A 1×1 combined cycle power plant refers to a specific configuration where one gas turbine
is coupled with one steam turbine to generate electricity.
Brief presentation of the main components:
- Gas Turbine (GT):
Function: The gas turbine is the primary component that converts fuel into
mechanical energy. It operates on the principle of burning a gaseous fuel
(natural gas, for example) to drive a turbine.
Components: Includes a compressor, combustion chamber, and a turbine.
The compressor compresses incoming air, the combustion chamber ignites
the fuel-air mixture, and the turbine extracts energy from the expanding
gases. - Heat Recovery Steam Generator (HRSG):
Function: The HRSG captures the waste heat from the gas turbine exhaust
and uses it to produce steam. This enhances overall efficiency by utilizing
energy that would otherwise be lost.
Components: Typically consists of a series of heat exchangers to transfer
heat from the gas turbine exhaust to water, producing high-pressure and
low-pressure steam. - Steam Turbine (ST):
Function: The steam turbine converts the thermal energy in steam into
mechanical energy. It operates by expanding high-pressure steam through
a series of blades to drive a turbine.
Components: Comprises a high-pressure turbine and a low-pressure
turbine. The high-pressure steam from the HRSG is expanded in the high-
pressure turbine, and the exhaust steam continues to the low-pressure
turbine. - Generator:
Function: The generator is responsible for converting the mechanical
energy from the turbines into electrical energy. It operates on the principle
of electromagnetic induction.
Components: Includes a rotor (connected to the turbine) and a stator
(stationary part). As the rotor spins, it induces a flow of electric current in
the stator windings, generating electricity. - Cooling System:
Function: To maintain the optimal operating temperature of various
components, a cooling system is employed. This ensures the efficient and
safe operation of the turbines and other critical equipment.
Components: May include air coolers, water cooling systems, and other
heat exchange mechanisms. - Control System:
Function: The control system monitors and regulates the operation of the
entire power plant to optimize efficiency, respond to demand fluctuations,
and ensure safe and stable operation.
Components: Comprises sensors, actuators, and a central control unit that
manages the operation of the gas and steam turbines, as well as other
auxiliary systems.