Problem#9.1:Calculating power output, cycle efficiency and work ratio of Open-cycle gas turbine unit

Book: Applied Thermodynamics by T.D Eastop & McConkey, Chapter # 09: Gas Turbine Cycles Problem # 9.1: A gas turbine has an overall pressure ratio of 5 & a maximum cycle temperature of 550 C. The turbine drives the compressor and an electric generator, the mechanical efficiency of the drive being 97%. The ambient temperature is 20 C & the air enters the compressor at the rate of 15 kg/s; the isentropic efficiencies of the compressor & the turbine are 80 & 83%. Neglecting changes in Kinetic energy, the mass flow rate of fuel, & all pressure losses, calculates: (i) The power output; (ii) The cycle efficiency; (iii) The work ratio.