In February 2021
Answer to Question #134600 in Mechanical Engineering for Afrasyab
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.
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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