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Underwater ‘kite’ captures tidal energy
‘Deep Green’ can generate enough power for home refrigerator for a year
By Emily Laut
updated 3:45 p.m. ET, Mon., May 10, 2010
A small "kite" that's flown under water is boldly going where no tidal turbine has gone before.
“Deep Green” looks like someone’s flying kites from the sea floor. With its 39-foot wingspan and 328-foot cable tethering it to the ocean floor, all it’s missing is a colorful tail.
Though a nearly 40-foot wingspan may seem big, the kites are small compared to other tidal energy designs. That’s one of the big advantages to Deep Green: it can operate at greater depths, where currents are slower.