A simple steam cycle has the following conditions: Boiler exit conditions (1); Pressure 14MN/m2 and Temperature 510°C > Condenser inlet conditions (2); Pressure 0.004 MN/m2 Turbine Adiabatic efficiency; 90% >

The flow at condenser exit is saturated water at 0.004 MN/m2. > The boiler feed pump work is negligible. > The steam mass flow rate is 340 kg/s a)Produce a hardware diagram of this simple steam cycle label each of the points. Draw the steam cycle on the steam enthalpy-entropy chart provided. Evaluate the specific enthalpy at each point around the cycle including the isentropic turbine exit conditions (2'). Include the enthalpy at condenser exit.[2 marks] What is the dryness fraction at turbine exit? Evaluate the thermal efficiency of the cycle. Evaluate the power output of the cycle assuming the electric generator has no losses. An alternative design of the steam cycle in the bookwork question above is proposed, it involves the addition of a re-heat system. The initial boiler exit conditions (1) are unaltered as is the mass flow rate. The following changes are made; > The turbine and boiler systems are modified > An HP (high pressure) turbine exhausts at conditions (A) a pressure of 1.0 MN/m2.Assume the efficiency of the HP turbine is the same as the original turbine, The steam is returned to the boiler, heated and enters an LP (low pressure) turbine at conditions (B) at 510°C. No pressure loss occurs from HP exit to LP inlet. The condenser inlet pressure is as before, a Pressure of 0.004 MN/m2 the new label is (2R). > The dryness fraction at LP turbine exit is 0.95 Make a new hardware diagram showing the steam cycle including the re-heat system.Include the labels as described above.[2 marks] Add to your steam chart the new points: HP turbine exit (A) LP turbine inlet (B) LP turbine isentropic exit (2R') LP turbine exit (2R) What is the adiabatic efficiency of the LP turbine? What is the power output of the amended design? By how many percent does the overall thermal efficiency improve?