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Alaska Presentation January 2007

Alaska Presentation January 2007. The Rotech Tidal Turbine – Design Development Initial Concept. Designed with O&M foremost in mind Removal of complex components and design No mechanical Gearboxes, yawing or variable pitch mechanisms

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Alaska Presentation January 2007

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  1. Alaska Presentation • January 2007

  2. The Rotech TidalTurbine – Design DevelopmentInitial Concept • Designed with O&M foremost in mind • Removal of complex components and design • No mechanical Gearboxes, yawing or variable pitch mechanisms • System bi-directional and duct straightens flow allowing for off-turbine axis flows • Gravity Base allows quick installation and little if any seabed preparation • No gearbox allows generation compartment to be hermetically sealed removing risk of leaks • Modular section (cassette) containing all working parts is easily removable and taken to shore for service

  3. The Rotech TidalTurbine – Design DevelopmentAtkins (Mk I design) • Atkins developed initial concept using Oil & Gas Design codes • Full stress and fatigue analysis • Base development including 3-point to contact to remove torsion. • Cheap Ballast (pre-installed) used to make up on-bottom weight needed to prevent sliding • Note the position of the modular ‘cassette’ (the magenta coloured centre unit)

  4. The Rotech TidalTurbine – Design DevelopmentAtkins/Rotech MkII Design • Further development to make duct load bearing to remove tubular support frame • Over 20% costs reduction over initial design - steel requirement reduced and fabrication significantly cheaper • Base still gravity concept (not 3 mono-piles!) • Eloquent design allowing for significant local fabrication and handling

  5. The Rotech TidalTurbine – Design DevelopmentSir Robert McAlpine Commercial (All Concrete) Design • Sir Robert McAlpine commissioned to develop commercial ideas and processes from first principles • Design remarkably similar to Atkins prototype design concept

  6. The Rotech TidalTurbine – Modular Cassette and Generating Pod • Modular unit (cassette) containing turbines, all hydraulics and generating equipment • removed quickly and taken to shore for service • replaced by another unit to minimise down time • Pod seals to prevent leaks and held at atmospheric pressure and temperature to enable components to operate in ‘design’ conditions

  7. Hydraulic Circuit Assembly September - December 2006

  8. TIDAL TEST SITE EMEC Lunar Energy Test Berth Depth: 45 m (150 feet) Flow Peak 7.2 knots (3.7 m/s)

  9. Benefits of using the RTT • Technology Environmentally sensitive • Invisible from above the surface • No impediment to shipping or other social activity • No shoreline equipment required (except connection point) • Environmental credentials proven at EMEC 07/08 • EMEC has significant environmental considerations: Seal sanctuary and whale migration route • RTT has unique opportunity to mitigate issues through screening intake if necessary • RTT is below level of any surface ice and given the minimum 4 year cycle for maintenance, no service required during winter.

  10. RTT and ALASKA • Current RTT design is ideally suited for the Alaskan operating environment “Lunar Energy RTT - Only currently viable deepwater technology design”

  11. Commercial Development • United Kingdom • 2007 Sea trials of the EMEC 1MW unit • 2008/9 Commissioning and fabrication of the first Commercial Units • 2009/10 First demonstration field • 2011/12 First development of first commercial field • International • 2006 June 2006, Developer in New Zealand submitted resource consents application nominating the Lunar Energy RTT device for first commercial tidal stream project (200+MW). • 2007 Negotiations ongoing for initial demonstration projects in Canada and in the US • 2009 Installation and commissioning of projects in Canada; US; and New Zealand • 2010/11 First developments of commercial fields outside UK

  12. www.lunarenergy.co.uk

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