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news.com: by Michael Kanellos

MENLO PARK, Calif.–Back and forth, back and forth. That’s the idea behind WaveRoller. The company, based in Espoo, Finland, says it has devised a way to generate electricity from waves without buoys or other floating devices, the mainstay of other wave power companies.

Instead, the company wants to plant oscillating fiberglass/steel plates on the sea bed. Waves rolling in push over the plates, which rebound after the wave passes to only be knocked down by another wave. The back-and-forth motion of the plates drives a piston and creates hydraulic pressure. The pressure ultimately gets fed to a turbine to generate electricity. [ read more ]