Hydroelectric Power

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Hydroelectric Power Powered By Docstoc
					 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)


•Tides/ waves


•Underwater turbines
•Dam: controls the flow of water and creates a reservoir of water
above for energy use when needed
•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
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 complex.


 Now produce about 24% of the world’s electricity


 Supplies more than 1 billion people with power


 Produces 675,000 megawatts (= 3.6 billion barrels of
 oil)
 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 it."

 "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 people
 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 pollution
     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 dam
      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
 source)."
Laws and Regulations?


        none
Is Hydropower really sustainable?
 Siltation reduces a dam’s 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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posted:2/13/2012
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