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Electro mechanical Energy Harvesting. Weekly Meeting 5 October 7 th , 2013. Goals. Get more info on PDR Contact Boon Edam Contact Profs. Soules or Looze Investigate bike hub generators Investigate hand crank generators Hourly Storage of caps. PDR.
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Electromechanical Energy Harvesting Weekly Meeting 5 October 7th, 2013
Goals • Get more info on PDR • Contact Boon Edam • Contact Profs. Soules or Looze • Investigate bike hub generators • Investigate hand crank generators • Hourly Storage of caps October 7, 2013 2
PDR • Not required this semester per Prof Hollot • Did not create a preliminary outline after we learned this • Instead, focused efforts on Spec/Concept Summary October 7, 2013
Contacts • Boon Edam: contacted using their website, no response yet • asked about generator, caps, gear ratios • Prof Soules: email sent this weekend about supercaps/motors October 7, 2013
Bike Hub Generator • Found regulator schematics • Constant rotation to charge batteries • Some power lights • Very low power captured • 93 Years to pay for itself @ 1Hr/Day • $300 - $400 • Vague cross section images online October 7, 2013
Hand Crank Generator • Crank turns multi gear arrangement • DC motor used • Rectified, regulated for Li battery • Powers LEDs October 7, 2013
Cap Energy Storage • W = (½) C V2 • 80 joules maximum energy put into the bars • Assuming 100% efficiency, 2.3V cap: • 6800F needed per hour of 5W consumption • 30x 100mW LEDS + 2W power meter = 5W October 7, 2013
General • Flywheel idea • Fluxxlab Dynamo Door • Power meter circuit should be added • Getting a 100F cap and low forward voltage diodes this weekend • Going to design a circuit soon to rectify, regulate, charge caps • Motor ordered • 5W, 550mA max, 5V at 1400 RPM • Est. arrival date: 10/12-10/19 October 7, 2013