Effect of Steam Injection and Combined Cycle Technologies on Fuel Consumption and CO2 Emissions in Gas Turbine Power Plants

الملخص

This study investigates and compares the performance of a simple gas turbine plant with two advanced techniques: steam injection and combined cycle, focusing on fuel consumption and carbon dioxide (CO2) emissions. The results indicate that at an air compressor inlet temperature of 15 °C the specific fuel consumption (SFC) for the simple gas turbine is 230.44 kg/MWh. The steam injection technique significantly reduces SFC to 153.36 kg/MWh, achieving a 33.5% improvement, whereas the combined cycle reduces it to only 162.86 kg/MWh, with a 29.3% improvement. In terms of CO2 emissions, the simple cycle emits 632.16 kg/MWh, which is decreased to 420.71 kg/MWh with steam injection (33.4% reduction) and to 446.78 kg/MWh with the combined cycle (29.3% reduction). The results demonstrated that steam injection outperforms the combined cycle in fuel efficiency and emission reduction under moderate inlet temperatures, highlighting its potential for cleaner and more efficient power generation.