4.2. Case B2: P is specified
As in the case of an impulse turbine, assume that P is 100 kW
and it is desired to determine the optimal flow discharge and
optimal penstock diameter to produce this power. In this case, the
optimal discharge is determined using Eq. (25), which gives 82 L/s.
After the optimal flow discharge has been determined, a similar
procedure to Case A2 can be followed to determine the optimal pipe
inside diameter. The optimal pipe inside diameter results in
0.171 m. This diameter is slightly smaller than that found for an
impulse turbine and for the same flow discharge.