1. An open FWH receives steam at 1 MPa, 200?C from the turbine and 1 MPa, 100?C water from the feed water line. Find the required fraction of the extraction flow in the turbine.
2. A power plant for a polar expedition uses ammonia and the boiler exit is 80?C, 1000 kPa, and the condenser operates at -15?C. A single open FWH operates at 400 kPa with an exit state of saturated liquid. Find the mass fraction extracted in the turbine.