Location: Logan HS
Time: 4:30-7:00 PM
Students: Dale, Thomas, Seth, Tanner, Avery and Paige
Goal: Look at math calculations on the efficiency of Piezo and electromechanical.
Mr. Foye was our guest speaker and had a number of spreadsheets to look at the differences in electrical output for piezo and electromechanical.
Some assumptions were made based on averages. We decided our target goal was 13.5 KJ for a battery recharge. We based this on 15,000 KJ per day total body energy consumption and 15 KJ would be used walking. We also assumed the average person uses their legs (movement) 2 hours per day.
Based on the data Piezo is not going to be a good choice for our solution. The output of the elements will be too low.
We then looked at electromechanical using motors to generate electricity and using gearing to improve the output. Students used multimeters to test different motor outputs with varying success. This proved to be more effective and we further discussed some solutions we could incorporate.
We will have to test the motors for K factor which is volts per RPM.
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| Sketch Idea #1 |
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| Sketch Idea #2 |
Students testing motor outputs to use as possible generators.
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