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Ryan Ray
Ridley Shetler
Reuben Robertson
Cassie Clarke
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Design and build a windmill that will generate electricity.
Make a simple system that works without complications.
Make generator and windmill run efficiently with consistent results
Use readily available materials
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Coils and magnets did not line up easily
Material issues
Gear needed too much initial torque to begin spinning
Chain was too heavy
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Modifications to casing
Reducing friction
Creating more power
Turbine Attachment
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Construction
Vertical Axis Wind Turbine (VAWT)
Advantages
Disadvantages
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P=.5*p*A*Cp*V*Ng*Nb p=air density for Knoxville~1.164kg/m^3 A=rotor area exposed to wind~.330m^2 Cp=coefficient of performance~.59 for
max V=wind speed ~1.7 m/s Ng=generator efficiency~25% Nb=bearing/gear efficiency~55% Theoretical=.0265 volts Actual=.00123 volts 4.64% efficient
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2 ft of Wire--$1 5 Arizona cans--$.25 26 Magnets--$24 11 Nails-$.55 5 Wire hangers--$.50 2 Two-liters--$.50 Blender part--$2 1 metal turn buckle--$2 3 Skateboard bearings--$6 Salvaged Wood --$3 TOTAL COST: $39.80
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Produced electricity
Low efficiency
Design setbacks
Possible Improvements
How electricity is created