CE 704 · Chapter 7
Hydropower Engineering past question
7.1.4 Preliminary design of Francis and Pelton turbines
Consider the design of a multi-jet pelton wheel with parameters and operating conditions as given below: Head=200m; Flow rate=4m³/s; Nozzle velocity coefficient=0.98; Wheel dia.=1.47m; Mechanical efficiency=86%; Blade speed to jet speed ratio=0.47; Jet dia. to wheel dia. ratio=0.113. (i) Calculate the wheel rotational speed (rev/min). (ii) Calculate the power output (MW). (iii) Determine no. of nozzle required. (iv) Calculate specific speed of machine. [8]