Water falls from a height of 60m at the rate of 15kg.s to operate a turbine. The losses due to friction forces are 10% of energy. How much power is generated by the turbine? g=m/s2?
A.
7kW
B.
10.2kW
C.
12.3kW
D.
8.1kW
Answer: Option D
Explanation:
P = W/t=mgh/t=(15×10×60)/1 = 9000W = 9kW Loss=10% Useful power=90% of 9kW = (90×9)/100=8.1kW.