Question 2 Steam is the working fluid in the vapor power cycle with reheat. The T-s diagram for the cycle is shown in Fig. 1, with operational data. The mass flow rate is 2.3kg/s, and the turbines operate adiabatically. Steam exits both turbine 1 and turbine 2 as saturated vapor. The reheat pressure is 15 bar. [Reference temperature is 25degC ] a) Sketch the possible cycle, labelling all components [5] b) Determine the net power produced by the cycle, in kW [6] c) Determine the isentropic efficiency of stage 1 turbine [6] d) Determine the total exergy destroyed in stage 1 turbine, assuming the system is adiabatic. e) Discuss one benefit of using reheat between expansion. [5] [Use your tables to determine additional information required] [3] Figure 1: T-s diagram for the vapour power cycle Question 2 Steam is the working fluid in the vapor power cycle with reheat. The T-s diagram for the cycle is shown in Fig. 1, with operational data. The mass flow rate is 2.3kg/s, and the turbines operate adiabatically. Steam exits both turbine 1 and turbine 2 as saturated vapor. The reheat pressure is 15 bar. [Reference temperature is 25degC ] a) Sketch the possible cycle, labelling all components [5] b) Determine the net power produced by the cycle, in kW [6] c) Determine the isentropic efficiency of stage 1 turbine [6] d) Determine the total exergy destroyed in stage 1 turbine, assuming the system is adiabatic. e) Discuss one benefit of using reheat between expansion. [5] [Use your tables to determine additional information required] [3] Figure 1: T-s diagram for the vapour power cycle