Hydropower
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Hydropower

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Hydropower Hydropower Presentation Transcript

  • HYDROPOWER
    • Energy of moving water
    • As long as sun shines and rain and snow fall we will have hydropower
  • History
    • Greeks used water wheels to grind wheat into flour over 2000 years ago
    • In early 1800’s, water wheels were used to power machines in factories
    • In the late 1800’s,
    • hydropower was first used
    • to generate electricity
  • Photograph of old power plant above Niagara Falls
  • Niagara Falls , American Falls
  • Easier to build on a river where there is a natural waterfall Athabasca Falls, Oregon
  • Dams make artificial waterfalls Bonneville Dam on the Columbia River between Washington & Oregon
  • The water held back by the dams (reservoirs) are stored energy Lake Powell Utah
  • The dam needs gates to open & close
  • The water spins the blades of the turbines
    • This is a turbine that has been
    • replaced at the
    • Bonneville Dam
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  • Old turbine being removed
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  • Replacement Turbine
  • the generator (the turbine is underneath)
    • Row of turbines
    • in the
    • powerhouse
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  • Power plant at Bonneville Dam
  • Advantages
    • Cheapest way to produce electricity in the United States
    • Does not pollute
    • Does not add to global warming
    • Is a renewable energy source
  • Disadvantages
    • *Changes the flow of the river
    • *Land floods where reservoir is formed
    • *Some beautiful, fertile land might be flooded
    • *People and businesses may need to relocate
    • * Fish and wildlife may be disturbed
  • Example: Pacific Salmon
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  • Top view of fish ladders
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  • Window into fish ladder
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  • Hydropower in the U.S.
    • Most hydropower
    • 1. Washington
    • 2. California
    • 3. New York
    • 4. Oregon
    • 5. Tennessee
  • http://www.msnbc.msn.com/id/21134540/vp/24253799#24253799
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