Question

# We add superheat and reheat to the cycle above. Steam enters the first turbine stage at 10 MPa,760 K, and leaves at 0.5 MPa. Subsequently, it is reheated to 700 K and enters the second turbine stage. It leaves the second turbine stage at 0.005 MPa. Saturated liquid leaves the condenser at 0.005 MPa. The turbines have isentropic efficiency of 85%, and the pump is ideal. The power plant has 200 MW net power. Determine: a. (10 points) Draw a sketch of the system, and label all the components. Number the flow,starting with 1 at the pump inlet. (8 points) Draw a T-s diagram for the isentropic and actual process. Label the points in the diagram to match the sketch of the system. c. (8 points) The mass flow rate of the working fluid (steam). Compare to the answer you got in problem 1. Is it less, the same or greater? d. (8 points) The thermal efficiency of the ideal cycle (when the isentropic efficiencies of the turbines and the pump are 100%). Compare to the answer you got in problem 1. Is it less,the same or greater? . (8 points) The actual thermal efficiency of the cycle. Compare to the answer you got in problem 1. Is it less, the same or greater? f. (8 extra points) The mass flow rate of the cooling fluid (assume subcooled water with a Cpof 4.184 kJ/kgK) If this cooling fluid enters the condenser at 15 °C and leaves at 25 °C.Compare to the answer you got in problem 1. Is it less, the same or greater?  Fig: 1  Fig: 2  Fig: 3  Fig: 4  Fig: 5  Fig: 6  Fig: 7