3P = DSV3 P = Power D = Air Density S = Sweep Area of Rotor Varies from summer to winter. More power (Dense) in the winterS = Sweep Area of RotorDoubling the sweep area has the effect of increasing the total power in the wind stream by a factor of FourV3 = Velocity cubed -- Importance of SightingIf the wind speed Doubles, Wind Power grows eight fold;If the wind speed Triples, Wind Power grows twenty-seven fold.
4Height of tower 2nd major factor in wind power Rule of thumb: #1There is 1/7 more wind at 100 feet than at ground levelWhich equates to3/7 more wind power at feet
5Types of Wind MachinesHorizontal AxisDownwind UpwindVertical Axis
6Push vs. LiftVertical AxisPushmachineHorizontal AxisLift
7Vertical Axis First record of Wind Machine 200 BC Persian MillsVertical AxisFirst record of Wind Machine
8Heron of Alexandria Organ run by Wind Power 100 ADHeron of AlexandriaOrgan run by Wind Power
36First Commercially Successful Self Governing Windmill 1854 Halladay MillFirst Commercially Successful Self Governing WindmillSmall Scale water pumping systems were perfected starting with the Halladay windmill
63Winco1800 watt, 32 volt, 12' diameter, down wind design-blades act as a tail. Band brake forshut off. Blades feather in high winds. Flyball Governor activates with RPM and wind pressure against the blades.Win Power
73History behind the Whisper H40 In the late 1970’s Elliott Bayly invented the WhirlwindUnfortunately The Whirlwind design was not successfulElliott made a second attempt at building wind turbines and started World Power Technologies in the mid 80’s.In the 90’s SouthWest Wind Power bought out World Power and have been improving the design ever sinceWe all owe Southwest wind power a vote of thanks for preserving the small wind-turbine industry
74Return of the Direct Drive Wind Turbine BergeyReturn of the Direct Drive Wind Turbine
75Bergy Excel 10 KWBergy has also made a major contribution to the small wind-turbine industry.
98Facts About Iowa’s Wind Farms 2002 354 TurbinesRotor Dia.50 MetersTower Height165 Ft.ZeroEmissionsPeopleemployed6 Mo.40 People on sightfulltimePowers66,204 Homes =382,094 Tons of Coal$ That stay in Iowa$6.2 Mil Yr.Reduced EmissionsC Billion TonsSOX Mil. lb.NOX Mil. lb.Mercury lb.Community Profits:$2,000 per Turbine= $640,000 per year to the community.Wind Farm pays $2,000,000 per year in local Taxes
992002 General Electric gets into the Wind Business 2002 General Electric gets into the Wind Business
100GE has expanded into one of the fastest-growing segments of the global energy industry with the addition of its new wind energy business. Last year, a record 6,500 megawatts of new wind power generating capacity, enough to provide electricity to roughly 1.5 million homes, were added worldwide.
101Photovoltaics Can Complement Wind Electricity Source: Simulation in Waterloo Location by Iowa Energy Center