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MessagePosté le: Mar 11 Oct - 15:44 (2016)    Sujet du message: Gas Turbine Power Generation Pdf Download Répondre en citant




Gas Turbine Power Generation Pdf Download > bit.ly/2e3DaTo

























































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Examples are applications delivering 600 MW or more from a 400 MW gas turbine coupled to a 200 MW steam turbine in a co-generating installation. Simple Cycle Turbines A gas turbine consumes considerable amounts of power just to drive its compressor. Gas Turbine Power Plants . Gas turbine engines derive their power from burning fuel in a combustion chamber and using the fast flowing combustion gases to drive a turbine in much the same way as the high pressure steam drives a steam turbine. They do however find use in the major electricity grids in peak shaving applications to provide emergency peak power. Gas turbines have a very high power to weight ratio and are lighter and smaller than internal combustion engines of the same power. Such installations are not normally used for base load electricity generation, but for bringing power to remote sites such as oil and gas fields. The air turbine (compressor) draws in air, compresses it and feeds it at high pressure into the combustion chamber increasing the intensity of the burning flame. Although increasing the firing temperature increases the output power at a given pressure ratio, there is also a sacrifice of efficiency due to the increase in losses due to the cooling air required to maintain the turbine components at reasonable working temperatures. Uncontrolled runaway is prevented by controls on the fuel supply line which limit the amount of fuel fed to the turbine thus limiting its speed.

In simple cycle applications, pressure ratio increases translate into efficiency gains at a given firing temperature, but there is a limit since increasing the pressure ratio means that more energy will be consumed by the compressor. They can be adapted to use almost any flammable gas or light distillate petroleum products such as gasoline (petrol), diesel and kerosene (paraffin) which happen to be available locally, though natural gas is the most commonly used fuel. Turbine Configurations. Consequently simple cycle turbine efficiencies are quite low. Combined Cycle Turbines It is however possible to recover energy from the waste heat of simple cycle systems by using the exhaust gases in a hybrid system to raise steam to drive a steam turbine electricity generating set . One further advantage of gas turbines is their fuel flexibility. One major difference however is that the gas turbine has a second turbine acting as an air compressor mounted on the same shaft.

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