A feedwater heater is a device to heat the feedwater before it goes into the boiler....

A feedwater heater is a device to heat the feedwater before it goes into the boiler. This device receives one stream of saturated vapor at 0.8 MPa and another stream of compressed liquid at 0.8 MPa and 60 oC. These two streams combined to become saturated liquid at 0.8 MPa at the exit of the feedwater heater. The mass flow rate of the compressed liquid is 100 kg/s. Determine a) the mass flow rate of the saturated vapor, b) the exergy destroyed in the feedwater heater (To=300K, Po=0.1 MPa) (10)

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