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Our Christmahanakwanzika Windmill Presentation

Our Christmahanakwanzika Windmill Presentation. Team Members. Sasha Clark Ilona Molotoka Alexandria Butler Shanel Crawford-Harris. Device Design. Generator. Base Dowel Rod. Windmill. How it works?.

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Our Christmahanakwanzika Windmill Presentation

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  1. Our Christmahanakwanzika Windmill Presentation

  2. Team Members Sasha Clark Ilona Molotoka Alexandria Butler Shanel Crawford-Harris

  3. Device Design Generator Base Dowel Rod Windmill

  4. How it works? • Our generator creates an electromotive force (emf) which calculates the energy gained per unit of charge in volts. • The magnets inside the generator creates a magnetic field. • The fan spins our windmill, therefore rotating our magnet to create an induced current which will hopefully light our light bulb. • The mechanical energy is converted to electrical energy.

  5. Calculations… P=½APv^3 Velocity = 8 m/s ρ is the density of air, which is 1 kg/m3. Area of one blade:((length of one blade)^2)*π. Length of one blade: 7.25 in = .184 m Using that equation and our results, we get: P=½ (kg/m^3)(.184m)^2(π)(8m/s)^3= 27.23 W • That value is the ideal power from the air going into the generator in a perfect system, our actual power is much lower, because energy is lost due to friction. • The voltage and resistance of the generator: P=v^2/R P=(.3)^2/45.7=.00196watts • Efficiency = Power (Actual)/Power (input)=(.00196/27.23)*100=.007% • The generator works through electromagnetic induction. By spinning the magnet, we change magnetic field which induced a voltage in the coil.

  6. The Building Process

  7. Construction issues • Propellers did not work at a constant velocity. • Base rod broke. • Weak magnet. • Magnets bumping the inside of the box.

  8. Conclusion This project helped us: • Understand and apply the concepts of electricity, wind speed, and power. • Use alternative resources to help build our project successfully. • Work together as a team towards a common goal.

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