Technology
Open-Cycle Gas Turbines (OCGTs) are natural gas-fired power plants that operate on a simple cycle, where fuel is burned in a combustion chamber to create hot gases that drive a turbine connected to an electricity generator. Unlike combined-cycle plants that capture waste heat for additional power generation, OCGTs release exhaust gases directly to the atmosphere, making them less efficient but more flexible for rapid startup and shutdown. In renewable energy systems, OCGTs serve as important backup or peaking power sources that can quickly ramp up when solar and wind generation is insufficient to meet electricity demand. Their ability to start within minutes makes them valuable for grid stability and balancing the intermittent nature of renewable energy sources. While OCGTs have higher operating costs and emissions per unit of electricity compared to combined-cycle plants, their flexibility and quick response times make them essential for maintaining grid reliability as renewable energy penetration increases. Many power systems rely on OCGTs as a bridge technology while battery storage and other grid flexibility solutions are deployed to support higher levels of renewable energy integration.