Influence of working fluids R245fa and R1233zd(E)on the thermodynamic performance of organic Rankine cycle system
In order to investigate the thermodynamic performance of the conventional working fluid R245fa and the low GWP working fluid R1233zd(E)in a reheat organic Rankine cycle(ORC)system,the Engineer Equation Solver(EES)is used to establish a thermodynamic model of the system,the thermodynamic and exergy analysis are performed.The effects of the thermal and exergy efficiency of the system are analyzed under different operating parameters.The results show that the thermal efficiency of the system with R1233zd(E)increases by 12.85%and the exergy efficiency increases by 27.42%compared to the system with R245fa as the working fluid.The thermodynamic performance of the system can be further improved by adjusting the degree of overheat of the evaporator and the degree of overcooling of the condenser.
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