Lunar Energy Copyright DRAFT FOR DISCUSSION Alaska Presentation January 2007

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

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

Lunar Energy Copyright Sir Robert McAlpine commissioned to develop commercial ideas and processes from first principles Design remarkably similar to Atkins prototype design concept The Rotech Tidal Turbine – Design Development Sir Robert McAlpine Commercial (All Concrete) Design

Lunar Energy Copyright 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

Lunar Energy Copyright Hydraulic Circuit Assembly September - December 2006

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

Lunar Energy Copyright 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.

Lunar Energy Copyright 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). 2007Negotiations ongoing for initial demonstration projects in Canada and in the US 2009Installation and commissioning of projects in Canada; US; and New Zealand 2010/11First developments of commercial fields outside UK

Lunar Energy Copyright DRAFT FOR DISCUSSION