A Pelton wheel is required to develop 4000 kW at 400 revs/min, operating under a net head of 350m. There are two jets and the bucket deflection angle is 165 degrees. Calculate the bucket pitch circle diameter, the cross-sectional area of each jet, and the hydraulic efficiency of the turbine. Make the following assumptions 

(i) overall efficiency is 85% when the water is discharged from the wheel in a direction parallel to the axis of rotation

(ii) Co-efficient of the velocity of nozzle Kv=0.97 and the blade speed ratio Ku=0.46

(iii) the relative velocity of water at the exit from the bucket is 0.86 times the relative velocity at the inlet.

Answer rating: 100% (QA)

Given P4000 kw N400 rpm H350 m Overall 85 blade speed ... View the full answer