Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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In a hydroelectric power plant, water at 20°C is supplied to the turbine at a rate of 0.55 m³/s through a 200-m-long, 0.35-m-diameter
cast iron pipe. The elevation difference between the free surface of the reservoir and the turbine discharge is 140 m, and the
combined turbine-generator efficiency is 79 percent. Disregarding the minor losses because of the large length-to-diameter ratio,
determine the electric power output of this plant. The density and dynamic viscosity of water at 20°C arep= 998 kg/m3 and u= 1.002
x 10-3 kg/m-s. The roughness of the cast iron pipes is ɛ = 0.00026 m.
The electric power output of this plant is kW.
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Transcribed Image Text:In a hydroelectric power plant, water at 20°C is supplied to the turbine at a rate of 0.55 m³/s through a 200-m-long, 0.35-m-diameter cast iron pipe. The elevation difference between the free surface of the reservoir and the turbine discharge is 140 m, and the combined turbine-generator efficiency is 79 percent. Disregarding the minor losses because of the large length-to-diameter ratio, determine the electric power output of this plant. The density and dynamic viscosity of water at 20°C arep= 998 kg/m3 and u= 1.002 x 10-3 kg/m-s. The roughness of the cast iron pipes is ɛ = 0.00026 m. The electric power output of this plant is kW.
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