Wind Turbines• Vinay Anam• Sem -2• Rachana sansad acadmeny of architectureSustainable building technology
Rachana Sansad Academy of ArchitectureAbout Wind Energy•Wind energy is one of the cleanest forms of producing powerfrom renewable source•Most of our electricity is used in buildings, and generating theelectricity on site reduces the need for transmission. This in turnreduces transmission losses as well as the materials needed forwiring and poles•Wind speed typically increases with height, as it is less affectedby trees and surrounding topography. Putting wind turbines ontop of buildings—especially tall buildings—should allow them totake advantage of height without an expensive, full-size tower.•Wind energy is one of the cleanest formsof producing power
Rachana Sansad Academy of ArchitectureWind EnergyHow Wind Turbines work•Wind is a form of solar energy. Winds are caused by the uneven heating of theatmosphere by the sun, the irregularities of the earths surface, and rotation of theearth. Wind flow patterns are modified by the earths terrain, bodies of water, andvegetation.• We use the motion energy to sail, fly a kite, or generate energy.• Wind turbines convert the kinetic energy in the wind into mechanical power.• The wind turns the blades, which spin a shaft, which connects to a generator andmakes electricity.•Types of Wind Turbines•Horizontal Wind Turbines•Vertical Wind Turbines
Rachana Sansad Academy of ArchitectureHow wind turbines work
Rachana Sansad Academy of ArchitectureParts in wind turbines
Rachana Sansad Academy of ArchitectureWind Turbines components
Rachana Sansad Academy of ArchitectureFactors affecting Wind turbinesIn some cases, building geometry can enhance wind turbine performance.Several manufacturers of building-integrated wind turbines are takingadvantage of the increased wind velocities at building parapets—where thewind rises up the façade of a large building and curls over the edge. Somearchitects are designing wind scoops right into the structures of buildings orsituating building towers to funnel wind into turbines.
Rachana Sansad Academy of ArchitectureU.K.-manufactured Quiet Revolutionturbines produce 3 kW of power in25 mph (11 m/s) wind.The 400-watt AVX400 turbine fromAeroVironment, released in 2006and shown here, has since beenreplaced by the 1-kilowatt AVX1000.New technologies
Rachana Sansad Academy of ArchitectureA wind turbine works byextracting kinetic energy out of the wind andconverting it to mechanical and then electricalenergy.Power generated by wind tunnel is calculated as follows
Rachana Sansad Academy of ArchitectureFactors locating the wind turbines•Local wind climate area•Shaping tall buildings to have greatest wind resource•Latitude of the place•Altitude of the place•Topography of the place•Scale of the hour, month or year
Rachana Sansad Academy of ArchitectureSizes of Wind turbines•Wind turbines for land-based wind farms come in many sizes, withrotor diameters ranging from about 50 meters to about 90 meters.•Small wind turbines intended for residential or small business useare much smaller. Usually are about 40 meters total.Power generated of Wind turbines•The output of a wind turbine depends on the turbines size and thewinds speed.•Wind turbines being created now have power ratings ranging from250 watts to 5 megawatts (MW).•Wind speed is very important in projecting turbine performance.•An average wind speed greater than four meters per second (m/s) (9mph) is required for small wind electric turbines•Larger wind power plants require minimum average wind speeds of6 m/s (13 mph).
Rachana Sansad Academy of ArchitecturePowerTo calculate the amount of power a turbine can actually generate from the wind,you need to know the wind speed at the turbine site and the turbine power rating.Considering steady wind speeds, its the diameter of the rotor that determineshow much energy a turbine can generate. Keep in mind that as a rotor diameterincreases, the height of the tower increases as well, which means more access tofaster winds.
Rachana Sansad Academy of ArchitectureExamples of Building using wind turbinesThe building Bahrain world trade centrea twin skyscraper complex it has three wind turbineswith diameter of 29 meter each are supported by bridgesspanning between the complexs two towers. Through its positioning and the uniqueaerodynamic design of the towers, the prevailing on-shoreGulf breeze is funneled into the path of the turbines,helping to create power generation efficiency.the wind turbines will deliver approximately 11-15% of theenergy needs of the building,or 1100 to 1300 megawatt-hours per year –enough to provide light in 300 homes for over a year
Rachana Sansad Academy of ArchitectureThis opening in the face of the PearlRiver Tower will funnel wind to avertical-axis wind turbinePearl river tower
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Rachana Sansad Academy of ArchitectureRefereneshttp://www.buildinggreen.com/auth/article.cfm/2009/4/29/The-Folly-of-Building-Integrated-Wind