A two stage compression with intercooling in between stages and a single stage turbine with regeneration is employed in an open cycle gas turbine plant. Air at 1 bar and 15°C enters the compressor and the maximum pressure ratio is 5 and the maximum temperature in the cycle is 800°C. The rate of air flow through the cycle is 250kg/sec and the calorific value of the fuel used is 42 MJ/kg. The isentropic efficiencies of both the compressors is 0.8 and the effectiveness of the regenerator is 0.7, and the isentropic efficiency of the turbine is 0.9. The combustion efficiency is 0.95, the mechanical efficiency is 0.96 and the generator efficiency is 0.75. Take CP of air = 1.005 kJ/kg K and g = 1.4 and for gases CP = 1.08 kJ/kg K and g = 1.33.
Assuming perfect intercooling and neglecting pressure and heat losses, determine
(i) the air fuel ratio
(ii) The cycle efficiency
(iii) The power supplied by the plant
(iv) the specific fuel consumption and the fuel consumption per hour.