The water in a large lake is to be used to generate electricity by the installation of ahydraulic

The water in a large lake is to be used to generate electricity by the installation of a

hydraulic

turbine-generator at a location where the depth of the water is 50 m. Water is

to be supplied at a rate of 5000 kg/s. If the electric power generated is measured to be

1862 kW and the generator efficiency is 95 percent,

determine

(a) the overall efficiency of the turbine—generator,

(b) the mechanical efficiency of the turbine,

(c) the shaft power supplied by the turbine to the generator.

(a. 0.760 b. 0.8 c. approximate 1960 kW)