Bike Power

Designer Chiyu Chen has thougth up an urban bike sharing program that would pay its riders for accumulating kinetic energy during their travels and plug that energy back into an electric grid. He has set up a system that normally powers bicycle headlights to only run when the brakes are applied.  The power generated from braking would be stored in the bike and collected at the bike station, adding credit to the bikers "costumer card."

The concept is "much like the Toyota Prius’s, only miniaturized (and, yes, monetized). He’s increased the output of a standard Sturmey-Archer dynamo hub (commonly used to power bicycle headlights), set the more powerful dynamo to only kick in when the brake is engaged, and added an ultracapacitor to store the accumulated kinetic energy while the bike’s out and about."