A gas-turbine power plant operates on the regenerative Brayton cycle between the pressure limits of 100 and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s  and leaves at 260°C. It is then heated in a regenerator to  400°C by the hot combustion gases leaving the turbine. A diesel fuel with a heating value of  42,000  kJ/kg  is  burned in the combustion chamber with a combustion efficiency of 97 percent. The combustion gases leave the combustion chamber at 871°C and enter  the  turbine  whose isentropic efficiency is 85 percent. Treating combustion gases as air and using constant specific heats at 500°C, The properties of air at 500ºC = 773 K are cp = 1.093 kJ/kg·K, cv = 0.806 kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.357 d) the net power output  (e) he back work ratio (f)  the  thermal efficiency

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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A gas-turbine power plant operates on the regenerative Brayton cycle between the pressure limits of 100 and 700 kPa. Air enters the compressor at 30°C at a rate of 12.6 kg/s  and leaves at 260°C. It is then heated in a regenerator to  400°C by the hot combustion gases leaving the turbine. A diesel fuel with a heating value of  42,000  kJ/kg  is  burned in the combustion chamber with a combustion efficiency of 97 percent. The combustion gases leave the combustion chamber at 871°C and enter  the  turbine  whose isentropic efficiency is 85 percent. Treating combustion gases as air and using constant specific heats at 500°C, The properties of air at 500ºC = 773 K are cp = 1.093 kJ/kg·K, cv = 0.806 kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.357

d) the net power output 

(e) he back work ratio

(f)  the  thermal efficiency 

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