# Steam turbine output power

The mass rate of flow into a steam turbine is 4500 kg/h and the heat transfer from the turbine is 8.8 kW. The following data are known for the steam entering and leaving the turbine.

Inlet Exit

Pressure 20 bar 1 bar

Temperature 420 C

Quality 100%

Velocity 60 m/s 150 m/s

Elevation above datum 5 m 3 m

Determine the output power of the turbine.

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#### Solution Preview

Please see the attachment for a solution.

Solution:

The useful power can be determined by applying the equation of energy:

(1)

where

steam (water) mass flow rate (kg/s)

inlet specific static enthalpy (and similarly for the outlet) (kJ/kg)

...

#### Solution Summary

The output power of a steam turbine is determined based on the mass rate of flow and heat transfer.