Directory:Tidal Power

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Directory of Resources Regarding Tidal Power

See also: PowerPedia:Tidal Power at PESWiki


Harnessing the in and out fluctuations of tidal waters. Covering everything from research and development to commercial applications worldwide.

Since at least 1958, man has been harnessing the power of tides to produce electricity. But harnessing tide power has been ongoing since prehistoric times.

Table of contents
1 Overviews
2 Technologies
3 Other Instances of Tidal Power
4 In the News
5 Backing
6 Skeptics
7 Directories
8 See also
[edit]

Overviews

  • Ocean Energy Report for 2005 (http://renewableenergyaccess.com/rea/news/story?id=41396) - "Without a doubt, ocean energy made a splash in 2005. But in 2006, here's hoping for a tidal wave." -- Carolyn Elefant, OREC. (Renewable Energy Access; Jan. 9, 2006)
  • WorldEnergy.org (http://www.worldenergy.org/wec-geis/publications/reports/ser/tide/tide.asp) - Gives one of the best reports on current and planned tide power projects around the world, beginning as early as 1958.
  • Northern Tidal Flows: Reliable New Power Source for Quebec? (http://pesn.com/2006/08/14/9500297_Quebec_tidal/) - This proposal involves tapping the lunar orbit, one of the largest “wheelworks of nature‿ to which humanity has access. Distance and climate challenges are obstacles, along with politics, cost and choice of transmission technology. (PESN; Aug. 14, 2006)
  • A Rising Wave of Tidal Power (http://www.cbsnews.com/stories/2006/11/04/business/main2153298.shtml) - A number of companies vie for the best sites to harness energy from flowing water, including that of large rivers. The best sites are under investigation, and companies are staking claims on where best to construct new power plants. (CBS News; Nov. 4)
  • Swell Potential for Maine Ocean Energy (http://www.renewableenergyaccess.com/rea/news/story?id=44931) - A one-year study by the Electric Power Research Institute concluded that Maine's tidal power potential provides an excellent resource that could produce electricity at costs competitive with wind and natural gas, and less expensive than solar and so-called "clean coal." (RenewableEnergyAccess; May 17, 2006)
  • Review by GCK Technology (http://www.gcktechnology.com/GCK/Images/ms0032%20final.pdf) (PDF) - Good report on history of tide power, including prehistoric and middle ages tide wheels (under London Bridge 1580)
  • Martin Berger Reviews Tidal Energy Technology (http://www.pureenergysystems.com/events/conferences/2004/NewEnergyMovement/6900051_MartinBerger_Tidal/index.html) - Speaking at the New Energy Conference in Portland, Sept. 26, 2004, Berger presents an overview of the present state of the technology, including that of his company.
  • Tidal Power for San Francisco (http://thefraserdomain.typepad.com/energy/ocean_power/index.html) - The tides at the Golden Gate offer one of the best locations on the western coast of North America, capable of generating as much as 38 megawatts of power -- enough alternative energy to provide power to nearly 40,000 San Francisco homes. (The Energy Blog; Sept. 23)
[edit]

