The schematic of a power cycle using water flowing each component is shown. Water flows through the boiler and condenser at constant pressure and through the pump and turbine adiabatically.
Process 4-1: constant pressure at 1 MPa from saturated liquid to saturated vapor
Process 2-3: constant pressure at 20 kPa from x2 = 88% to x3 = 18%. Determine a) is the cycle reversible, irreversible or impossible, b) the thermal efficiency and c) how does this compare with the theoretical maximum efficiency?