Power Stations Water power stations. Introduction  Hydroelectricity - electricity generated by hydropowerelectricityhydropower  Production of electrical.

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Presentation transcript:

Power Stations Water power stations

Introduction  Hydroelectricity - electricity generated by hydropowerelectricityhydropower  Production of electrical power through the use of the gravitational force of falling or flowing water.  It is the most widely used form of renewable energy.renewable energy  16 percent of global electricity generation – 3,427 terawatt-hours of electricity production in  It is expected to increase about 3.1% each year for the next 25 years.

Generating methods  Conventional (dams)  Pumped-storage  Run-of-the-river  Tide

Cross section  Cross section of a conventional hydroelectric dam

Cross section a hydroelectric “battery”  Cross section of a hydroelectric “battery”

Turbine and generator  Hydraulic turbine and electrical generator, cutaway view. A : Generator; B : Turbine; 1 : Stator, 2 : Rotor, 3 : Wicket gate, 4 : Turbine blade, 5 : Water flow, 6 : Turbine generator shaft.

Types of water turbines  Pelton Turbine  Francis Turbine  Kaplan Turbine

Design and application  Kaplan 20 < H < 40  Francis 10 < H < 350  Pelton 50 < H < 1300