and condensation temperature of pure ecologic HFC working refrigerants R134a, R245fa, R227ea, R600a, R152a, and R123 CFC fluid. Based on the Helmholtz thermodynamic mathematical models for working fluids, the effects of design parameters, including that of turbine inlet pressures, mass flow rates of working fluids, and outlet steam fractions of boiler on the system performance are investigated from the view of both thermodynamics efficiency and energetic efficiency.