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Q7. Air enters an open cycle gas turbine plant at a pressure and temperature of 1.013 bar and 27°C respectively and is compressed to 12.5 bar. The hot gases Leave the combustion chamber and enter the turbine at a pressure of 12.5 bar and a temperature of 827°C expanding in two stages of equal pressure ratio to the initial pressure. The gases are reheated to 827°C between the turbine stages. The isentroic efficiency of the compressor is 0.8. The isentropic efficiency of each turbine stage is 0.85. The mass flow rate of fuel may be ignored. Sketch the cycle on a Temperature Specific entropy diagram. Calculate EACH of the following

(i) The compressor outlet temperature

(ii) The second stage turbine outlet temperature

(iii) The work ratio.

NOTE: For Air g = 1.4 and  = 1.005 kJ/kgK

For the Hot Gas g = 1.33 and  = 1.15 kJ/kgK