Concept explainers
The potential revenue generated by the pump-turbine system.

Explanation of Solution
Given:
Volumetric flow rate of the water
Elevation difference of the water
Efficiency of the turbine-generator
Efficiency of the pump-motor
Operating hours
Unit cost of electric power produced at night is
Unit cost of electric power produced at day is
Density of the water
Acceleration due to gravity
Calculation:
Calculate the minimum power required to pump water from the lower to higher reservoir
Calculate the actual pump electric power
Calculate the actual turbine electric power
Calculate the power consumption cost of the pump.
Calculate the revenue generated by the turbine.
Calculate the net income per year.
Thus, the potential revenue generated by the pump-turbine system is
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Chapter 3 Solutions
Fundamentals Of Thermal-fluid Sciences In Si Units
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