Comparative energy and exergy analysis and optimisation study on the supercritical CO2 recompression power cycle

International Journal of Exergy

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 (ηc = 85%, ηt = 90%) have higher cycle thermal efficiency than RCBCs with lower turbomachinery efficiencies (ηc = 75%, ηt = 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.

Keywords

Brayton cycle Isentropic process Gas compressor Turbomachinery Exergy Thermal efficiency Exergy efficiency Turbine Thermodynamic cycle Thermodynamics Environmental science Combined cycle Supercritical fluid Efficient energy use Ram air turbine Working fluid Chemistry Physics Mechanics Engineering Electrical engineering

Subject Areas

Thermodynamic and Exergetic Analyses of Power and Cooling Systems ·Mechanical Engineering ·Physical Sciences

Phase Equilibria and Thermodynamics ·Biomedical Engineering ·Physical Sciences

Refrigeration and Air Conditioning Technologies ·Mechanical Engineering ·Physical Sciences

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Affordable and clean energy 88%

Comparative energy and exergy analysis and optimisation study on the supercritical CO2 recompression power cycle

Abstract

Keywords

Subject Areas

OpenAlex SDG Match

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