An adiabatic open feedwater heater in an electric power plant mixes 0.2 kg/s of steam at 100 kPa and 160°C with 11.5 kg/s of feedwater at 100 kPa and 50°C to produce feedwater at 100 kPa and 60°C at the outlet. Determine the outlet mass flow

Explanation:

-The mass flow rate at the outlet is equal to the sum of the mass flow rates of the constituents:

#Outlet velocity is determined from the outlet's mass flow rate, the outlet area and the specific volume from table A-4

-Let the outlet pipe's diameter be meters.

-We apply the saturated liquid approximation:

Hence, the outlet's velocity is

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