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Pick the correct choice of turbine required to generate 10,000 HP under a head of 81 m while working at a speed of 500 rpm.

Pick the correct choice of turbine required to generate 10,000 HP under a head of 81 m while working at a speed of 500 rpm. Correct Answer Francis

The specific speed is given by the equatioNs = N. Pt1/2 / H5/4 Where, N = the normal speed of turbine = 500 rpm Pt = Turbine output in metric horsepower = 10,000 hp H = effective head = 81 m Ns = 500 x 100 / 815/4 = 205.76 rpm. The turbine which is suitable for a head between 25 to 150 m and Ns of 60 – 300 is Francis turbine i.e reaction type turbine.

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