A turbine operates adiabatically with superheated steam entering at T1 and P1 with a mass flow rate m. The exhaust pressure is P2 and the turbine efficiency is ή. For OIK of the following sets of operating conditions, determine the power output of the turbine and the enthalpy and entropy of the exhaust steam.
(a) T1 = 450 C, P1 = 8,000 kPa, m = 80 kg s-1. P2 = 30 kPa. ή = 0.80.
(b) T1 = 550oC P1, = 9.000 kPa, m = 90 kg s-1 P2 = 20 kPa, ή = 0.77.
(c) T1 = 600 C. P1 = 8.600 kPa, m = 70 kg s-1 P2 = 10 kPa. ή = 0.82.
(d) T1 = 400-C, P1 = 7,000 kpa, m = 65 kg s-1 P2 = 50 kPa, ή = 0,75.
(e) T1 = 200 C. P1 = 1.400 kPa, m = 50 kg s-1. P2 = 200 kPa, ή = 0.75,
(f) T1 = 900CF), P1 = l100 (psia). m = 150(lbm)(s)-1 P2 = 2(psia) ή = 0.80.
(g) T1 = 800( F), P1 = l000 (psia). m = I00(Ibm)(s)-1, P2 = 4(psia), ή = 0.75