Frayne’s device consists of a flat, taut membrane that flutters within its housing as air passes through it. At each end of the membrane are magnets that oscillate between metal coils as the band flutters, effectively creating an electric charge. According to the 28-year-old Frayne, prototypes of the Windbelt have generated 40 milliwatts in 10-mph slivers of wind, making his device 10 to 30 times as efficient as the best microturbines.
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Frayne, now based in Mountain View, Calif., gathered a variety of lessons while studying at MIT, especially under the tutelage of Amy Smith (a 2004 MacArthur fellow) in her “D-Lab” class. In this design lab, Frayne learned the politics of delivering technology to poor nations, as well as the technical aspects of mechanical engineering.