|
From Scientific American:
Thirty feet (nine meters) below Manhattan's East River, next to Roosevelt Island, six turbines--each 16 feet (five meters) in diameter, churning at a peak rate of 32 revolutions per minute--stand at attention on the riverbed. The turbines--which belong to New York City-based Verdant Power, Inc., --are built on a swiveling platform that keeps their nose cones facing the tide, whether it's coming in or going out. Resembling an underwater wind farm, these kinetic hydropower systems use gearboxes and speed increasers--which convert the slower rotating rotor into a faster rotating generator--to transform each turbine's mechanical power into electricity.
Read the whole article
|