A steam power plant operates on an ideal regenerative Rankine cycle. Steam enters the turbine at 5 MPa, 450oC and is condensed in the condenser at 15 kPa. Steam is extracted from the turbine at a pressure of 0.4 MPa and enters the open feed water heater. Water leaves the feed water heater as a saturated liquid. Determine
(a) The thermal efficiency (ηth) of the cycle and
(b) The net work output per kilogram of steam (wnet) flowing through the boiler.