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Pelarmis
A 'Pelarmis' wave generator consisting of four tubular cylinders connected end to end floats on the ocean surface (looks like a worm 160 meters long.)
Wave induced motion is resisted by hydraulic rams which pump oil into a smoothing accumulator. The latter drains into a hydraulic motor coupled to an electric generator, 75 kW per Pelarmis.
A 40 unit wave farm in the Orkneys (Scotland) will provide up to 3 MW. A larger 20 MW wave farm is being built off Portugal. The long term idea is to expand to 550 MW from wave power off the Portuguese coast.
