Grab and Go Electricity Once You Pop, the Fun Don’t Stop Sean Meek Chris Jones Kyle Johnson

Summary Goal: Build generator converting wind energy to electricity Parts: Total cost: ~$20 Scrap wood “Pringles” Can(s) Magnetic Wire Magnets

Generator

Problems Frequent problems with friction Difficulty in axis turning and staying in place without too much friction Fixed problem by filing axis to a point on the bottom, replacing the contact point with metal and removing the wooden piece that held it in place

Calculations P = (1/2)pAv3 P= power (W) p = air density (kg/m3) A = area of fan (m2) V = wind velocity (m/s2) Ptheo = (1/2)(1.225 kg/m3)(0.0189 m2)(1.7 m/s2)3 Ptheo = 0.0568 W

Calculations (continued) Voltageactual = 0.9 Volts Pact = 0.01 W Efficiency = Pact/Ptheo E =(0.01 W)/ (0.0568 W) E = .1758 = 17.6%

Conclusion Goal reached What we learned: Requirements met How to work in a group effectively How to apply concepts from EF 152