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Alternative Energy: Wind Power. By Joon Sang Yoon. Wind Power. - Converting wind energy into a useful form of energy - Transformation of Kinetic Energy (of wind with velocity) into mechanical or electrical energy that can be harnessed for practical use
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Alternative Energy:Wind Power By Joon Sang Yoon
Wind Power • - Converting wind energy into a useful form of energy • - Transformation of Kinetic Energy (of wind with velocity) into mechanical or electrical energy that can be harnessed for practical use • - Generates about 2.5% energy worldwide
History • The first recorded windmills that were created are from China in 1219 • During 17th century, hundreds of windmills were created in Europe and America • Up to 19th century, windmills were used to produce mechanical power to do tasks such as pumping water and grinding stones • 1888: the first electricity producing windmills invented • Today wind turbines are considered as one of possible alternative energy (fastest growth rate among alternative energy sources)
Types Windmill Wind Turbine (HAWT, VAWT)
Advantages • Wind is free • Does not cause green house gases as it produces electricity • Needs small portion of land • Isolated areas that are not connected to the electricity power grid can use wind turbines to produce their own supply • Arranges a lot in a size – can be used for one household to whole city
Disadvantages • The strength of the wind is inconstant – leads to inconstant produce of electricity • Even though it takes only small part of a land, it can block the views and change the landscape • It can be noisy as a car travelling 70miles per hour. • With a 25% capacity factor, a 1.5-MW wind turbine (100m tall) would produce(1.5 MW × 365 days × 24 hours × 25% = 3,285 MWh=) 3,285,000 kWh and it would allow about 330 households to use it. Thus, it will need huge wind power farm to supply a big city or even a nation.
News#1 Increases the employment rate
News#2 Noisy attracts complains
Conclusion • Kinetic Energy (velocity of wind) converted to electricity through generator • Has advantages but also disadvantages • Has lots of room to advance
Citation • http://www.aweo.org/windmodels.html • http://greenliving.nationalgeographic.com/alternative-energy-wind-electricity-2191.html • http://www.nytimes.com/2009/12/25/business/25climb.html • http://www.nytimes.com/2010/10/06/business/energy-environment/06noise.html?_r=0 • http://www.umass.edu/windenergy/publications/published/communityWindFactSheets/RERL_Fact_Sheet_2a_Capacity_Factor.pdf • http://energy.korea.com/archives/11357 • http://inhabitat.com/eddy-gt-wind-turbine-is-sleek-silent-and-designed-for-the-city/ • http://epa.gov/climatestudents/solutions/technologies/wind.html • http://www.mechanicalengineeringblog.com/tag/wind-turbines/
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