GasTurbineCyles - ME 201 Thermodynamics Gas Turbine Cycles...

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1 ME 201 Thermodynamics Gas Turbine Cycles 1. Gas Turbine Power Cycles All gas turbine power plants are based upon the ideal Brayton cycle shown below. Compressor Turbine Burner The three devices are Isentropic Compressor Constant Pressure Burner (fluid is heated) Isentropic Turbine In actual gas turbine power systems, three additional devices are often included to improve performance and efficiency of the system: regenerator, intercooler (along with compressor staging), and reheater (along with turbine staging). These are discussed below. Regenerator: The purpose of a regenerator is to use the energy that is being exhausted at the exit of the turbine to pre-heat the gas as it enters the burner. This significantly increases the efficiency of the gas turbine power plant. The performance of a regenerator is characterized by the effectiveness, which is given by h h h h h h h h in , cold in hot, in , cold out cold, in , cold in hot, out , hot in hot, reg - - = - - = ε Ideally, there is no pressure drop in the regenerator. The regenerator is position in the device as shown below.
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GasTurbineCyles - ME 201 Thermodynamics Gas Turbine Cycles...

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