Technologies

  • Blue Energy - Company now implementing its technology commercially. Turbine design, which acts as a highly efficient underwater vertical-axis windmill, could product energy for as cheaply as two cents per kilowatt hour, well below commercial grid energy wholesale prices today.
  • Underwater Electric Kite (UEK) Corporation - Low impact hydrokinetic turbines harness tide and river flow, without harming aquiatic life, requiring no dam or impoundment. Commercial energy generation cost estimated at between 1.8 and 2.8 cents per kW-h.
  • Tidal and River Turbine by University of Southampton - The University of Southampton's minimalist design significantly reduces the number of moving parts, and is fully assembled prior to installation, reducing costs. Estimates five years to commercialization.
  • Balkee Tide and Wave Electricity Generator - Raj Balkee of Mauritius, has invented an energy conversion device that uses a floating buoy to advance a unidirectional generator, harnessing the up-and-down motion of waves and tide. Seeks participation to further advance the design and project. (PESWiki)
  • 33 foot Underwater Windmill powers 35 homes (http://news.nationalgeographic.com/news/2003/10/1009_031009_moonpower.html) - The tidal turbine is bolted to the floor of the Kvalsund Channel and was connected to the nearby town of Hammerfest's power grid on September 20. It is the first time in the world that electricity directly from a tidal current has been fed into a power grid. (National Geographic; Oct. 2003)
  • Water Wall Turbine - Massive paddle wheel turns close to the speed of the water, not endangering the fish, while efficiently converting tidal flow into electricity. Installation cost in the range of 1000 USD/KW for a 40 MW unit, with 1 year to production. Energy production in range of 3 cents / kW-h. Moving parts are ~4 m above water.
  • ScotRenewables (http://www.scotrenewables.com/marine_tech.html) - Free-floating tidal current energy converter with dual counter-rotating horizontal-axis rotors driving generators within sub-surface nacelles, suspended from a surface buoyancy tube. It is anchored to the seabed via a yoke arrangement and compliant mooring system with a separate flexible power and control umbilical that connects to a subsea junction box.
  • Tidekraft (http://www.e-tidevannsenergi.com/) - Three blade windmills that are relatively easy and inexpensive to produce are adapted to underwater tidal flow with a modular design, allowing all critical components to be lifted out of the water in one operation for maintenance and repair. By rotating the propeller blades around their own axis at slack water when the current turns, the mill is ready for the reversing current.
  • Oscillating Water Column - Technology for harnessing the motion of ocean/sea waves as they push an air pocket up and down behind a breakwater. Wells Turbine inside generates electricity from rotation in the same direction, whether the air is moving forward or backward.
  • Pulse Generation (http://www.pulsegeneration.co.uk/) - Pulse generators cause hydrofoils to oscillate up and down, efficiently taking energy from tidal flows and transmitting it to a generator held above the water, where it is accessible for maintenance. Ideally suited to near-shore, shallow tidal flows, located close to areas of high demand and large scale transmission networks.
  • HydroVenturi (http://www.hydroventuri.com/) - The Rochester Venturi is a pressure amplifier that accelerates tidal flows to create a pressure drop where the flow is most constricted, pulling air from another location into the primary flow. This secondary flow allows generation of electrical power without moving or electrical parts under water, and with minimal frictional losses over large distances.
  • OpenHydro (http://www.openhydro.com/) - The Open-Centre Turbine, with just one moving part and no seals, is a self-contained rotor with a solid state permanent magnet generator encapsulated within the outer rim, minimising maintenance requirements. It is one of the first tidal technologies in the world to reach the stage of permanent grid connected deployment at sea, at the European Marine Energy Centre (http://www.emec.org.uk/view.asp?newsID=19) (EMEC) in Orkney.
  • Crest Energy (http://www.crest-energy.com/) - Plans to generate power for 250,000 New Zealand homes, or 200 MW, by harnessing the power of tidal flows in to and out of the Kaipara Harbour. The project should generate about 4% of New Zealand's electricity supply from 200 turbines.
  • Woodshed Technologies (http://www.woodshedtechnologies.com.au/our_services.html) - Tidal Delay relies on the seawater restraining feature of natural coastal landforms, such as peninsulas or isthmuses, to create a time delay or “phase difference‿ between the two sides. Connections across the landforms with sea-water carrying pipes incorporating a turbine and generator, enables the stored potential energy to be harnessed.
  • Tidal Electric (http://www.tidalelectric.com/) - Tidal lagoons utilise an offshore impoundment structure that looks like a rocky island. The impoundment is fitted with conventional low-head hydroelectric generating equipment and produces predictable power. OFGEM report finds tidal lagoons cheaper than offshore wind.
  • Fieldstone Tidal Energy - Harvests river and tidal energy. "System is capable of producing energy in the megawatt range, and more importantly connects to the grid sychronously; with zero fish kill."
  • SMD Hydrovision (http://www.smdhydrovision.com/products/?id=27) - TidEl tidal stream generator floats and is restrained submerged to the seabed using a mooring arrangement. Generates electricity at prices comparable with wind power.
  • Verdant Power (http://www.verdantpower.com/) - Free-flow turbine that generate utility and village scale electric power from natural underwater currents, which can be found in rivers, tides, oceans, and manmade channels.
  • TidalStream (http://www.tidalstream.co.uk/) - A tidal stream turbine is just like a wind turbine underwater, except that the density of seawater is 800 times greater than air, and flow rates typically one fifth.
  • Marine Current Turbines (http://www.marineturbines.com/) is developing new technology for exploiting tidal currents for large-scale power generation. 1MW SeaGen tidal device set to be installed in Northern Ireland’s Strangford Lough.
