ORPC AlaskaThe Future of Tidal Energy on the Railbeltgy

Alaska Rural Energy ConferenceApril 28, 2010

Monty Worthington, Director of Project Development, Alaska

Ocean Renewable Power Company OverviewOverview

• Developer of technology and projects that convert i tid l d

• Founded in 2004 with executive offices in Portland,

river, tidal, and ocean currents into emission free electricity

Maine and project offices in• Anchorage, AK (ORPC Alaska,

LLC)• Eastport Maine (ORPC • Eastport, Maine (ORPC

Maine, LLC)

• Proprietary technology including OCGen™, TidGen™, g , ,and RivGen™ power systems

• Project sites in Cook Inlet and Nenana, AK, and Eastport, ME, , p ,

• Beta Turbine Generator Unit (TGU) deployed in March 2010

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Tidal Energy potential on the Railbelt –Cook InletCook Inlet

Cook Inlet has the 2nd Highest Tidal Range in North America Tidal Range in North America peaking at 40 feet.Prime Tidal Current sites In Cook Inlet are Near to electrical Infrastructure including:Infrastructure including:

Northern Cook Inlet sites, Knik Arm, Turnagin Arm, Fire Island, Anchorage waterfrontMiddle inlet sites at the Middle inlet sites at the Forelands near to Natural Gas Infrastructure and KenaiLower inlet sites including Kachemak Bay near Homer Kachemak Bay near Homer Seldovia, Port Graham and Nanwalek

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Upper Cook Inlet tidal surface currents

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Cook Inlet Tidal Height Stationsg

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Cook Inlet Tidal Current Stations

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Continuous power availability with multiple sitesContinuous power availability with multiple sites

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FERC preliminary permits in Cook Inlet• ORPC’s Cook Inlet Tidal Energy Project •Little Susitna Construction Company’s • ORPC s Cook Inlet Tidal Energy Project 2nd Preliminary Permit applied for 3/31/10

Little Susitna Construction Company s Turnagain Arm Tidal Electric Generation Project

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Tid l t h l iTidal technologies

• 5 years ago 5 years ago …

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Tid l t h l iTidal technologies

• Today!Today!

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Two Basic Turbine Variations – Axial Flow and Cross Flow Axial FlowAxial Flow

Cross Flow

Marine Current Turbines 1.2 MW Sea Gen

New Energy’s 5kW Encurrent Turbine

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ORPC Technology Evolution

TidGen™ Power SystemBeta TGU

Proprietary TGU is the core of three hydrokinetic power systems

TidGen™ Power SystemBottom mounted TGU forshallow tidal applications

OCGen™ Power SystemFloating OCGen™ Modules (stackedTGUs) for deep tidal and offshoreocean current applications

RivGen™ Power SystemBottom mounted TGU forremote river applicationsremote river applications

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ORPC’s Beta Turbine Generator Unit (TGU)

Weight: 13 tons

Design capacity:

14 feet

Design capacity:60 kilowatts

Steel and composite TGU support frame

14 feet tall

Underwater PermanentMagnet Generator

ADCF Turbine

Visual Comparison – TGU & 6’ Tall Human

The Energy Tide 2 Barge Facts: Barge Facts:

60’ long x 24’ wide with 6’ hull side Displacement capacity of 75 tons

Beta TGU deployed 21’ below water (TGU center) Variable voltage variable frequency electrical Variable voltage, variable frequency electrical output converted into grid-compatible power Includes state-of-the-art environmental monitoring equipment (Didson, Simrad, etc.) System operations monitored using 4 underwater System operations monitored using 4 underwatercameras (2 color, 2 black & white) Operational parameters monitored & data recorded Anchored in Cobscook Bay, ME using a 4-legged single point mooring systemsingle point mooring system

Flow

ORPC’s Beta TGU and ET2

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Energy Tide 2 at mooring

Beta TGU turbine first rotations

TidGen™ Device - a closer look•Tidgen™ TGU will be rated at 150-200kW in a 6 knot current•TidGen™ TGU Will utilize (4) Beta sized turbines – 8.5 ft dia. X 18 ft long each18 ft long each•TidGen™ TGU will be 90’ x 14’ and 30’ above the seafloorTidGen™ Devices and •TidGen™ Devices and

Bottom frame will weighapproximately 60 tons and will be separately installedinstalled•TidGen™ Device footprint will consist of (4) 6’ diameter feet.

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OCGen™ Module - a closer look

•OCGenTM Modules will be attached to the seafloor via a compliant mooring system with screw type, gravity based, or driven anchors.•OCGenTM Modules will be comprised of 1 to 4 TidGenTM

Type TGU’s each 90’x 14’. •OCGenTM Modules will utilize 1/10th the weight and amount 1/10 the weight and amount of materials for bottom attachment decreasing cost of the attachment system.•OCGenTM Modules will minimize •OCGenTM Modules will minimize benthic disturbance with as little as (4) 2’ diameter footprints per module

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ORPC’s Cook Inlet Tidal Energy Project

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Resource at Fire Island Site

Summary StatisticsReported at middle of water column

Site ADM‐1 ADM‐2 ADM‐3 Cook

Velocity NaN NaN NaN NaNMean speed (m/s) 1 05 1 08 1 12 1 28Mean speed (m/s) 1.05 1.08 1.12 1.28Max sustained speed (m/s) 2.73 2.93 2.91 2.78Ebb/flood asymmetry 0.97 0.95 0.96 0.85Vertical shear (m/s per m) 0.0108 0.0236 0.0178 0.028

Power NaN NaN NaN NaNMean power density (kW/m2) 1.28 1.51 1.34 1.71Ebb/flood asymmetry 0.91 0.91 0.88 0.55

Direction NaN NaN NaN NaNPrinciple axis (deg) 139 132 137 66Standard deviation (deg) 11 6 12 4Ebb/flood asymmetry (deg) 15.1 4.1 26.3 6.2

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What is the long term potential of Tidal h lb lEnergy on The Railbelt?

• Overall resource is little understood - Cairn Point area Alone has at least 117MW of average powerAlone has at least 117MW of average power

• Estimate that 100+ MW of power could be extracted from the Forelands Area, with potential to repurpose existing energy infrastructureN th I l t d K h k B ld lik l • Northern Inlet and Kachemak Bay would likely contribute up to 100 MW

• Staggered phases of inlet tides will allow for predictable energy delivery and provide capacity for b l dbaseload power

• In combination with the development of other Cook Inlet Region renewable resources such as Fire Island Wind and other wind projects, Mt. Spurr Geothermal,

d di i l h d j Tid l E ld b and traditional hydro projects, Tidal Energy could be a significant part of a diversified and robust renewable energy portfolio to extend natural gas viability and supply the majority of Railbelt energy needs

Thank youQuestions?

www.oceanrenewablepower.com23

Turbine spinning