Section: Thermodynamics | Type: NAT | Marks: 2
A steam power plant operates on a simple ideal Rankine cycle. The condenser pressure is 10 kPa and the boiler pressure is 5 MPa. The steam enters the turbine at 600 ℃. Mass flow rate of the steam is 50 kg/s. Neglecting the pump work, the net power output of the plant is ____________ MW (rounded off to one decimal place). Use the following property data for water: At 10 kPa: hf = 191.81 kJ/kg, hfg = 2392.82 kJ/kg, hg = 2584.63 kJ/kg sf = 0.6492 kJ/kg-K, sfg = 7.5010 kJ/kg-K, sg = 8.1502 kJ/kg-K At 5 MPa and 600 ℃: h = 3666.47 kJ/kg, s = 7.2588 kJ/kg-K
Answer: 67.3 to 69.3