nw national marine renewable energy center
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NW National Marine Renewable Energy Center depts.washington.edu/nnmrec Site Characterization of Admiralty Inlet August 26, 2009 Brian Polagye University of Washington, Mechanical Engineering. Partnership between Oregon State University (Wave Energy) and University of Washington (Tidal Energy) - PowerPoint PPT PresentationTRANSCRIPT
Northwest National Marine Renewable Energy Center
NW National Marine Renewable Energy Centerdepts.washington.edu/nnmrec
Site Characterization of Admiralty InletAugust 26, 2009
Brian PolagyeUniversity of Washington, Mechanical Engineering
Northwest National Marine Renewable Energy Center
• Partnership between Oregon State University (Wave Energy) and University of Washington (Tidal Energy)
• Funded by US Department of Energy, Oregon, Washington, and industry partners
• Tidal energy research focused on four areas:– Site and device characterization– Device and array optimization– Environmental effects– Materials to improve survivability and reliability
NNMREC Overview
Northwest National Marine Renewable Energy Center
NNMREC Mission
“Facilitate responsible device commercialization, inform regulatory and policy decisions, and close key gaps in
understanding.”
•Developing generally applicable tools and methodologies
•For site and device characterization, using Snohomish PUD project as a test case for these tools and methodologies
Northwest National Marine Renewable Energy Center010,04-23-09,TID
Site and Device Characterization
Field measurements (surveys + stationary) to inform:• Site developers: resource and site characteristics
• Device developers: device performance
• Regulators: near-field effects
R/V Jack Robertson
J. Thomson (UW-APL) & B. Polagye (UW-ME)
Northwest National Marine Renewable Energy Center
ADCP (Acoustic Doppler current profiler)
Lead Weight(600 lbs)
CTDO (conductivity, temperature, depth, dissolved oxygen –
partnership with WA Dept of Ecology)
Hydrophone (background noise)
T-POD recorder
(porpoise clicks)
Acoustic release (redundant recovery)
Programmed for 3 month deployments
VEMCO recorder(tagged fish species –
partnership with NMFS)
Stationary Measurements via “Sea Spider”
Northwest National Marine Renewable Energy Center012,04-23-09,TID
Stationary Measurement of Tidal Currents
Power generation generally requires > 1 m/s
Northwest National Marine Renewable Energy Center003,04-22-09,TID
Shipboard Survey of Tidal Currents
Northwest National Marine Renewable Energy Center
-70
-60
-50
-40
-30
-20
-10
0
0.00 0.20 0.40 0.60 0.80 1.00
Turbidity (NTU)
Dep
th (
m) Cast 1
Cast 2
Cast 3
Cast 4
Cast 5
003,04-22-09,TID
Shipboard Survey of Water Quality
In-situ measurements show slight halocline and thermocline (for this cast)
Lab results indicate low turbidity (for this season)
(WHO drinking water guidelines: < 1 NTU)
Northwest National Marine Renewable Energy Center006,04-22-09,TID
Shipboard Survey of Fish Abundance
Seabed return
Large Cobbles
Fish School?
• BioSonics echosounder (Center partner)
• Significant cross-talk between echosounder, ADCP, and depth finder
Northwest National Marine Renewable Energy Center004,04-22-09,TID
Shipboard Survey of Underwater Noise
Northwest National Marine Renewable Energy Center005,04-22-09,TID
ROV Survey (video) of Seabed
• Scoured seabed• Relatively flat• Cobbles and gravel• Sponges• Barnacles
• Consistent with high currents and grab samples