  • GCK Technology (http://www.gcktechnology.com/) - The Gorlov Helical Turbine (GHT) was specifically designed for hydroelectric applications in free flowing low head water courses. Demonstrates superior power efficiency in free currents compared to other known turbines. Rotates at twice the velocity of the water current flow. Inexhaustible energy from flowing water created by: Rivers, Tidal currents, Ocean currents.
  • BioPower Systems (http://www.biopowersystems.com/biostream.html) - The tidal energy conversion system, bioSTREAM™, is based on the highly efficient propulsion of Thunniform mode swimming species, such as shark, tuna, and mackerel. It mimics the shape and motion of these species but is a fixed device in a moving stream. The energy in the passing flow is used to drive the device motion against the resisting torque of the O-DRIVE™ electrical generator.
  • Vortex Oscillation Technology (http://www.vortexosc.com/modules.php?name=Content&pa=showpage&pid=87) - Generators with oscillating actuating bodies can give several times lower cost electric power. It is possible to produce generators from 0.1 Kw up to 100 Mw, from wind, rivers, tide and sea currents.
  • Lunar Energy (http://www.lunarenergy.co.uk/) - The duct captures a large area of the tidal stream and accelerates the flow through a narrowing channel into the turbine. The turbine is of a symmetrical design and capable of bi-directional operation obviating the need for a pitch or yaw control thus keeping the design simple and more cost effective.
  • The Engineering Business (http://www.engb.com/services_09a.php) - Stingray Tidal Stream Generator consists of a hydroplane which has its attack angle relative to the approaching water stream varied by a simple mechanism. This causes the supporting arm to oscillate which in turn forces hydraulic cylinders to extend and retract. This produces high pressure oil which is used to drive a generator.
  • Robert Gordon University (http://www.rgu.ac.uk/cree/general/page.cfm?pge=10769) - Sea Snail seabed mounted tidal current turbine is based on the familiar upturned aerofoil found on most racing cars. A number of hydrofoils are mounted on a frame in such a way as to induce a downforce from the stream flow.
  • ScotRenewables (http://www.scotrenewables.com/marine_tech.html) - Free-floating tidal current energy converter with dual counter-rotating horizontal-axis rotors driving generators within sub-surface nacelles, suspended from a surface buoyancy tube. It is anchored to the seabed via a yoke arrangement and compliant mooring system with a separate flexible power and control umbilical that connects to a subsea junction box.
  • Tidal Sails (http://www.tidalsails.com/) - Like a set of vertical blinds under water which are being pulled from start to end station by the tidal current. A magazine at the start station deploys sails at certain intervals; at the same time as the end station magazine is detaching and collecting arriving sails. Huge sails affixed to long cables under water are pulled by the tidal stream, feeding a generator, which in turn produces electricity.
  • Ponte di Archimede (http://www.pontediarchimede.it/language_us/progetti_det.mvd?RECID=2&CAT=002&SUBCAT=&MODULO=Progetti_ENG&returnpages=&page_pd=p) - The Kobold turbine is a rotor mounted on a vertical shaft which produces mechanical energy by exploiting marine tidal currents, rotates independently of the direction of the current, has high torque, is self starting, and has efficiency comparable to wind turbines.
  • China Endorses 300 MW Ocean Energy Project (http://www.renewableenergyaccess.com/rea/news/story;jsessionid=a8uHiP7nNc-5?id=17685) - ocean waters off the coast of China are on their way to gaining a large-scale tidal lagoon energy project. (RenewableEnergyAccess; Nov. 2, 2004)
  • World's Largest Tidal Power Plant in S. Korea (http://alt-e.blogspot.com/2004/10/alternative-energy-korea-worlds.html) - The plant, scheduled for construction in November, will produce enough electricity for the local population of 500,000. (Alt-Eng-News; Oct. 5, 2004)
  • Tidal flow to power New York City (http://www.nature.com/news/2004/040809//full/040809-17.html) - Verdant Power planning to install turbines in the East River. $4.5-million project to build farm of tide-powered turbines. Starting at 6 turbines generating a total of 200kw; they plan to implement 200 - 300 turbines. (Nature; Aug. 13, 2004) (Verdant)
  • Verdant Energy deploys Tidal Turbines (http://video.on.nytimes.com/ifr_main.jsp?nsid=a28ed9693:10fe628cd34:616c&st=1167800618115&mp=WMP&cpf=true&fvn=9&fr=010207_115224_28ed9693x10fe628cd34x33f1&rdm=390286.9430167594) (9 min) - Turbines look like typical horizontal axis wind turbine, except they harness the moving water from tides in Manhattan's rivers. After test phase, hundreds could be installed to power around 9,000 homes. (New York Times; Jan. 2, 2006)
  • Consortium Examines Tidal Power Generation for UK (http://www.renewableenergyaccess.com/rea/news/story?id=38117) - The first Tidal Delay pilot plant in the UK, to be constructed in 2007/2008, will initiate a series of plants that will contribute to the UK's commitment to renewable energy and further enhance the UK's strength in marine energy technology leadership. (Renewable Energy Access; Oct. 19)
  • Mersey River tidal power station proposed (http://www.physorg.com/news8392.html) - The Mersey River may soon become the first river in Britain to generate electricity by tidal activity. River hydro fence would taps 2 gigawatts of electricity. (PhysOrg; Nov. 2005)
  • Sea change for tidal power (http://www.nature.com/nsu/040322/040322-7.html) - The TidEl system uses floating turbines that are anchored to the seabed by chains. The underwater windmills drift back and forth with the tide, so they point in the best direction to get power from the spinning blades. (Nature; Mar. 24, 2004)
  • Tidal power could make island energy exporter (http://www.distributedpowersolutions.com/newsletter/newsletter.asp?t=108an7497&r=http://www.thisisguernsey.com/code/shownewsarticle.pl?ArticleID=011171) - Guernsey Electricity invests £250,000. "The potential tidal-flow power between here and Jersey is around 200MW." (Mar. 2004)

