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Abstract
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This study presents a new arrangement of the reheating Allam cycle and investigates the efficacies of key parameters on the net specific work and thermal and exergy efficiencies of the proposed cycle. The performance of the optimized reheating Allam cycle is compared to several oxy-combustion cycles, and the results show that the inlet temperature of the low-pressure turbine, followed by the inlet temperature of the high-pressure turbine, has a remarkable efficacy on the thermodynamic performance of the reheating Allam cycle. In contrast, the minimum temperature of the proposed system has the lowest impact on its performance. The study identifies that the low-pressure combustion chamber accounts for the biggest share of the exergy destruction of the proposed reheating Allam cycle, representing 20.68% of the overall input exergy. The net specific work of the optimized reheating Allam cycle is evaluated at up to 596.3 kJ/kg, with thermal and exergy efficiencies obtained at 52.37% and 46.70%, respectively. These values indicate significant performance improvements compared to other oxy-combustion cycles. This study supplies valuable perceptions into the design of the reheating Allam cycle and suggests that this configuration has the potential to be a promising alternative to other cycles in terms of its high efficiency and low environmental impact.
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