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tidal presentation

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tidal presentation

  1. 1. Tidal Fence Turbines BY: FREDRICO WATSON
  2. 2. Table of Content  Introduction  What is a Tidal Fence Turbine?  How does it work?  Where are they placed?  United Kingdom  Scotland  Canada  South Korea  France  Advantages  Disadvantages  Conclusion
  3. 3. Introduction  Tidal energy has been around since 900 A.D. and has advance greatly over the years. The tidal fence turbine is a combination of a tidal barrage and tidal stream turbine. The tidal fence takes advantage of the fast flowing underwater currents and converts the kinetic energy into electricity.
  4. 4. What is a Tidal Fence Turbine?  It is an man-made device used to harvest kinetic energy from the sea  They are entwined together like a fence  They are submerged in the sea
  5. 5. How does it work?  Tidal fence is a series mounted in a row across a estuary  Each turbine has a vertical shaft attached  The shaft is mounted in the fence  The tidal currents spin the turbines  When the turbine is turned the attached generator shaft turns and produce electricity  The turbine and shaft are the only elements submerged  The generator and transformers are above water
  6. 6. Where are they placed?  They are placed usually in enhanced tidal areas  By the entrance of estuaries or narrow channels  They are located in area such as The United Kingdom, Scotland, Canada, South Korea & France Water flow
  7. 7. United Kingdom  Estimated that the UK can generate 50.2 TW h/yr with tidal  Western Europe as a whole is estimated to generate up to 105TWh/yr  Tidal fences wouldn’t not affect the currents
  8. 8. Scotland  The MeyGen tidal project is the largest tidal turbine project in Caithness, Scotland  The capacity proposed was 86MW  They increased the capacity to 298MW  The project was a collaboration of Atlantis Resources & Morgan Stanley  Atlantis Resources got full responsibility of the project
  9. 9. Canada  Installed a 20MW in Annapolis Basin  The world third biggest operating tidal power plant  Generates 50GWh annually  Powers over 4000homes  The plant is operated by Nova Scotia Power  Uses a path built in the 1960’s  Path meant to be a transportation link  The plant has four single blade turbine  The gates are closed when tides create head ponds  Turbine generate power when the head pond is 1.6m or more
  10. 10. South Korea  The Sihwa Lake tidal power station has a capacity of 254MW  It is said to be world’s biggest tidal power plant  The plant uses 12.5km long seawall  Has 10 submerged 25MW bulb turbines  Project took 7years to be initiated & operational  Daewoo Engineering & Construction was used for construction of the project  The annual generation capacity of the plant is 552.7GWh
  11. 11. France  The La Rance tidal power plant has been used since 1966  Was constructed in 1961  It is the world oldest power station  The second biggest tidal power station  The dam of the tidal plant is 145.1m long with sixed wheel gates  163.6m long drain  Power is produced using 24 reversible 10MW rated bulb turbines  The power is sent to a 225kV national transmission network  The network powers approximately 130,000 household annually
  12. 12. Advantage  Energy can be produce all year round  Can be calculated or predictable  Clean energy  Cheap energy after initial investment is paid off  Can get more energy from waves compared to other renewables such as wind
  13. 13. Disadvantages  Initial Cost  Maintenance  Can alter the flow of salt water in and out of bays  Too many placed in an area can block the flow  Kills marine life  Limited locations to put them
  14. 14. Conclusion  Tidal energy is a very clean. It is a renewable and inexhaustible power source meaning that it can produce energy all year. It has the potential to replace coal. The only problem is that they cant be placed in any locations based on sea level restrictions. The high initial cost is also a set back to tidal plants. The tidal fence will be a great resource once problems such as the killing of marine life or altering currents are resolved.
  15. 15. References  Bagher, A. M., Vahid, M. M., Reza, B. M., Mohsen, M., & Mahshid, G. (2015). Tidal Energy: Advantage and disadvantage. Bulletin of Advance Science Research.  Benelghali, S., Benbouzid, M., & Charpentier, J. F. (2007, May 7). Marine Tidal Current Electric Power Generation Technology: State of the Art and Current Status. Antalya: HAL archives-ouvertes.  Draper, S., Borthwick, A. G., & Houlsby, G. T. (2013, January 14). Energy Potential of a tidal fence deployed near a coastal headland. Retrieved from Philosophical Transactions of the Royal Society of London:  Garrett, C., & Cummins, P. (2005, August 8). The power potential of tidal currents in channels. Royal Society. Victoria, British Columbia, Canada: The Royal Society.  Garrett, C., & Cummins, P. (2007). The efficiency of a turbine in a tidal channel. Journal of fluid mechanics. Victoria, British Columbia, Canada: Institute of Ocean Sciences.  Giles, J., Godfrey, I., Bryden, I., Myers, L., O'Nians, J., Bahaj, A., & Griffiths, J. (2010). An innovative tidal fence development for the Severn Estuary,. Southampton: School of Civil Engineering.  Nanayakkara, L., & Nanayakkara, P. (2015). United States of America Patent No. US8987932 B2.  Pelc, R., & Fujita, R. M. (2002). Renewable energy from the ocean. Marine Policy, 26, 471-479.  Zwiernik, A. (2010). Bahamas Minizing and Living with Climate Volatity. Michigan: Laingsburg High School.