Diameter 150㎜=0.15/2=0.075*0.075*3.1416=0.0177*1.5=0.027, P=9.81HQn=9.81*100*0.027*0.8=21 .19kw
By theoretical calculation: The cross section of the pressure pipe is 0.0177 m2, the flow rate is estimated to be 1.5 m/S, and the flow rate = 0.027 m2/S. Theoretically, it can generate 21.19 kW of electricity, 1 h = 21.19 kW.h (degree ).