analytical models

This study investigates the application of Organic Rankine Cycle (ORC) technology for recovering waste energy from the intercooler in the Siemens SGT-A65 gas turbine. ORC demonstrates high energy recovery potential for mid-grade waste heat within the 100–200°C range, which aligns with the temperature range available from the intercooler. Using EES software for thermodynamic modeling and analysis to evaluate various working fluids and operating conditions, comparing the performance of the standard gas turbine cycle with modified configurations. Findings indicate that ORC integration significantly enhances energy recovery efficiency, achieving an improvement of up to 6.65% in overall thermal performance beside achieving a decrement of 3.34 $/MWh compared to stock LCOE Furthermore, environmental analysis reveals a 15.6% reduction in carbon emissions (0.35 kg CO₂/kWh), contributing to a cleaner system. Economic feasibility is also examined, emphasizing the potential for sustainable energy management. Recommendations focus on optimizing performance and minimizing environmental impact to encourage broader adoption.