Answer to Question #134600 in Mechanical Engineering for Afrasyab

Question #134600

Air enters the compressor of a gas turbine at 100 kPa and 25°C. For a pressure ratio of 5 and a maximum temperature of 850°C determine the back work ratio and the thermal efficiency using the Brayton

cycle.



1
Expert's answer
2020-09-23T14:55:10-0400


Given information

Initial pressure,

Initial temperature,

Compression ratio, r =5

Turbine inlet temperature,

At temperature and the pressure

At

By interpolating

At temperature

At =36.342

By interpolation

We know the thermal efficiency of the cycle    

η=34.4 %


The back work ratio

bwr = 41.44 %



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