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A gas turbine power plant operates on a Brayton cycles has a pressure ratio of 7....

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Mechanical Engineering

A gas turbine power plant operates on a Brayton cycleshas a pressure ratio of 7. Air enters the
compressor at 300 K. The energy in the form of heat is transferredto the air in the amount of 950
kJ/kg. Using a variable specific heat for air and assuming thecompressor isentropic efficiency is
83 percent and turbine isentropic efficiency is 85 percent.Determine the followings:
(i) The highest temperature in the cycle [5 marks]
(ii) The net work output, in kJ/kg [10 marks]
(iii) The back work ratio [5 marks]
(iv) The thermal efficiency. [5 marks]
(v) Show the cycle on T-s diagram [5 marks]

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