Gas Turbine Power Plant.

General

A generating station which employs gas turbine as the prime mover for the generation of electrical energy is known as a gas turbine power plant.

In a gas turbine power plant,air is used as the working field.The air is compressed by the compressor and is led to the combustion chamber where heat is added to air,thus raising its temperature.Heat is added to the compressed air either by burning fuel in the chamber or by the use of air heaters.The hot and high pressure air from the combustion chamber is then passed to the gas turbine where it expands and does the mechanical work.The gas turbine drives the alternator which converts mechanical energy into electrical energy.

It may be mentioned here that compressor,gas turbine and the alternator are mounted on the same shaft so that a  part of mechanical power of the turbine can be utilized for the operation of the compressor.Gas turbine power plants are being used as standby plants for hydro-electric stations as a starting plant for driving auxiliaries in power plants etc.

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