Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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The flow of a river is 150 cubic feet per second at a site where a 75 feet hydrostatic head canbe created by the erection of a dam. What is the potential capacity (in kW) of a hydroelectricpower plant if installed at this site? Consider that hydraulic efficiency of energy conversioncan be 80%, and that the electric efficiency can be 90%.
Question 4:
The three gorges dam is rated at maximum output. If its generating efficiency is 90 % and
its head is 81 m what is the rate of flow in (kg/s) of water through its turbines at
maximum output.
Water from a reservoir is being supplied to a powerhouse that is located at an elevation 325 m below that of a reservoir surface. Discharging through a nozzle, the water has a jet velocity of 75 m/s and a jet diameter of 250 mm.
a) Find the head lost between the reservoir and the jet in meters.
b) Use the power formula to determine the power in the jet in kilowatts.
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