I am studying this on my own and am so lost - pleasehelp..... A steam turbine receives steam with a flow of 15 kg/s andexperiences a heat loss of 14 kw. Using the properties below,find the power: IN OUT Pressure 6205kPa 9.859kPa Temperature 811.1K 318.8K Velocity 3048m/s 274.3m/s Specific InternalEnergy 3150.4kJ/kg 2211.8kJ/kg SpecificVolume .05789m3/kg 13.30m3/kg I am studying this on my own and am so lost - pleasehelp..... A steam turbine receives steam with a flow of 15 kg/s andexperiences a heat loss of 14 kw. Using the properties below,find the power: IN OUT Pressure 6205kPa 9.859kPa Temperature 811.1K 318.8K Velocity 3048m/s 274.3m/s Specific InternalEnergy 3150.4kJ/kg 2211.8kJ/kg SpecificVolume .05789m3/kg 13.30m3/kg
Explanation / Answer
the thrust on the steam turbine is F = (dm/dt) * v the power of the engine P = F * v or P = (dm/dt) * v * v = (dm/dt) * v^2 (dm/dt) = 15 kg/s and v = (v1 - v2) = (3048 - 274.3) m/s =2773.7 m/s