A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1200 kPa

A gas-turbine power plant operates on the simple Brayton cycle between the pressure limits of 100 and 1200 kPa. The working fluid is air, which enters the compressor at 300K at a rate of 150 m3/min and leaves the turbine at 773K. Using variable specific heats for air and assuming a compressor isentropic efficiency of 82 percent and a turbine isentropic efficiency of 88 percent, determine:

(a) the net power output

(b) the back work ratio

(c) the thermal efficiency

 

In: Mechanical Engineering

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