MAD16001003

MAD16001003 photos on flickr MAD16001003 videos on you tube

Our Design Madonna design, Made of paper plates, it evolved into a multi-cup design with 4 cups in the end. Our Experiment initial mA readings were 0.37, 0.45, 0.2, 0.4 but later we got the following Results Reading 1 Current [ 5.6] mA Reading 2 Current [ 5.2] mA Reading 3 Current [ 5.8] mA Reading 4 Current [ 5.2] mA Average Current = [ 5.4] mA Windspeed at fan = [ 4.7 ] ms-1 Resistance = [100 ] Ohms Power = I * I * R (remember to convert mA to A) = 0.00291 Watts So with a windspeed of [4.7 ] our turbine generates an average current of [5.4 ] mA delivering [2.91] mW per second so in 10 minutes it could generate [2.91 * 600 ] mW. = 1746 mW If playing music on an iPod classic consumes about 77mW per second, 10 minutes of turbine time (assuming 100% energy transfer efficiency) can power [ 1746/77 = 22.67 ] seconds of playback time, enough to listen to about [ 0.126 ] 3 minute songs. Thoughts Why do wind turbines need to be so big to generate decent amounts of energy?