Electric power is to be generated by installing a hydraulic turbine–generator at a site 70 m below the free surface of a large water reservoir that can supply water at a rate of 1500 kg/s steadily . If the mechanical power output of the turbine is 800 kW and the electric power generation is 750 kW, determine the turbine efficiency and the combined turbine– generator efficiency of this plant. Neglect losses in the pipes.

University Physics Volume 2
18th Edition
ISBN:9781938168161
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Chapter4: The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 64P: A Carnot engine has an efficiency of 0.60. When the temperature of its cold reservoir the efficiency...
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Electric power is to be generated by installing a hydraulic turbine–generator
at a site 70 m below the free surface of a large water reservoir that can
supply water at a rate of 1500 kg/s steadily . If the mechanical
power output of the turbine is 800 kW and the electric power generation
is 750 kW, determine the turbine efficiency and the combined turbine–
generator efficiency of this plant. Neglect losses in the pipes.

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