A feed water heater has water at a mass flow rate of 5 kg/s at 5 MPa,

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A feed water heater has water at a mass flow rate of 5 kg/s at 5 MPa, 40oC flowing through it, being heated from two sources. One source adds 900 kW from a 100oC reservoir and the other source adds heat from a 200oC reservoir such that the water exit conditions are 5 MPa and 180oC. (a) Determine the exegetic efficiency of the device. Let T0 = 25o, p0 = 1 atm.
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