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Extreme Tech: It Came From the Sea--Renewable Energy, That Is

Posted March 11, 2008 8:49 AM

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.

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Power-User

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#1

Re: Extreme Tech: It Came From the Sea--Renewable Energy, That Is

03/11/2008 11:37 PM

cute but they should have just used reversing pitch blades which would have kept the turbines spinning in the same direction regardless of which direction the water was flowing and removed the need to spin the entire structure and linkages.

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#2

Re: Extreme Tech: It Came From the Sea--Renewable Energy, That Is

03/12/2008 12:58 AM

They produced 50,000kWhr over 6 months, that's equivalent to an 11kW alternator. Unlikely to power much of Manhattan. ffeJ

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#4
In reply to #2

Re: Extreme Tech: It Came From the Sea--Renewable Energy, That Is

03/12/2008 3:04 PM

From small acorns do large oak trees grow! There's no point in building a machine like that out in the deep sea without testing a smaller, easily accessible one near to home! Find it's weaknesses, tweak it, play with the design a bit and Bobs ya uncle!

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#6
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Re: Extreme Tech: It Came From the Sea--Renewable Energy, That Is

03/20/2008 3:02 AM

I don't know the actual date or the power output, but the USS Enterprise (CVN 65) was docked in New York harbor sometime in the late 80's. A major power outage occured, I'm not sure why, but it was catastrophic to the area. Anyway, the Enterprise was hooked to the grid and powered several cities in the area while on "standby". The Enterprise didn't even have to strain to do so. Power Manhattan, power New York State...couple hundred pounds of Uranium...and no one died...just another wondering mind.

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Power-User

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#3

Re: Extreme Tech: It Came From the Sea--Renewable Energy, That Is

03/12/2008 2:42 AM

The question is, what exactly is it powering now ?

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Power-User

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#5
In reply to #3

Re: Extreme Tech: It Came From the Sea--Renewable Energy, That Is

03/12/2008 4:00 PM

I think it was being used to power Spitzer's Hooker obsession, but I could be wrong :P

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