Tidal Lagoons

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Other Instances of Tidal Power

  • Devon England (http://news.bbc.co.uk/1/hi/england/devon/2992996.stm) (BBC)
  • Cornwall England (http://news.bbc.co.uk/1/hi/england/cornwall/3477639.stm) (BBC)
    • Energy from the Cornwall Tide is Just a Channel Away (http://www.renewableenergyaccess.com/rea/news/story?id=23303) - A group of researchers in England are contemplating an offshore Ocean Hydro Electricity Generator power plant. (Renewable Energy Access; March 3, 2005)
  • France (http://www.darvill.clara.net/altenerg/tidal.htm)
  • Nova Scotia Canada (http://www.nspower.ca/AboutUs/OurBusiness/PowerProduction/HowWeGeneratePower/TidalPower.html) (1984)
  • Barents Sea, Russia (http://66.102.7.104/search?q=cache:jwoTKjBGc5EJ:my.fit.edu/~fleslie/CourseRE/ClassPres/ClassPPT/RE150Ocean.ppt+tide+Kislaya+Guba++Russia&hl=en) (1968)
  • China (http://www.worldenergy.org/wec-geis/publications/reports/ser/tide/tide.asp) - (1958) - Article mentions all the above installations as well as those in Australia, Argentina, Mexico, India, Korea.
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In the News

