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The aim is to develop and optimize a hybrid energy system coupling a recompression Brayton cycle and an Organic Rankine Cycle.

March 14, 2026EnergiesOpen Access

Energy, Exergy, and Environmental (3E) Analysis and Multi-Objective Optimization of a Recompression Brayton–Organic Rankine Cycle Integrated with a Central Tower Solar Receiver

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The aim is to develop and optimize a hybrid energy system coupling a recompression Brayton cycle and an Organic Rankine Cycle.
Coupled the recompression sCO2 Brayton cycle with an Organic Rankine Cycle and a central-tower particle receiver.
Performed energy, exergy, and environmental analyses with two optimization scenarios.
Identified Pareto points to improve exergy efficiency and reduce fuel flow.
Achieved exergy efficiency of 0.65 during winter and reduced fuel flow to 15 kg/s.
Overall thermal efficiency reached 0.50 with emissions of 2520 t CO2 and 2850 kg NOx.
Increased ORC efficiency by 6.8–12.66% and Brayton efficiency by 33.4–33.5%, while reducing daily CO2 and NOx emissions by 52%.

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Optimizes a hybrid energy system, enhancing efficiency and reducing emissions in a solar-powered environment.

Moctezuma-Hernandez et al. (2026) studied this question.

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