Assessment of novel Kalina power system through exergoenvironmental perspective

A novel power generation system suitable to recover waste heat from a renewable source at medium temperature level is investigated in the present work. In a regenerative system, saturated vapour is supplied to one of the heat exchangers by a secondary solar collector, which raises the temperature of the boiler as a whole. The main advantage of this method is the reduction in irreversibility in the mixing chamber M3, which encourages a higher flow rate to the turbine. Preheating the circulating solution and completely evaporating the basic stream are used to achieve this. The performance of the system is investigated in energy aspects along with detailed exergy analysis. Environmental impact as a result of the working conditions is essential to propose the optimum decision variables. Exergy analysis in both conventional and advanced methods proposes the system components which need improvements in themselves and associated with other components more properly. Exergoenvironmental analysis using the Life cycle assessment method is examined in the system under the hot sink conditions. Exergy analysis reveals that the component with a high source will yield more losses resulting in higher irreversibility. Hence, turbine and heat exchanger 4 (HE4) need investigation in improving the system's performance. Exergoenvironmental investigation suggests that the highest impact results same components identified by the advanced exergy analysis. Exergoenvironmental analysis on the proposed Kalina power generation system is carried out under hot sink conditions. The exergy destruction and destruction cost rate of 29.23 kW and 0.478 $ h -1 at turbine inlet conditions of 185 °C and 45 bar. The exergoenvironmental factor fb and the relative difference rb reveal that the components with high environmental impact have to be minimized. Turbine and HE4 are the components resulting in higher total exergy and devise related impact on the environment.