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Wales has laid down the gauntlet to Scotland and Northern Ireland in the race to develop tidal energy technology. Last week, Cardiff-based Tidal Energy Limited (TEL) announced plans for a 1MW trial installation at the Ramsey Sound in Pembrokeshire, South Wales. The company hopes its DeltaStream horizontal turbines will be in the water by summer 2010, making them Wales' first signifcant tidal install. TEL says its 12-month test project will use technology that's proven to be grid-compliant, enabling it to connect to the national grid and earn an income from generated power.

The Guardian has a report on some new tidal power technology from a company in Wales inspired by ship propellers and wind turbines - Tidal power gets a boost from propeller and wind turbine techonology. Propellers on ships have been tried and tested for centuries in the rough and unforgiving environment of the sea: now this long-proven technology will be used in reverse to harness clean energy from the UK's powerful tides. The tides that surge around the UK's coasts could provide up to a quarter of the nation's electricity, without any carbon emissions. But life in the stormy seas is harsh and existing equipment - long-bladed underwater wind turbines - is prone to failure.A Welsh renewable energy company has teamed up with ship propulsion experts to design a new marine turbine which they believe is far more robust.

Russia's biggest hydro-power generator Rushydro is considering a four billion RUB investment in a tidal power plant in Murmansk Oblast, on the coast of the Barents Sea. The project plans could make the Kola Peninsula a leading Russian region on alternative energy. Rushydro now confirms that it is about to complete a feasibility study of the project and that the construction of the plant could eventually start next year, Murman.ru reports. The plant project is named the Northern Tidal Power Plant, and is to be built in the the Dolgaya-Vostochnaya Bay west of the Murmansk city.

CleanTechnica has a post from San Francisco mayor Gavin Newsom on the city's proposal to build a wave power plant offshore - Wave Energy to Bring Power and Jobs to San Francisco. Today, San Francisco took a meaningful step toward turning the promise of renewable ocean energy into reality. We submitted a preliminary permit application to the federal government to develop a wave power project off our coast that we believe can generate between 10 to 30 megawatts of energy, with potential of up to 100 megawatts. When this project is fully operational, upwards of 100 jobs could be created in San Francisco. Ocean power is a true "game changer" in the area of renewable energy. When wave and tidal power technologies reach commercial scale, they are expected to be able to provide thousands of megawatts of power to our coastal communities, dramatically green our energy portfolios and create thousands of new American jobs. In San Francisco, we've been doing our part to spur these technologies by aggressively advancing tidal and wave power pilot projects. We are 100% committed to this challenge. Wave power is not a new concept. In 1887, San Francisco Mayor Adolph Sutro recognized the power of San Francisco's waves and built a wave catch-basin to harness the ocean's power. Over the next century wave power development took a backseat to our dependence on oil, with oil platforms built along our coasts to feed our oil addiction.

"The world's largest tidal power station will be constructed off the coast of Incheon. GS Engineering and Construction signed a memorandum of understanding with state-run Korea Hydro and Nuclear Power (KHNP) on Wednesday and will begin construction later next year with a view to completion around 2017. The power station will have a capacity of 1.32 million kw/h, surpassing the 1 million kw/h of a nuclear reactor being constructed in Ulsan and 3.4 times greater than the capacity of the Rance Tidal Power Station in France, currently the world's largest. It will generate 2.41 billion kw per year, the equivalent of 60 percent of Incheon's household electricity consumption."

Plans to develop the world's largest tidal power project off the coast of Scotland and Northern Ireland have been unveiled today by ScottishPower. Three sites will initially be developed with a combined outpout of 60MW. Two of the sites are in Scotland in the Pentland Firth and the Sound of Islay, with the third off the North Antrim coast in Northern Ireland. The projects will use the Lànstrøm tidal turbine d

Atlantic Canada's Bay of Fundy has some of the world's highest and most powerful tides. Every day, 100 billion tonnes of seawater surge in and out of the bay - a perfect source of clean, reusable alternative energy, if it can be properly harnessed. Tidal power isn't new, of course; small grain mills were powered by tides in Europe centuries ago. But tapping into the reliable, natural ebb-and-flow of water to generate electricity didn't begin until the 1960s.

A major tidal energy project is being planned for waters off the coast of Northern Ireland and Scotland. ScottishPower has identified sites off the Antrim Coast, Pentland Firth and the Sound of Islay to test sea turbines which could power thousands of homes. They have been working on the Lanstrom device, which is said to be one of the world's most advanced tidal turbine.

An underwater turbine that generates electricity from tidal streams was plugged into the UK's national grid today. It marks the first time a commercial-scale underwater turbine has fed power into the network and the start of a new source of renewable energy for the UK.

The Scottish Government has created one of the biggest international innovation prizes in history - a £10 million challenge for advances in wave and tidal energy. At a ceremony this week in historic Edinburgh Castle, details of the 'Saltire Prize' were revealed to leading scientists, environmentalists and potential entrants after being finalised by a panel of international experts who comprise the prize Challenge Committee. Dr Anne Glover, Scotland's Chief Scientific Adviser and Chair of the Challenge Committee, said the Saltire Prize will be awarded to the team that can demonstrate in Scottish waters a commercially viable wave or tidal energy technology that achieves a minimum electrical output of 100GWh over a continuous two year period using only the power of the sea and is judged to be the best overall technology after consideration of cost, environmental sustainability and safety.

The (UK) Telegraph has an article on the Vivace tidal / current power device I mentioned recently - Ocean currents can power the world, say scientists The technology can generate electricity in water flowing at a rate of less than one knot - about one mile an hour - meaning it could operate on most waterways and sea beds around the globe. Existing technologies which use water power, relying on the action of waves, tides or faster currents created by dams, are far more limited in where they can be used, and also cause greater obstructions when they are built in rivers or the sea. Turbines and water mills need an average current of five or six knots to operate efficiently, while most of the earth's currents are slower than three knots.

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.

As a largely unexplored renewable source, marine and hydrokinetic energy - or ocean power - is gaining traction as the next best thing in the power industry.