Puget Sound Pilot Tidal Energy Project (TRL 7/8)

Puget Sound Pilot Tidal Energy Project (TRL 7/8)

Water Power Peer Review Puget Sound Pilot Tidal Energy Project (TRL 7/8) 1 | Program Name or Ancillary Text Dr. Brian Polagye (for Craig Collar) University of Washington [email protected] November 1, 2011 (Snohomish PUD) eere.energy.gov Purpose & Objectives Snohomish County Public Utility District and its partners propose to deploy two tidal energy turbines in Admiralty Inlet, Puget Sound, WA. Site identified as one of the largest tidal hydrokinetic resources in the United States.

Requires deep water technology (depth > 50 m) Sensitive environment within the range of several endangered species and under existing anthropogenic stress. 2 | Wind and Water Power Program eere.energy.gov Purpose & Objectives Project Statement: Deploy, operate, and evaluate two OpenCentre Turbines developed and manufactured by OpenHydro Group Ltd. 6 m rotor diameter ~250 kW peak generation Grid connected (separate cables)

3-5 year deployment 6th Generation Open-Centre Turbine Project Purpose: Gather data to advance the technical, economic, social, and environmental viability of commercial-scale tidal energy. These data are critical to the responsible advancement of commercial scale tidal energy in the United States. 3 | Wind and Water Power Program eere.energy.gov Integration Resource characteristics informing device design Acoustic characterization of tidal energy devices Risk assessment case study Passive acoustic system for localizing marine mammals Interest in instrumentation package testing 4 | Wind and Water Power Program eere.energy.gov

Technical Approach Deployment Installed directly on the seabed (no surface visibility) Steel tubular frame filled with concrete and stone ballast No pinning, piling, or drilling to secure the turbine foundation to the seabed 5 | Wind and Water Power Program eere.energy.gov Technical Approach Monitoring Challenges Adequately monitored pilot projects are the only viable way to reduce technical, economic, social, and environmental uncertainties Challenging for any tidal energy development , but more so for deployment in Admiralty Inlet Largely beyond the reach of human divers

Beneath the photic zone Conditions are the rule not the exception for most utility-scale tidal energy resources Maintaining and upgrading monitoring Requires recovery, redeployment, and reconnection to turbine power and communications Need to minimize biofouling over periods of several months 6 | Wind and Water Power Program eere.energy.gov Technical Approach Monitoring Implementation Stereo Imaging Marine life Device condition CTDO Water

quality Junction Bottle Wet-mate power and fiber Doppler profilers Wake Inflow conditions Export Cable Generated power Power for monitoring > 4 fiber optic channels 7 | Wind and Water Power Program ? Power and Communications Distribution

Hydrophone Array Marine mammals Device noise ? Turbine SCADA Rotation rate Stress/strain Vibration Temperature eere.energy.gov Technical Approach Performance Evaluation Turbine SCADA Rotational rate Structural strain Vibration Generator temperature

Shore Station kWh produced Capacity factor Power quality Availability System Efficiency Operations Reliability Maintainability O&M costs by process 8 | Wind and Water Power Program Project Layout: Turbines and Export Cables eere.energy.gov Technical Approach Static Effects Concerns Addressed Colonization of support structures (artificial reef effects) Modification to benthic habitat around turbine base

Modification of benthic habitat by turbine wake Approach ROV surveys during diurnal inequality Benthic habitat monitored at several monuments Quarterly during first year Six months thereafter Benthic habitat survey Deep Ocean Phantom 2+2 ROV 9 | Wind and Water Power Program eere.energy.gov Technical Approach Acoustics Concerns Addressed Received levels of noise in vicinity of project Variations in received levels

with power output Variations in received levels over time Approach Intensive post-installation characterization (drift measurements) Low duty-cycle, long-term monitoring (on turbine) 10 | Wind and Water Power Program Heave isolation DAQ Computer Anti-strum faring Hydrophone Flow Shield Pressure Logger

NNMREC drifting survey instrumentation eere.energy.gov Technical Approach Marine Mammals Concerns Addressed Behavioral changes associated with project operation Approach Shoreline observers Click detection Vocalization detection (and localization) Key Challenges Signal to noise 11 | Wind and Water Power Program eere.energy.gov Technical Approach Dynamic

Effects Concerns Addressed Interaction of marine animals with turbine rotor Species interacting with turbine Approach Stereo imaging with artificial illumination Duty cycle, transitioning to triggered or event-based illumination 12 | Wind and Water Power Program eere.energy.gov Plan, Schedule, & Budget Schedule (Calendar Year Under Development)

4Q11: Complete contract negotiations with DOE. 1Q12: Submit Final Pilot Plant License Application to FERC. 2-3Q12: Final Project design. 3-4Q12: Complete all permitting processes and project budget. 4Q12: Go/No-go decision to move forward with turbine order. 2013: Turbine and foundation fabrication, shipping, staging. 2014: Project installation and commissioning 2014-18: Project operations and testing. Budget Proposed Project Budget: $20,300,000 Proposed Recipient Cost Share: $10,300,000 13 | Wind and Water Power Program eere.energy.gov

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