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					                      DRAFT FOR DISCUSSION
Alaska Presentation
January 2007




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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

 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


                                                Lunar Energy Copyright
The Rotech Tidal Turbine – Design Development
Atkins (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)




                                                Lunar Energy Copyright
The Rotech Tidal Turbine – Design Development
Atkins/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




                                                Lunar Energy Copyright
The Rotech Tidal Turbine – Design Development
Sir 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




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The Rotech Tidal Turbine – 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




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Hydraulic Circuit Assembly September - December 2006




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EMEC   TIDAL TEST SITE


                  Lunar Energy Test
                        Berth
                 Depth: 45 m (150 feet)
                  Flow Peak 7.2 knots
                       (3.7 m/s)




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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.




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RTT and ALASKA

Current RTT design is ideally suited for
the Alaskan operating environment




                                           “Lunar Energy RTT - Only
                                           currently viable deepwater
                                           technology design”




                                                           Lunar Energy Copyright
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

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                       DRAFT FOR DISCUSSION

www.lunarenergy.co.u
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