Performance Evaluation of a Hybrid Ammonia-Water and Transcritical CO₂ Combined Power Cycle for Enhanced Energy Efficiency

The rising global energy demand and the need to cut carbon emissions call for more efficient and sustainable power generation technologies. Traditional thermal cycles like the Rankine cycle face energy losses, necessitating innovative configurations. This study examines a hybrid ammonia-water and transcritical CO₂ power cycle that leverages the strengths of both working fluids for better efficiency. The ammonia-water (Kalina) cycle enhances heat recovery with its variable boiling point, while the sCO₂ cycle offers superior thermal properties and lower compression work. By integrating these cycles, the system optimally utilizes waste heat, reduces energy losses, and boosts power output. A thermodynamic analysis assesses thermal efficiency, exergy destruction, and environmental benefits, with a focus on potential integration with solar and geothermal energy for enhanced sustainability. The results highlight the hybrid cycle’s capability to improve energy conversion and minimize environmental impact.