to 1100°F. the plant has the following feed water heaters: а.A closed FWH with extraction at 1000 psia and pumped condensate. b. A closed FWH at 400 psia with condensate throttled into the next-lowest-pressure FWH. c. An open FWH at 20 psia. Define mass fraction variables. Show mass-flow variable expressions, with arrows indicatemass fractions along various process paths on T-s and flow diagrams. Write equations forconservation of energy for the FWHS that allow you to solve easily for the mass fractions interms of unknown state enthalpies and other mass fractions. Indicate a solution method formass fractions that involves simple substitutions only.
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