Green Energy From Beneath The Waves

An underwater generator developed by a Maine firm was tested on riverbeds and the seafloor. Ocean Renewable Power Company

Tidal Turbines: New Sparks Of Hope For Green Energy From Beneath The Waves -- Christian Science Monitor

After decades of abandoned plans and crushed prototypes, tidal powers finds new footing off the shores of Eastport, Maine.

Eastport is used to being on the fringe of things – the easternmost city in the United States, a remote outpost of Maine's poorest county, and one of the westernmost communities of the Bay of Fundy, home to the world's most dramatic tidal swings.

But in recent years, this community of 1,600 has found itself at the center of an industrial enterprise that its people thought had abandoned them for good: harnessing the tides to generate electricity. Amid Eastport's abandoned sardine factories and often-empty storefronts, engineers have been testing a new generation of tidal turbines that could power the region's homes and businesses without having an adverse effect on the environment, fisheries, or the beautiful views of the forested islands of neighboring Canada.

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My Comment: Every little bit helps.

Islay To Be Entirely Powered By tides

Philip Maxwell, chairman of the Islay Energy Trust, by the Sound of Islay where the ScottishPower turbines will be sited. Photograph: Murdo MacLeod/Murdo MacLeod

From The Guardian:

Exclusive: ScottishPower is to build turbines in the Sound of Islay that will generate enough electricity for the island's 3,500 inhabitants – and its famous distilleries.

ScottishPower is planning a tidal energy project that will supply all the electricity for one of Scotland's most famous islands, the Guardian can reveal.

The company is close to signing a supply contract with Diageo, the drinks group, to provide electricity from the project to eight distilleries and maltings on Islay – including the makers of the renowned Laphroaig and Lagavulin whiskies.

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Rival Designs Race To Harness Ocean Energy

Photo: SeaGen was installed in the tidal currents of Strangford Lough, Northern Ireland in 2008. However, there is a suite of rival designs racing to harness ocean energy (Image: SeaGen / David Erwin)

From New Scientist:

A bout of gawky prototypes have taken to the water for the first time in recent weeks, signalling a new assault on a decades-old problem: how to generate power from the oceans.

While most wind turbines look much the same, the contest to tap that power is more like wacky races than Formula 1. A suite of varied designs are under development in an attempt to work out the most efficient way to generate juice in the harsh chemical and physical environment of the waves and tides.

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Sea 'Snake' Generates Electricity With Every Wave

From The New Scientist:

Anaconda, a giant rubber "snake" that floats offshore and converts wave energy to electricity, is a step closer to commercialisation. An 8-metre long, 1/25th scale version is currently undergoing tests in a large wave tank in Gosport, UK, and a full-size working version could be a reality in five years.

Harnessing the power of waves is an attractive proposition because they are much more energy dense than wind. But wave power remains the poor relation of the renewable energy sector due to the difficulties of cheaply operating machinery in the harsh marine environment. The world's first commercial wave farm only began operating last year, off the northern coast of Portugal.

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Ocean Power Surges Forward

Photo: Courtesy of Ocean Power Technologies Inc

From The Christian Science Monitor:

Wave power and tidal power are still experimental, but may be little more than five years away from commercial development.

Three miles off the craggy, wave-crashing coastline near Humboldt Bay, Calif., deep ocean swells roll through a swath of ocean that is soon to be the site of the nation’s first major wave-power project.

Like other renewable energy technology, ocean power generated by waves, tidal currents, or steady offshore winds has been considered full of promise yet perennially years from reaching full-blown commercial development.

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