How to calculate the shaft power and efficiency of a condensing steam turbine
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At present, we know the steam consumption parameters and discharge parameters for various stages of condensing steam turbines. How can we calculate the efficiency of such turbines? Please help us provide the formulas and values for calculating shaft power and efficiency. Thank you. Intake parameters: 3.5 abrg, 148 degrees, 76 t/h; 2.4 barg, 138 degrees, 100 t/hr; 0.5 barg, 111 degrees, 120 t/hr. Vacuum level: 14 KPa
This post was last edited by hyhpsp on 2016-12-2 at 14:18. The total power can be calculated by subtracting the enthalpy values. If the condensing temperature is 50 degrees, its enthalpy is around 200 kJ/kg. 1. (2743–200)*76*1000/3600 = 53 MW. 2. (2717–200)*100*1000/3600 = 69 MW. 3. Is the pressure 1.5 barg? (2697-200)*120*1000/3.6=83MW; the turbine efficiency must be provided by the manufacturer.
You have only calculated the calorific value of the steam; to convert it into shaft power, shouldn’t one also multiply by an efficiency factor? And how is that efficiency factor calculated? Thank you!
Efficiency needs to be provided by the turbine factory!
Give the complete formula. Considering both temperature drop and pressure drop, please provide a complete formula. Thank you!
I know it’s usually provided by the manufacturer, and I’m wondering how the manufacturer calculates it. How can we, as production operators, calculate it more accurately?