Air enters the compressor of a simple gas turbine power

Chapter 13, Problem 13.75

(choose chapter or problem)

Air enters the compressor of a simple gas turbine power plant at \(70^{\circ} \mathrm{F}\), 1 atm, is compressed adiabatically to \(40 \mathrm{lbf} / \mathrm{in} .^{2}\), and then enters the combustion chamber where it burns completely with propane gas (C3H8) entering at \(77^{\circ} \mathrm{F}\), \(40 \mathrm{lbf} / \mathrm{in} .^{2}\)and a molar flow rate of 1.7 lbmol/h. The combustion products at \(1340^{\circ} \mathrm{F}\), \(40 \mathrm{lbf} / \mathrm{in} .^{2}\) enter the turbine and expand adiabatically to a pressure of 1 atm. The isentropic compressor efficiency is 83.3% and the isentropic turbine efficiency is 90%. Determine at steady state

(a) the percent of theoretical air required.

(b) the net power developed, in horsepower.