Economic and Environmental Comparison of Various Fluids in a Carbon Capture System Using the Brayton Cycle with Recompression and Recuperation Cycles

Document Type : Original Article

Authors

1 Master’s student in Energy Systems, Faculty of Energy and Sustainable Resources, University of Tehran, Tehran, Iran

2 Associate Professor of Energy Systems Group, Faculty of Energy and Sustainable Resources, University of Tehran, Tehran, Iran

10.22059/ses.2024.383314.1102

Abstract

Population growth, especially in developing and less developed countries, leads to increased energy demand, particularly for electricity. As the need for electricity rises, so does the consumption of primary energy sources, especially fossil fuels. However, this trend poses significant risks due to global warming and its impact on climate change. Additionally, considering the carbon footprint taxes projected for the coming years, addressing this issue becomes even more critical. In this research, the objective is to identify the optimal working fluid among four candidates: Methane, Methane Flue Gas, Syngas, and Syngas Flue Gas. The study evaluates their economic and environmental advantages. Furthermore, it investigates how the carbon mass fraction in each working fluid affects economic and environmental parameters. As part of this analysis, a combined cycle integrating a Brayton cycle with a solar-heliostat cycle is proposed. In this configuration, solar energy replaces the boiler to provide heat for the turbine’s working fluid. The goal is to achieve cost reduction and environmental sustainability.

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