+ Wind Energy Caitlin Reidy. + How WIND TURBINES Work Similar to a hydroelectric generator Wind...
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Transcript of + Wind Energy Caitlin Reidy. + How WIND TURBINES Work Similar to a hydroelectric generator Wind...
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Wind EnergyCaitlin 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
Can be a few feet – hundreds of feet in diameter
+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
+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
+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
+*Points of Interest
Reliability?
Unsightly?
Noisy?
Kills Birds?
+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
+Credits http://www.scientificamerican.com/media/gallery/C651
137E-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
+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