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Hydroelectric Power


Zach Rodgers Stephanie Wilkie Pat Verrastro Leann Baer Harvesting the energy of moving water to produce electricity for our own needs. Streams/ rivers (most common ... – PowerPoint PPT presentation

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Title: Hydroelectric Power

Hydroelectric Power
  • Zach Rodgers
  • Stephanie Wilkie
  • Pat Verrastro
  • Leann Baer

What is Hydroelectric Power?
  • Harvesting the energy of moving water to produce
    electricity for our own needs.

  • Streams/ rivers (most common)
  • Tides/ waves
  • Underwater turbines

How A Hydropower plant works
  • Dam controls the flow of water and creates a
    reservoir of water above for energy use when
  • Penstock pipe channeling water from the dam to
    the turbines
  • Turbines large blades attached to a cylinder
    that move when the water pushes against it
  • Generator parts connected to the turbines that
    create the electricity by moving large magnets
  • Inductor changes the form of electricity to one
    that can be used
  • Transmission Lines transport energy to places
    that need it

(No Transcript)
Historical Uses
  • Greeks and Romans used hydropower to power mills
    to grind corn
  • Domesday Book (1086) listed 5,624 water-wheel
    driven mills in England south of the Trent River
    (about 1 mill for every 400 people)

Present Day
  • Same concept as historical mills, but more
  • Now produce about 24 of the worlds electricity
  • Supplies more than 1 billion people with power
  • Produces 675,000 megawatts ( 3.6 billion barrels
    of oil)

The Hoover Dam
  • Located about an hour from Las Vegas
  • A total of 19 turbines create 2,998,000
    horsepower which translates into 4 billion
    kilowatt hours a year
  • 17 turbines give energy to the nearby cities,
    while 2 give energy to the power plant
  • Serves 1.3 million people

Opposition to Statistics
  • Church Ciocci ( Executive Director of the
    National Hydropower Association) "Even if you
    look at Hoover, as popular as the Hoover dam is,
    that dam was first built for water purposes
    beyond energy.  They added energy to help pay for
  • "Hydropower is only on two percent of all the
    dams of the U.S.  That means there is 98 percent
    of the dams that are currently in the U.S. that
    have no power generation on them whatsoever.  So
    there is a tremendous growth opportunity there in
    the existing facilities."

Enhancing Developed Areas
  • Can be done in countries that use hydro power,
    currently worldwide 24 of the electricity is
    made by hydro-power supplying over 1billion
  • Produces a good amount of energy with very low
    environment damaging effects
  • Its already producing 10 of USA's energy it
    could be used to produce more if more effort and
    funds were put forth towards it

New Development in Less Developed Areas
  • Small hydro popular in China, which has over 50
    of world small hydro capacity.
  • An undeveloped country can do the same and make a
    great amount of power instead of relying on
    fossil fuels.
  • A newly developing country's problem is getting
    enough energy to make demands of a growing
    population and it would cost them to much to
    investing in foreign oils a long with to much

Potential of Hydropower
  • Could create 1000s of new jobs
  • The USA could install between 23,000 to 60,000
    megawatts of additional capacity by 2025 that
    could serve 31millions homes with electricity
  • From June 2008 to July 2009 1.5 megawatts were
    produced, powering about 150,000 homes
  • Hydro-power dams are already at work holtwood dam
    and the new manufactured turbines in the Voith

Potential of Hydropower
  • Hydro-power has many advantages to use to help
    develop clean and a safe energy source, self
    sustaining, possible flood control, and very
    efficient ranging from 90-95
  • They can improvement environments for a wide
    species of animals while affecting none in a
    negative way
  • Its possible to use the ocean's tides as power.

Environmental Problems
  • Emissions of greenhouse gases
  • Dams/ turbines diminish aquatic populations
  • Impacts quality of water
  • Flooding

Social Problems
  • Significant start-up cost
  • Visually unattractive
  • Relocation
  • Water rights issues

Water Rights
Social Problems
  • "It's got to be cost effective, or I just won't
    support it," said Minnesota Councilmember Mark
    Freeburg. "I won't do it just to make people feel
    good (that we are creating a renewable energy

Laws and Regulations?
  • none

Is Hydropower really sustainable?
  • Siltation reduces a dams water storage so water
    stored in the wet season cannot be stored for use
    in the dry season
  • The life of dams can be extended by sediment
    bypassing, special weirs, and forestation project
    to reduce silt production. At some point, it
    becomes uneconomic to operate in most cases.

  • Water flow can decrease in areas due to
    environmental problems such as global warming
  • the North Cascades glaciers have lost a third of
    their volume since 1950, resulting in stream
    flows that have decreased by as much as 34
  • no burning of fossil fuels
  • Even though water sources can eventually be
    reduced, other water resources will always be
    available due to the water cycle
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