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Wind Energy

Wind Energy. Caitlin Reidy. How WIND TURBINES Work. Similar to a hydroelectric generator Wind current spins rotor of a turbine Rotor drives shaft of generator Generator produces electricity

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Wind Energy

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  1. Wind Energy Caitlin Reidy

  2. How WIND TURBINES Work • Similar to a hydroelectric generator • Wind current spins rotor of a turbine • Rotor drives shaft of generator • Generator produces electricity • Can be a few feet – hundreds of feet in diameter

  3. Economics • 2.5-5.5 cents per kilo-watt hour: price expected to keep dropping as technology improves • Cost-competitive to fuel sources • Least expensive of renewable sources • Building + Producing leads to a wide variety of jobs • Unaffected by international conflicts • Pays for itself in 3-8 years, lasts for up to 40

  4. Environmental Benefits • Renewable – does not exhaust other natural resources • Does not emit pollutants that are believed to be the cause of global warming when used • Energy needed to build a turbine is renewed in a matter of months • One wind turbine = 2,000 tons of carbon dioxide displaced per year (equivalent of 1 sq. mile of forest) • ^also the equivalent of: • Recycling 4,500 glass jars • Recycling 6,900 aluminum cans = • Recycling 1,150 lbs of steel

  5. Potential • Fastest growing renewable energy source – over a decade • Annual growth rate >20% • 2008: US increased generating capacity by over 50% • Can power 7 million households in US, right now • Potential to provide up to 10,777 kWh annually, 2x as much generated today

  6. Video Clip • http://www.youtube.com/watch?v=tsZITSeQFR0

  7. *Points of Interest • Reliability? • Unsightly? • Noisy? • Kills Birds?

  8. Numbers • 1.2 to 2.6 million, per MW of capacity • Smaller turbines: 3-5 thousand per kilowatt of capcity • 10 kilowatt (average house) would cost approx.$35,000 • 8 wind turbines: 6 months to asseble • Typically lasts 30 years, with some replacements

  9. Credits • http://www.scientificamerican.com/media/gallery/C651137E-9CD0-7A28-6FB054DBFF592EBC_3.jpg • http://www.mywindpowersystem.com/2009/07/land-for-wind-farms-have-you-got-land/ • http://2.bp.blogspot.com/_JdFs87ua_1s/SI6AUswPhlI/AAAAAAAAE70/YU4JFpT_Drw/s400/windmill+farm.jpg • http://www.mywindpowersystem.com/marketplace/wp-content/uploads/2009/11/GE-2_5MW-Wind-Turbine.jpg • http://www.nrgsystems.com/AboutWind/HowtheWindCreatesElectricity.aspx • http://www.alternative-energy-resources.net/disadvantages-of-wind-energy.html • http://wind-turbine.tripod.com/sitebuildercontent/sitebuilderpictures/phk_ee_re_001502-3.jpg

  10. Credits • http://www.copper.org/environment/green/casestudies/wind_energy_myth/images/chart.gif • http://www.windenergyplanning.com/wordpress/wp-content/uploads/2009/01/wind-turbine-noise.jpg • http://www.china-mike.com/wp-content/uploads/2011/03/economist-global-wind-power-chart.gif • http://www.copper.org/environment/green/casestudies/wind_energy_myth/images/chart.gif

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