Question

A 3-jet Pelton wheel is to be installed at a high head site with a gross head of 320m and a design flow of 0.85m3 /s. The pipeline length is 2000m and a steel pipe of 700mm diameter is to be used. The roughness value, k, for the pipe is 2.5mm. Take the velocity coefficient for the jets as 1.0. Determine the diameter of the wheel and the shaft mechanical power output in Megawatts at full power if the selected rotational speed, N is 1000rpm.

(take ղ = 92%).

Answer 1