Parametric analysis of heat exchanger design in a techno-economic optimization of a sCO2 system
The investigation of favorable operating conditions for sCO2 cycles for waste heat recovery is a process that requires a proper analysis of operating parameters, component design, and economic performance. In this aspect, examining the heat exchanger has preponderant significance. In this study, as part of the Carbosola project, a thermoeconomic multiobjective optimization of the sCO2 cycle is analyzed based on a onedimensional design of the heat exchangers, focusing on the recuperator. The main objective is to investigate the effect of the non-linearity of the CO2 properties in the heat exchanger geometry and on the cycle performance. The results highlight the significance of the one-dimensional investigations in the optimization process, while sensitivity analyses indicate the recuperator as key equipment for the optimal cycle operation. Furthermore, the examination reveals the influence of the CO2 properties characteristics at different operating ranges and its effects on the system's equipment design and thermo-economic performance. Finally, the results indicate a prominent potential of the sCO2 Preheating architecture for heat recovery from gas turbines.
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