Transcript THE WONDER WHEEL - UTK EFD News/Announcements

THE WONDER WHEEL
Claire Fage, Jared Smith, Brittani Perez,
Bryan Fly, Rusty Castleberry
Team Members
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Left to right:
Jared Smith, Claire Fage, Rusty Castleberry, Bryan Fly, Brittani Perez
Initial Ideas
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Fan blades out of Coke cans
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The axel would turn a series of gears, which
would turn the generator
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Vertical standing windmill
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Three bladed fan
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PVC pipe generator
Supply List
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Scrap Wood----Free
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Dowel Rods----Free
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Balsa Wood----$4.86
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Magnets----$5.99
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Copper Wiring----$11.99
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Styrofoam Circle----$1.89
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Wood Glue----Free
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Electric Tape----Free
Design / Construction
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Constructed generator using particle board, copper
wire, and magnets
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Placed a dowel rod through the center of the
generator, and than placed the magnets on top of the
rod with spacers
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Constructed a wooden frame from scrap wood to
hold the dowel rod in place
Constructed an axel with 5 balsa
wooded fan blades, attached them
to a circular Styrofoam
centerpiece, and attached to the
wooden frame
Calculations
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Velocity = (16π) / .2sec
= 251.327 in/sec
Acceleration = 251.327 / 1sec
= 251.327 in/sec²
= 6.382 m/sec²
F = (.35kg)(6.382 m/sec²) = 2.2343 N
P = (Fd)/t
= [(2.2343 N)(16π/39.37)] / (1sec)
= 2.8526 W
Produces
.5V = J/C
U = ½CV²
= ½(3.6 C)(.5)²
= .45 J actual
U = 2.8526 = ½(3.6)(V)²
V possible = 1.259V
Mass of Fan = 35 grams
Radius = 8 inches
Circumference = 16π
1 meter = 39.37 inches
Ferrite magnet
Charge on the magnet: 3.6C
.5V x 100 = efficiency
1.259
40% = EFFICIENCY
Problems
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Generator:
◦ Initially used PVC pipe: too thick.
◦ Magnet spinning wrong direction.
◦ Dimension adjustments due to
friction within generator box.
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Windmill:
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Fan blades breaking.
Styrofoam unstable.
Issues with fan blades staying put.
Not producing enough voltage to light bulb
Solutions:
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Consulted as a team when problems happened to figure out solutions
Remade generator box
Double glued the fan blades on
Continually tested until we achieved the desired outcome
Final Design