A comprehensive exergoeconomic analysis of absorption power and cooling cogeneration cycles based on Kalina, Part 2: Parametric study and optimization

A comprehensive exergoeconomic comparison of the absorption power and cooling cogeneration cycles based on Kalina is investigated in this study. After thermodynamic and exergoeconomic simulation of the double effect absorption refrigeration/Kalina as well as the first and second configurations of simple absorption refrigeration/Kalina cogeneration cycles, in this part, a widespread parametric study is done and the effects of the simultaneous variations of all studied cogeneration cycles operating parameters are examined on the thermodynamic and exergoeconomic performance of the cogeneration cycles. Also, for a better comparison of the considered cycles, the optimization is done and the considered cogeneration cycles are comprised regarding to five objective functions including the minimum unit cost of products, maximum energy and exergy efficiencies, minimum unit cost of produced exergy and minimum the sum of exergy destruction and capital investment cost rates. Finally, the payback period of the studied cogeneration cycles is calculated in all optimum states. The results show that the minimum unit cost of products for the first configuration of SAR/Kalina cycle is 16.46% and 9.27% less than the corresponding values for the DEAR/Kalina cycle and the second configuration of SAR/Kalina cycle, respectively. Also, the value of ĊD+Ż parameter for the first configuration of SAR/Kalina cogeneration cycle is 28.32% and 33.12% less than the corresponding values for the second configuration of SAR/Kalina cycle and DEAR/Kalina cycle, respectively. Also, in all optimum states except for the minimum unit cost of produced exergy, the first configuration of SAR/Kalina cycle has the lowest amount of payback period.