Generating Electricity by Going With the Tidal Flow

By: EW News Desk Team   Date: 4 May 2010

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EW News Desk Team

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04 May 2010

Several start-up companies in the United States are developing technology to produce electricity from strong tidal currents.

Ocean Renewable Power’s system uses a cross-flow turbine that spins as the water flows through it, turning a generator.

Several start-up companies in the United States are developing technology to produce electricity from strong tidal currents.

Ocean Renewable Power’s system uses a cross-flow turbine that spins as the water flows through it, turning a generator.

The turbine will operate with water flowing in either direction, depending on whether the tide is flowing in or out.

Each section of the turbine has four helical blades, or foils, made from composite materials that resist corrosion in salt water, according to this fascinating item in the New York Times.

Each foil has a leading and trailing edge. When the leading edge faces the flowing water, a force is created that moves the turbines.

Because of the helical shape, the turbine is rotating constantly.

 


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