Web Directory - All Sites Sorted » Renewable Energy » Tidal Energy

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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Latest News

Lowestoft: 4Nrg tidal device on Energy Innovation Awards shortlist - East Anglian Daily Times East Anglian Daily Times Lowestoft: 4Nrg tidal device on Energy Innovation Awards shortlist East Anglian Daily Times A TIDAL energy device developed in Suffolk is among eight schemes in contention for the 2012 Energy Innovation Awards, being staged by the East of England Energy Group later this month. To send a link to this page to a friend, simply enter their email ... and more » Wed, 08 Feb 2012 15:56:02 GMT

Offshore renewable energy planning system to be streamlined - BBC News BBC News Offshore renewable energy planning system to be streamlined BBC News The director of policy at Scottish Renewables, Jenny Hogan, said: "With more than 11 gigawatts of offshore wind, wave and tidal energy projects in the pipeline by 2020, a streamlined and efficient process for securing planning consent is crucial to ... Scotland releases blueprint for offshore renewable energy roll-outClick Green Offshore energy 'needs efficiency'The Press Association Scotland's Offshore Renewable Energy BlueprintEnergy Digital reNews Europe -Scotsman all 65 news articles » Wed, 08 Feb 2012 15:23:26 GMT

UK: Wind Energy Industry gets heavyweight political backing - REVE Electric.co.uk UK: Wind Energy Industry gets heavyweight political backing REVE New Energy Secretary's priorities: Green jobs, green growth. RenewableUK: Government standing shoulder to shoulder with us. RenewableUK, the trade association representing wind power, wave energy and tidal energy industries, has welcomed comments by ... New energy secretary confirms green targetsReuters UK New Energy and Climate Change Secretary Talks Green GrowthElectric.co.uk Ed Davey, New Energy Secretary, To Set Out His Green CredentialsHuffington Post UK HeatingandVentilation.net -Energy and Environmental Management (EAEM) Magazine all 380 news articles » Wed, 08 Feb 2012 10:16:00 GMT

Marine and Hydrokinetic Power Generation Installed Capacity to Increase ... - MarketWatch (press release) Marine and Hydrokinetic Power Generation Installed Capacity to Increase ... MarketWatch (press release) "Although wave energy has received the most press coverage, our research shows that tidal energy is shaping up to be the lower cost option, and therefore the closest to large-scale deployment." By 2017, Pike Research forecasts, worldwide tidal stream ... and more » Wed, 08 Feb 2012 10:00:43 GMT

The Energy Mix that will help us Survive without Fossil Fuels - OilPrice.com The Energy Mix that will help us Survive without Fossil Fuels OilPrice.com Tidal Power: Restricted to select coastal locations, tidal will never be a large contributor on the global scale. The resource is intermittent on daily and monthly scales, but in a wholly predictable manner. Extracting tidal energy is not terribly ... and more » Wed, 08 Feb 2012 03:27:19 GMT

'Magic mud' on tidal flats key to shorebird populations - Canada.com 'Magic mud' on tidal flats key to shorebird populations Canada.com It is created by bacteria and diatoms that settle out of seawater and secrete mucus that binds them to the mud so they won't wash away with the tide. The film is composed of mucopolysaccharides, which is an easy-to-digest, high-energy food. and more » Tue, 07 Feb 2012 21:57:27 GMT

Water Turbines Deployed in New York - SmartMeters Water Turbines Deployed in New York SmartMeters The deployment, part of the Roosevelt Island Tidal Energy project, is led by Verdant Power and is the first commercially licensed tidal energy project in the United States. The turbines are scheduled to be fully installed by 2015 and will use the flow ... Tue, 07 Feb 2012 20:01:00 GMT

Wind energy group claims widespread public support - Cumnock Chronicle Daily Mail Wind energy group claims widespread public support Cumnock Chronicle RenewableUK, the trade association representing the wind, wave and tidal industry, has welcomed the Prime Minister's public vote of confidence in wind energy, following the publication of a letter by a group of backbench MPs questioning the value of ... Why Tory MPs opposition to wind power will put your energy bill upThe Guardian (blog) Conservative hostility to wind subsidies "highlights challenges" for new ...Out-Law.com Lib Dem leadership hits back as Tory MPs declare war on wind farmsBusiness Green all 240 news articles » Tue, 07 Feb 2012 09:33:25 GMT

This big step forward for tidal energy could bode well for similar ... - Wicked Local (blog) Greentech Media (blog) This big step forward for tidal energy could bode well for similar ... Wicked Local (blog) 23, Verdant Power received the country's first commercial license for a tidal electric plant from the Federal Energy Regulatory Commission. Verdant had been testing prototypes in the East River, near its office on Roosevelt Island, for the past several ... Dream of tapping tides as energy resource lives onTheDay.com Can The East River Power New York City?AOL Energy FERC issues first pilot license for tidal power project in New YorkPennEnergy- Energy News (press release) Greentech Media (blog) all 9 news articles » Sun, 29 Jan 2012 19:06:46 GMT

Tidal-Energy Project in New York's East River Wins License - Bloomberg Bloomberg Tidal-Energy Project in New York's East River Wins License Bloomberg Enlarge image Tidal-Energy Project in New York's East River Wins License Tidal-Energy Project in New York's East River Wins License Verdant Power Inc via Bloomberg Free Flow System turbines being transported to RITE Project site in New York, Sept. Energy Turbines May Be Spinning in New York's East River by 2013BusinessWeek New York East River Home To New Tidal Energy ProjectCleanTechnica Federal Energy Regulatory Commission Issues First Tidal Power Project LicenseAltEnergyMag (press release) Greentech Media (blog) -Utility Products -Energy Efficiency News all 37 news articles » Mon, 23 Jan 2012 22:51:59 GMT

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