Upload
edward-patterson
View
223
Download
4
Tags:
Embed Size (px)
Citation preview
Ryan Ray
Ridley Shetler
Reuben Robertson
Cassie Clarke
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
Coils and magnets did not line up easily
Material issues
Gear needed too much initial torque to begin spinning
Chain was too heavy
Modifications to casing
Reducing friction
Creating more power
Turbine Attachment
Construction
Vertical Axis Wind Turbine (VAWT)
Advantages
Disadvantages
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
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
Produced electricity
Low efficiency
Design setbacks
Possible Improvements
How electricity is created