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Tidal current energy

Tidal current energy. From water currents to electric energy. Johan Forslund johan.forslund@angstrom.uu.se. Chapter 1: Renewable energies - Marine Current Power Chapter 2: Marine Current Power at Uppsala University. The road of electricity production and consumption:.

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Tidal current energy

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  1. Tidal current energy • From water currents to electric energy Johan Forslund johan.forslund@angstrom.uu.se

  2. Chapter 1: Renewable energies - Marine Current Power Chapter 2: Marine Current Power at Uppsala University

  3. The road of electricity production and consumption: Transform and consume Transform and transmit Convert to electricity Power absorption Resource

  4. Chapter 1: Renewable energies

  5. Intermittency in renewable Energy Intermittency is the time scale of natural variation for different renewable energy sources that we can not regulate. • Solar radiation – may vary within seconds as well as during day and night, summer and winter • Wind – may vary within minutes, seasonal changes • Wave – May vary within hours, seasonal changes • Tidal – tidal cycle of twice a day • Hydro - stock pile energy, seasonal changes

  6. Technology for tidal current energy conversion – turbine concepts Verticalaxis Horizontalaxis Oscillatinghydrofoils Horizontalaxis Kobold turbine (Italy) Operating since 2001 Power= 25 kW Hammerfest Ström (Norway) Operating since 2003 Power = 300 kW The Stingray (UK), briefly operated during 2003, 150 kW Open Hydro (Scotland) Deployed 2009 1 MW

  7. The tidal barrage La Rance Photo: Wikipedia 21st July 2017: Low tide at 00.09: 2.90 m High tide at 05.48: 10.7 m Low tide at 12.40: 2.6 m High tide at 18.17: 11.20

  8. The tidal barrage La Rance Photos: Johan Forslund

  9. The tidal barrage La Rance Kaplan- turbine Photos: Johan Forslund

  10. The tidal barrage La Rance Photo: Johan Forslund

  11. Tidal resource – Sites for tidal barrages Compare with one nuclear power plant (One Ringhals ~6.5 TWh/year) and Number of homes it supplies

  12. Chapter 2: Marine Current Power - Uppsala University

  13. The Söderfors Site -Marine Current Power (MCP) at UU The concept is focused around a vertical axis turbine and a direct drive PM generator - a simple and robust system with few moving parts Vertical axis turbine Generator

  14. The experimental site in Söderfors

  15. The MCP generator

  16. The MCP turbine

  17. Thank you for your attention Pictures and information about the companies and their prototypes can be found at the following websites Marine current turbines - http://www.marineturbines.com Open Hydro - http://www.openhydro.com Atlantis - http://www.atlantisresourcescorporation.com Kobold Turbine - http://www.pontediarchimede.com Lunar Energy - http://www.lunarenergy.co.uk Hammerfest Ström - http://www.hammerfeststrom.com Clean Current - http://www.cleancurrent.com Race Rocks - http://www.racerocks.com Swan Turbines - http://www.swanturbines.co.uk Verdant Power - http://verdantpower.com … and there are several more prototypes around!

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