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The use of gas turbines for generating electricity dates back to 1939.
Industrial gas turbines are designed for stationary applications and have lower pressure ratios – typically up to 18:1.
To optimize the transfer of kinetic energy from the combustion gases to shaft rotation, gas turbines can have multiple compressor and turbine stages.
Because the compressor must reach a certain speed before the combustion process is continuous – or self-sustaining – initial momentum is imparted to the turbine rotor from an external motor, static frequency converter, or the generator itself.
Gas turbines can utilize a variety of fuels, including natural gas, fuel oils, and synthetic fuels.
Combustion occurs continuously in gas turbines, as opposed to reciprocating IC engines, in which combustion occurs intermittently. Gas turbines are comprised of three primary sections mounted on the same shaft: the compressor, the combustion chamber (or combustor) and the turbine.