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PART 1Executive Overview
1Definition

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.

Category
Fossil
Best use
Peaker / transition fuel
Stage
NOW
2Problem It Solves

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.

3Lifecycle / Journey Stage
early commercial
PART 2Technical & Manufacturing
4How It Works

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.

5Materials Used
6Manufacturing / Creation Process

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.

7Build Process

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.

PART 3Market & Industry
9Companies Involved
GE VernovaSiemens EnergyMitsubishi

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10Estimated Costs

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11Case Studies

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PART 4Academic References
12Scientific Papers / White Papers

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13Patents

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14Glossary
Combined-cycle gas turbines (CCGT)
A type of power plant that uses natural gas to produce electricity through a combination of a gas turbine and a steam turbine.
Heat recovery steam generator (HRSG)
A device in CCGT systems that recovers heat from the exhaust gases of the gas turbine to generate steam for a second turbine, increasing overall efficiency.
Peaker plant
A power generation facility designed to operate during peak demand periods when electricity prices are typically higher.
15References

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Related Technologies

Source: curated technology intelligence stream with tracked references.