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Exploring Tidal Energy: NW Marine Renewable Center

Discover the potential of tidal energy with the National Marine Renewable Energy Center at University of Washington. Learn about tidal energy projects, considerations, and the pioneering work in this field.

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Exploring Tidal Energy: NW Marine Renewable Center

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  1. In-stream Tidal Energy: NW National Marine Renewable Energy CenterUniversity of Washingtonhttp://depts.washington.edu/nnmrec Jim Thomson Applied Physics Lab and Civil & Environmental Eng. CEE500 - October 22, 2009

  2. Approaches to Tidal Energy Barrage Hydrokinetic • Comparable to hydroelectric • Very high cost and environmental footprint • Comparable to wind • Potentially lower cost and environmental footprint 001,04-23-09,TID

  3. Hydrokinetic Devices • No dominant design • Hundreds of concepts • Dozens of lab tests • Several field tests • No commercial projects Verdant Power New York, East River 5 m, 33 kW Clean Current Race Rocks, BC 3.5 m, ~65 kW Open Hydro EMEC, UK 6 m, ~150 kW MCT Strangford, UK 14x2 m, 1200 kW 002,04-23-09,TID

  4. Tidal Energy Projects in Puget Sound ~100-200 avg. MW practically recoverable Race Rocks Demonstration turbine Admiralty Inlet Proposed pilot project 10m diamter,~500 kW rated Marrowstone Island Proposed demonstration array 004,04-23-09,TID

  5. Motivation • I-937 obligations • Limited transmission capacity for new wind • Tidal energy advantages • Predictable resource • No CO2 emissions • No visual impact • Close to load centers Sun 005,04-23-09,TID

  6. Considerations • Existing use (fishing, shipping) • Potential environmental effects (noise production) • Cost (difficult environment) Power Cost 005,04-23-09,TID

  7. Northwest National Marine Energy Center • Oregon State University • Headquarters and Director (Bob Paasch) • Focus on Wave Energy • College of Engineering, Oceanography, Hatfield Marine Sciences Center • University of Washington • Co-Director (Phil Malte) • Focus on Tidal Energy • Mechanical Engineering, Oceanography, Applied Physics Lab • Partners • NREL, Snohomish PUD, BioSonics, Sound & Sea Technology, EPRI, Verdant Power, PNWER 007,04-23-09,TID

  8. Northwest National Marine Energy Center UW Focus areas (tidal): Environmental Effects Site Characterization and Instrumentation Array Optimization Materials (Survivability and Reliability) Faculty: Thomson (APL/CEE) & Polagye (ME) MS students: Chris Bassett, Jeff Epler, Sam Gooch APL staff: Joe Talbert, Alex deKlerk 007,04-23-09,TID

  9. Velocity Time Series Admiralty Inlet, April 2009 Power density is cube of velocity, P=½ρv3

  10. Turbulence Gooch et al, 2009

  11. Directionality Gooch et al, 2009

  12. Boundary Layer Effects Single profile Gooch et al, 2009

  13. Velocity Surveys Polagye, in progress 003,04-22-09,TID

  14. Underwater Noise: spectra Bassett, in progress

  15. Underwater Noise: sources Other ship traffic Other ship traffic Ferry crossings June 15th, 2009 Spectrogram Bassett, in progress

  16. Underwater Noise: sources Other ship traffic Ferry crossings June 15th, 2009 Spectrogram Bassett, in progress

  17. Underwater noise – cummulative Bassett, in progress

  18. Underwater pseudo-noise: pressure fluctuations at hydrophone Bassett, in progress

  19. Water quality: salinity, temperature, turbidity, oxygen, fluorescence, pH 003,04-22-09,TID

  20. Bottom characterization • Scoured seabed • Relatively flat • Cobbles and gravel • Sponges • Barnacles • Consistent with high currents and grab samples 005,04-22-09,TID

  21. Area 1: Environmental Effects – tidal range M. Kawase (UW-SO), B. Polagye (UW-ME), K. Thyng (UW-ME) Tidal range impact of 145 MW plant M2 amplitude change (mm) 1D Channel Model 009,04-23-09,TID

  22. Area 3: Array Optimization Profs. Aliseda (ME) & Riley (ME), MS student Teymour Javaherchi Single reference frame (SRF) simulations R/V Jack Robertson 013,04-23-09,TID

  23. Area 4: Survivability and Reliability M. Tuttle (ME), B. Polagye (ME) Before After Clean Current turbine: 6 months deployment 015,04-23-09,TID

  24. Area 4: Preliminary Materials Testing Carbon fiber in epoxy (uncoated) Glass fiber in epoxy (uncoated) High-copper coating (glass fiber in epoxy) Low-copper coating (glass fiber in epoxy) Inert coating (rubber) Aluminum (uncoated) Stainless steel (uncoated) 016,04-23-09,TID

  25. Questions? Northwest National Marine Renewable Energy Centernnmrec.oregonstate.edu (OSU - Wave) depts.washington.edu/nnmrec (UW - Tidal) 017,04-23-09,TID

  26. Area 2 Detail: Stationary Surveys Acoustic release (redundant recovery) Mini-CTD (salinity and temperature) 300 kHz ADCP (velocity) Sea Spider (heavy duty fiberglass frame) Hydrophone (background noise) Lead Weight (600 lbs) Programmed for 4 month deployment 012,04-23-09,TID

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