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Tidal Energy Directory: This is the Tidal Energy directory of All Sites Sorted, and is a subsection of the Renewable Energy Source Directory providing access to renewable tidal energy websites and resources. Tidal energy, also called tidal power, provides a vast potential for renewable electric power generation and industrial energy supply. Like solar and wind power, Tidal Energy is geography dependent – relying of course on proximity to ocean shores. Not all ocean shore locations are equal for tidal energy supply – since certain shore locations provide relatively high variances between high and low tides whereas other shore locations provide relatively low variance between tidal levels. The high variance locations have the greatest potential for tidal energy supply, namely the potential energy released from the difference between high tide levels and low tide levels.

Low Tide versus High Tide = Tidal Energy

Other sources of tidal energy or power are oceanic currents, captured by turbines driven by currents passing the fixed turbine intake location.

Tides are generated by endless cycles of the rotation of the moon about the Earth, resulting in an almost limitless supply of energy. This is because the motion of the moon is unaffected by the harnessing of tides for power generation.

Ocean dams and barrages are used to harness the tidal energy. The efficiency of such ocean dams is proportional to the tidal swell, i.e. the difference between the high and low tide marks. These heights can be substantial, particularly in bays, and areas where tides must funnel into narrow gaps, such as in some river mouths and fjords. In a renowned example, average tidal amplitudes in the Bay of Fundy, Canada exceed 15 meters.

Because tidal energy generation is proportional to height, selection of the locations of the tidal power generator is important – namely where such high tidal amplitudes can be harnessed. Drawbacks of tidal energy generations include time dependency upon times of tidal flow and susceptibility of machine components to corrosion and degradation in high salinity environments found in ocean locations.

In often simplified terms, any place where the tide builds up in a good height differential and a significant flow, the water flow can be harnessed for power generation. One solution is building a dam or barrage dam across a bay openeing - with gates that open to allow the incoming tides, but close at high tide to direct the outgoing flow to turines. As the tide drops you have a big height difference between inside and outside the dam or barrage - to generate electricity.

The sites listed below focus on tidal energy and tidal power research, products, technology and business.

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Early tidal power test in Eastport called a success - Bangor Daily News EarthTechling (blog) Early tidal power test in Eastport called a success Bangor Daily News 18, a tidal energy generator developed by Ocean Renewable Power Co. has been producing clean, grid-compatible power for the Coast Guard boat. ... Maine Highlights Tidal Power Generation Project In EastportGov Monitor Coast Guard crews change tide of energy consumptionMarine Log Maine Tide Power Experiment SuccessfulEarthTechling (blog) AZoCleantech -WIS -BusinessWeek all 58 news articles » Wed, 25 Aug 2010 01:14:07 GMT+00:00

Scottish firm BiFab wins £4m contract to build prototype tidal energy turbine - The Guardian The Guardian Scottish firm BiFab wins £4m contract to build prototype tidal energy turbine The Guardian A Scottish company has won the contract to build one of the world's most advanced tidal energy turbines. The contract could kickstart a marine energy ... Scottish Firm BiFab Wins New Contract to Build Prototype Tidal Energy TurbineElectric.co.uk £4m tidal energy contract awarded to Scottish firmEnergy Efficiency News Islay first island in world to be tidal poweredHerald Scotland Business7 -New Energy Focus -EnergyBoom all 54 news articles » Tue, 17 Aug 2010 06:01:00 GMT+00:00

Prince of Tides: A Mammoth Turbine - New York Times (blog) New York Times (blog) Prince of Tides: A Mammoth Turbine New York Times (blog) Tidal energy has other benefits: as turbines are placed underwater, they are silent and out of sight. And many tidal inlets with significant energy ... Unveiling of largest tidal deviceBBC News AK-1000 tidal energy turbine could be the world's largestUberGizmo (blog) S'pore firm makes waves in tidal energyeco-business.com EcoGeek -Recharge -EcoSeed (blog) all 64 news articles » Fri, 13 Aug 2010 17:51:56 GMT+00:00

Could tidal power play an important role in future energy saving projects? - Energy Saving Trust Could tidal power play an important role in future energy saving projects? Energy Saving Trust This means large quantities of tidal energy can be produced without disturbing communities, whereas onshore wind power schemes frequently face opposition ... Wed, 01 Sep 2010 08:58:00 GMT+00:00

Maine offshore energy project exceeds expectations - CNET (blog) CNET (blog) Maine offshore energy project exceeds expectations CNET (blog) The area is an ideal spot for harnessing tidal energy since it has extremely strong tidal currents. The company is in the process of obtaining licenses for ... Ocean Renewable Power Tests Tidal Power System in MaineReuters ORPC Develops Tidal Energy System in MaineAZoCleantech Underwater turbine on track for '11Journal Record (subscription) WBZ all 20 news articles » Thu, 19 Aug 2010 18:45:08 GMT+00:00

Tidal energy spinout secures multi-million pound funding deal - Business7 Tidal energy spinout secures multi-million pound funding deal Business7 Scottish tidal energy developer Nautricity has successfully completed its first multi-million pound investment round. The deal has seen First Tech, ... and more » Thu, 02 Sep 2010 12:35:49 GMT+00:00

Tidal Power to Play Big Role in Future Energy Projects - Electric.co.uk Tidal Power to Play Big Role in Future Energy Projects Electric.co.uk This means that large quantities of tidal energy machines can be made without disturbing communities. However, on shore wind power schemes frequently face ... Thu, 02 Sep 2010 08:57:14 GMT+00:00

Maine PUC seeks offshore wind and tidal energy proposals - Recharge Recharge Maine PUC seeks offshore wind and tidal energy proposals Recharge The Maine Public Utilities Commission (PUC) today issued a request for proposals for a maximum 30MW deepwater offshore wind and tidal renewable energy ... and more » Wed, 01 Sep 2010 21:07:25 GMT+00:00

Grays Harbor, Pacific County explore tidal energy - Seattle Post Intelligencer Grays Harbor, Pacific County explore tidal energy Seattle Post Intelligencer The Grays Harbor and Pacific County public utility districts are exploring a pilot project to harness tidal energy in Willapa Bay. The Aberdeen Daily World ... and more » Wed, 25 Aug 2010 23:01:11 GMT+00:00

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