23 Mar '12, 7pm

Hydropower's Devices Beyond Dams via @reworld

Several kinds of devices can generate electricity from wave energy and in most cases, undersea power cables carry the energy to shore. A point absorber is a floating device with parts that move relative to each other in response to wave motion and can use hydraulic, pneumatic or direct-drive systems. A direct-drive permanent-magnet generator device built by Columbia Power Technologies (CPT) , located in Virginia, is an example. Built of fiber-reinforced plastic that doesn’t corrode in harsh sea conditions, CPT’s prototype SeaRay is designed to work with the least number of moving parts, thereby increasing efficiency and reducing the chance of parts that can break, according to CEO Reenst Lesemann. “In its simplest form, there are two wings, forward and aft, and a cell in between. Each wing is directly connected to a generator. Each wing and cell move independently of each ...

Full article: http://www.renewableenergyworld.com/rea/news/article/2012...

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#Hydropower's Devices Beyond Dams

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