%0 Journal Article
%T Simulation Modelling and Techno-Economics of Supercritical Carbon Dioxide Recompression Closed Brayton Cycle
%A Ken Amaale Atinga
%J Energy and Power Engineering
%P 325-344
%@ 1947-3818
%D 2024
%I Scientific Research Publishing
%R 10.4236/epe.2024.1610016
%X In recent years, there has been global interest in meeting targets relating to energy affordability and security while taking into account greenhouse gas emissions. This has heightened major interest in potential investigations into the use of supercritical carbon dioxide (sCO<sub>2</sub>) power cycles. Climate change mitigation is the ultimate driver for this increased interest; other relevant issues include the potential for high cycle efficiency and a circular economy. In this study, a 25 MW<sub>e</sub> recompression closed Brayton cycle (RCBC) has been assessed, and sCO<sub>2</sub> has been proposed as the working fluid for the power plant. The methodology used in this research work comprises thermodynamic and techno-economic analysis for the prospective commercialization of this sCO<sub>2</sub> power cycle. An evaluated estimation of capital expenditure, operational expenditure, and cost of electricity has been considered in this study. The ASPEN Plus simulation results have been compared with theoretical and mathematical calculations to assess the performance of the compressors, turbine, and heat exchangers. The results thus reveal that the cycle efficiency for this prospective sCO<sub>2</sub> recompression closed Brayton cycle increases (39% - 53.6%) as the temperature progressively increases from 550&#730;C to 900&#730;C. Data from the Aspen simulation model was used to aid the cost function calculations to estimate the total capital investment cost of the plant. Also, the techno-economic results have shown less cost for purchasing equipment due to fewer components being required for the cycle configuration as compared to the conventional steam power plant.
%K Supercritical Carbon Dioxide (sCO<sub>2</sub>)
%K Closed Brayton Cycle
%K Techno-Economics
%K Simulation
%K Capital Expenditure
%K Gas Turbine
%K Thermodynamic
%K Equipment Cost
%K Optimization and Sensitivity
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=136493