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Q23. Air enters the compressor of a simple gas turbine plant at a pressure of 1 bar and a temperature of 300 K. It is compressed to 6 Bar with an isentropic efficiency of 85%. The hot gases leave the combustion chamber at a pressure of 6 bar and a temperature of 1200 K, the turbine exhaust at a pressure of 1 bar and a temperature of 810 K.

(a) Sketch the cycle on T-s diagram

(b) Determine EACH of the following

(i) The isentropic efficiency of the turbine

(ii) The network output per kg of gas

(iii) The thermal efficiency of the cycle.

Note: For air, g = 1.4 and Air. C_p= 1.005 kJ/kg K for hot gas in combustion chamber and turbine, g = 1.33 and Exh. C_p= 1.150 kJ/kg K