 Gas Turbine

Subject Engineering Mechanical Engineering

Question

A gas turbine cycle with reheat ad intercooling is used to provide power for a business park.
The inlet conditions to the cycle are 101.325 kPa and 300 K, and the pressure ratio for each compressor is 5.
The inlet temperature to the high pressure turbine is 1800 K.
Assuming that the compressor and turbine are ideal, that frictional pressure losses are negligible, that the intercooler and reheater are at the same pressure, that the exit temperature of the reheater is equal to the inlet temperature to the high pressure turbine, and that the exit temperature of the intercooler is equal to the inlet temperature of the low pressure compressor:
a. Calculate enthalpy and entropy at all state points of the cycle.
b. Calculate the total compressor work, per unit mass.
c. Calculate the total turbine work, per unit mass.
d. Calculate the efficiency of the cycle.
e. If the isentropic efficiencies of each compressor are now 81% and those of each turbine are 88%, what is the new thermal efficiency?

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