Classification of Gas Turbine Power Plant
Points : Classification of Gas Turbine, Open cycle gas turbine, Closed cycle gas turbine
Gas turbines might be mostly classified as:
i. Open Cycle Gas Turbine
ii. Closed Cycle Gas Turbine
i. Open Cycle Gas Turbine
Open cycle gas turbine, air is strained into compressor as of the atmosphere. Compressed air is
intense with directly flaming the fuel in air at stable pressure within the combustion chamber.
High pressure hot gases as of combustion chamber drive turbine with the power is develop as the
turbine shaft rotate. The gas turbines are not character starting. Starting motor take the
compressor till fuel is inject in the combustion chamber, one time the turbine starts fast speed
the starting motor is detached. Piece of power develop through the gas turbine (about 60%) is use
to drive compressor with the remain is use to drive a generator or other mechanism. In open cycle
the working fluid specifically air with the fuel has to be change constantly as they are exhausted
into atmosphere. Therefore the entire flow comes as of atmosphere with is return to the atmosphere,
thus it is call open cycle.
ii. Closed Cycle Gas Turbine
In Closed cycle the dense air as of the atmosphere is excited in air heater (heat exchanger). Heat
is added to air heater as of various outside sources (oil or coal) at stable pressure. High
pressure work fluids increase through turbine with power is developing. The exhaust work fluid is
chilled in a pre cooler before the similar fluid is sent into compressor again. Closed cycle gas
turbine the similar working fluid is constantly circulated. The fuel required for addition heat as
of an external source can several fuels range as of kerosene, to heavy oil with even peat and coal
slurry with no reducing efficiency.


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