A proposed design for a hydroelectric project is based on a discharge of 0.25 m ³ /s through the penstock and turbine (Fig. P12.50). The friction factor can be assumed constant, f = 0.015, and the minor losses are negligible.

(a) Determine the power in kilowatts that can be expected from the facility, assuming that the turbine efficiency is 0.85.

(b) Show that the type of machine to be installed is a Francis turbine if the desired rotational speed is 1200 rpm.

(c) Determine the size, actual speed, and actual power output of the selected turbine.

el 915 m L-350 m, D 00 mm, el 92m Fig. P12.50