Applying the Entropy Balance: Control Volumes Figure P6.111 shows several components in series, all operating at steady state. Liquid water enters the boiler at 60 bar. Steam exits the boiler at 60 bar, 540C and undergoes a throttling process to 40 bar before entering the turbine. Steam expands adiabatically through the turbine to 5 bar, 240C, and then undergoes a throttling process to 1 bar before entering the condenser. Kinetic and potential energy effects can be ignored. (a) Locate each of the states 2-5 on a sketch of the T-s diagram. (b) Determine the power developed by the turbine, in kJ per kg of steam flowing. (c) For the valves and the turbine, evaluate the rate of entropy production, each in kJ/K per kg of steam flowing. (d) Using the result of part (c), place the components in rank order, beginning with the component contributing the most to inefficient operation of the overall system. (e) If the goal is to increase the power developed per kg of steam flowing, which of the components (if any) might be eliminated? Explain. Liquid water, P = 60 bar 2 Boiler P2 = 60 bar T = 540C Valve V3 P3=40 bar Turbine P4=5 bar T4=240C O Valve 6 Condensate, P6=1 bar Condenser 5 P5=1 bar