  • N.S. Power to test new tidal power generator (http://www.cbc.ca/technology/story/2007/01/12/tidal-power.html) - Nova Scotia Power (http://www.nspower.ca/about_nspi/generation/tidal/index.shtml) is looking at in-stream tidal power as an alternative to its 20 MW tidal dam. An Irish partner, OpenHydro (http://www.openhydro.com/), will build a 1 MW test turbine in the Bay of Fundy, site of the world’s highest tides. The installation won't be operational before 2009, and it will require a turbine "farm" to produce significant amounts of power. (CBC News; January 12, 2007)
  • Video of Underwater Turbines Being Installed (http://www.treehugger.com/files/2007/01/great_video_of.php) - The New York Times (http://video.on.nytimes.com/ifr_main.jsp?nsid=a28ed9693:10fe42e59ac:-5b6a&st=1167764747218&mp=FLV&cpf=false&fvn=9&fr=010207_015540_28ed9693x10fe4036100x6d17&rdm=840902.9287323294) has a video of the installation of two turbines near Roosevelt Island in New York City- one is a test device to monitor fish and conditions, the other generating power. Tide-powered underwater turbines look like windmills, but use tidal currents to make electricity. (TreeHugger; January 2, 2007)
  • Turbines expected to make waves  (http://www.nydailynews.com/news/local/story/358424p-305453c.html) Verdant Power - After two years of waiting for all the required approvals, the project was green-lighted by the state's Department of Environmental Conservation around Labor Day. The final okay must be given by the Army Corps of Engineers, but that has yet to happen. (DAILY NEWS; Oct. 25, 2005)
  • Tidal flow to power New York City (http://www.nature.com/news/2004/040809//full/040809-17.html) - Verdant Power planning to install turbines in the East River. $4.5-million project may form the first farm of tide-powered turbines in the world. Starting at 6 turbines generating a total of 200kw; they plan to implement 200 - 300 turbines. (Nature; Aug. 13, 2004)
  • Sea change for tidal power (http://www.nature.com/nsu/040322/040322-7.html) - The TidEl system uses floating turbines that are anchored to the seabed by chains. The underwater windmills drift back and forth with the tide, so they point in the best direction to get power from the spinning blades. (Nature; Mar. 24, 2004)
  • Tidal power could make island energy exporter (http://www.distributedpowersolutions.com/newsletter/newsletter.asp?) - Guernsey Electricity invests £250,000. "The potential tidal-flow power between here and Jersey is around 200MW." (Distributed Power Solutions; Mar. 2004)
[edit]

Backing

  • Verdant Power (http://www.verdantpower.com/) - Company installing tidal power generators in the East River of New York City
  • New Business Cycle Expected for Ocean Energy (http://www.renewableenergyaccess.com/rea/news/story?id=35104) - After securing helpful policy items in the recently passed House-Senate energy bill, proponents of ocean energy are looking forward to an accelerated business cycle for the nascent renewable energy technology. (Renewable Energy Access; Aug. 5, 2005)
  • UK gets 50 Million boost to wave and tidal energy (http://www.gnn.gov.uk/environment/detail.asp?ReleaseID=125300&NewsAreaID=2&NavigatedFromDepartment=False) - biggest award ever to harness sea power for UK. (GNN.gov.uk; Aug. 2, 2004) (also (http://www.edie.net/gf.cfm?L=left_frame.html&R=http://www.edie.net/news/Archive/8693.cfm))
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Skeptics

  • Why Tidal Energy is Unfeasible (http://freeenergynews.com/Directory/Tidal/untamable_tide.htm) - William A. Rhodes explains the dynamics of such a system that must both handle infrequent fluctuations as well as hurricanes.
  • Warning over tidal energy impact (http://news.bbc.co.uk/1/hi/scotland/3580484.stm) - Wave energy projects could adversely affect marine life and tidal environments. (BBC; Aug. 20, 2004)
  • Indian Tidal Power Plant to Threaten Tigers (http://www.planetark.com/dailynewsstory.cfm/newsid/37074/story.htm) - Tigers in the world's largest reserve for the big cats are threatened by Indian plans for a tidal power project that will only provide electricity for a few thousand families. (Reuters; July 3, 2006)
  • Tidal Power Delayed for Whale (http://www.solaraccess.com/news/story?storyid=7428&siteid=1674) - Annapolis Tidal Generating Station temporarily shuts down as young humpback whale explores the River off of the Bay of Fundy in Nova Scotia. (Solar Access; Aug. 26, 2004)
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Directories

  • Google > Tidal Energy (http://www.google.com/search?sourceid=navclient&q=tidal+energy)
  • Google Directory > Renewable Energy > Tides (http://directory.google.com/Top/Science/Technology/Energy/Renewable/Ocean_Sources/Tides/?tc=1)
  • Google News > Tidal Energy (http://news.google.com/news?sourceid=navclient&q=tidal+energy&btnG=Search+News)
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See also

- Other Directory listings • Latest • A-I • J-R • S-Z • Tree • News
- PESWiki home page

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