Question

# A steam power plant based on Rankine cycle has net power of 200 MW. Saturated vapor enters the turbine at 10 MPa. Saturated liquid leaves the condenser at 0.005 MPa. Both the turbine and pump are adiabatic. The turbine has isentropic efficiency of 85%, and the pump is ideal. For the cycle, determine: (8 points) Draw a T-s diagram for the isentropic and actual process. Label the points on the diagram to match those in the cycle sketch below. ) The mass flow rate of the working fluid (steam). The power output of the turbine in Watts. (7 points) The net heat transfer to the working fluid in the boiler, per unit mass of the \text { working fluid } \frac{\dot{Q}_{H}}{\dot{m}} \text { in } \mathrm{kJ} / \mathrm{kg} \text {. } (7 points) The thermal efficiency for the ideal cycle (where the isentropic efficiencies of the turbine and the pump are both 100%). O The actual thermal efficiency of the cycle. g. (7 points) The mass flow rate of the cooling fluid (assume subcooled water with a Cp of4.184 kJ/kgK) If this cooling fluid enters the condenser at 15 °C and leaves at 25 °C.  Fig: 1  Fig: 2  Fig: 3  Fig: 4  Fig: 5  Fig: 6  Fig: 7  Fig: 8  Fig: 9  Fig: 10