30 Nov '12, 9am

Device converts railway track vibrations into energy.

The device, created by a team from New York's Stony Brook University, works by converting the irregular, oscillatory motion of train-induced railway vibrations into regular, unidirectional motion, in the same way that an electric voltage rectifier converts AC voltage into DC. Professor Lei Zuo and graduate students Teng Lin and John Wang, from the university's Department of Mechanical Engineering, believe the invention could save more than $10million (approx £62m) in track-side power supply costs for railways in New York State alone, along with a reduction of 3000 tons per year of CO2 . "Our invention can harness 200W of electric energy from train-induced track deflections to power track-side electrical devices such as the signal lights, cross gates, track switches and monitoring sensors," noted Professor Zuo. "By using two one-way clutches, the mechanical motion rectifier...

Full article: http://www.eurekamagazine.co.uk/design-engineering-news/d...

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