Comparative energy and exergy analysis and optimisation study on the supercritical CO₂ recompression power cycle
by Emrah Gumus; Veysi Bashan
International Journal of Exergy (IJEX), Vol. 32, No. 2, 2020

Abstract: The current study aims at optimisation and comparing the recuperative s-CO₂ cycle with the re-compression s-CO₂ cycle in case of changes in turbine and compressor isentropic efficiency and TITs. Below 317°C the TIT recuperated Brayton cycle (RBC) has a higher cycle efficiency than RCBC for the case where compressor efficiency is 75% and turbine efficiency is 80%. RBCs with having higher turbomachinery efficiencies (η_c = 85%, η_t = 90%) have higher cycle thermal efficiency than RCBCs with lower turbomachinery efficiencies (η_c = 75%, η_t = 80%). These results will remedy the gap in the literature on information for selecting the appropriate cycle for various purposes under certain thermodynamic inlet conditions.

Online publication date: Fri, 03-Jul-2020

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