Thermodynamic evaluation and multi-objective optimization of molten carbonate fuel cell-supercritical CO2 Brayton cycle hybrid system

Examining the Fuzzy method results for example, in the first scenario, which doesn't consider power density, ecological function density and exergy destruction rate density meet their optimum values, 1.314 and 0.3864 kW/m2, respectively. However, energy efficiency falls by 10% compared to its maximum, which occurs in the third scenario (0.6676), where ecological function density isn't included, and power density drops by 25% compared to its own in the second scenario (2.2783 kW/m2), where energy efficiency is not. This indicates the strong confliction between the objective functions and also the necessity of this kind of analysis. However, the first scenario would roughly provide the best condition for the system if one wanted all the objective functions to be optimum all together.