Combined-cycle gas turbines (CCGT) are power generation systems that utilize natural gas to produce electricity. They consist of one or more gas turbines and a steam turbine, where the exhaust heat from the gas turbine is used to generate additional electricity in a second cycle.
CCGTs address the need for flexible power generation capacity that can quickly respond to changes in demand or serve as backup during peak usage periods.
Natural gas is combusted in a gas turbine, which drives a generator to produce electricity. The hot exhaust gases from this process are then directed into a heat recovery steam generator (HRSG), where they are used to boil water and create steam. This steam is fed into a second turbine that also drives a generator, producing additional electricity.
Manufacturing CCGT systems involves the assembly of gas turbines and steam turbines from components manufactured by various suppliers. The process includes detailed engineering, testing, and integration steps.
The build process for a CCGT plant typically starts with site preparation, followed by the installation of the main equipment (turbines, generators, HRSG), electrical systems, and control systems. Commissioning involves testing all components to ensure they operate efficiently together.
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