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The unit must apply 200kw electrical load calculate the

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Reference no: EM13633190

The Following data apply to the auxiliary power unit (APU) on the Boeing 777 (single shaft unit, driving seperate load compressor and generator):

Load Compressor

Mass flow: 3.5 kg/s

Pressure Ratio: 3.65

Isentropic efficiency: 0.88

Gas Turbine

Pressure Ratio: 12.0

Compressor isentropic efficiency 0.84

turbine inlet temperature: 1390k

turbine isentropic efficiency: 0.87

Combustion delP/compressor delivery pressure: 0.05

Turbine exhaust pressure: 1.04 bar

When operating at 35 degrees celsius and 1.01 bar at take off conditions, the unit must apply 200kW electrical load. Calculate the airflow required for the gas turbine and the specific fuel consumption.

Reference no: EM13633190

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