exergetic, exergoeconomic, and exergoenvironmental assessments and optimization of a novel solar cascade organic rankine cycle-assisted hydrogen liquefaction

In this research, a combination of cascade organic rankine cycle (corc) and ejector refrigeration loops incorporated with the concentrating linear fresnel solar collector (lfsc) is proposed as a pre-cooling system to reduce electricity consumption in the mixed refrigerant (mr) hydrogen liquefaction process. exergetic, exergoeconomic, and exergoenvironmental analyses of the system over a year and on particular days were conducted in detail. moreover, the annual thermodynamic, economic, and environmental impact (ei) performances of the proposed system were evaluated by varying the substantial design parameters. parametric study indicated that increasing the back pressure of a turbine in the low-temperature (lt) loop would improve all of the aforementioned system performances. meanwhile, bi-objective optimization based on non-dominated sorting genetic algorithm (nsga-ii) and linmap, topsis and shannon entropy decisionmakers were used to ascertain the optimum copex and economic/ei factors of the system. according to the results, copex was enhanced by 10% and the cost and ei per exergy unit of lh2 were reduced to 0.0309 $/mj and 1.361 pts/mj using the topsis method