Chapter 10.9, Problem 131FEP

Consider a steam power plant that operates on the regenerative Rankine cycle with one open feedwater heater. The enthalpy of the steam is 3374 kJ/kg at the turbine inlet, 2797 kJ/kg at the location of bleeding, and 2346 kJ/kg at the turbine exit. The net power output of the plant is 120 MW, and the fraction of steam bled off the turbine for regeneration is 0.172. If the pump work is negligible, the mass flow rate of steam at the turbine inlet is

1. (a)   117 kg/s
2. (b)   126 kg/s
3. (c)   219 kg/s
4. (d)   268 kg/s
5. (e)    679 kg/s