Chemical Process Design and Integration by Robin Smith chapter 23 exercise

7. The following data are given for a gas turbine. nGT MEX CP.EX Power generation W 15 MW Power efficiency 32.5% Exhaust flow 58.32 kg.s- Exhaust temperature 488C Exhaust heat capacity 1.1 kJ.kg-K-1 Stack temperature TSTACK 100C a. Calculate the fuel consumption QFUEL- b. Assuming 72% of the heat available in the exhaust can be recovered for steam generation, how much steam (QSTEAM) can be generated from an unfired HRSG in MW? What is the cogeneration efficiency Ncogen for the system of gas turbine and HRSG? = c. With supplementary firing (Tsf = 800C), calculate the C fuel consumption QSF for the supplementary firing, available heat from the exhaust Qex and steam generation for the same HRSG with an 83% efficiency. d. Calculate the power generation efficiency npower and cogeneration efficiency n coGEN for the system of gas turbine and HRSG with supplementary firing. Does supplementary firing improve npower or nogen