in-stream tidal energy
Post on 08-Jan-2022
3 Views
Preview:
TRANSCRIPT
Northwest National Marine Renewable Energy Center
In-stream Tidal Energy:NW National Marine Renewable Energy Center
University of Washingtondepts.washington.edu/nnmrec
AMTAS Spring 2009 MeetingApril 23, 2009
Northwest National Marine Renewable Energy Center
• In-stream Tidal Energy Overview
• NNMREC Structure and Activities
• Integration of Composite Materials
agenda,04-22-09,TID
Northwest National Marine Renewable Energy Center001,04-23-09,TID
Approaches to Tidal EnergyBarrage Hydrokinetic
Comparable to hydroelectricVery high cost and environmental footprint
Comparable to windPotentially lower cost and environmental footprint
Northwest National Marine Renewable Energy Center002,04-23-09,TID
Hydrokinetic DevicesNo dominant design
― Hundreds of concepts― Dozens of lab tests― Several field tests
No commercial projectsVerdant Power
New York, East River5 m, 33 kW
Clean CurrentRace Rocks, BC3.5 m, ~65 kW
Open HydroEMEC, UK
6 m, ~150 kW
MCTStrangford, UK
14x2 m, 1200 kW
Northwest National Marine Renewable Energy Center003,04-23-09,TID
Pile Chain Anchor
Tension Leg
Gravity Base
Gearbox-Generator
Direct Drive Generator
Foundation
Drive Train
Device Parameters
Rotor5-20 m10-20 rpm
20-80 m
2-3 m/s
Northwest National Marine Renewable Energy Center004,04-23-09,TID
Tidal Energy Projects in Puget Sound
Race RocksDemonstration turbine
Marrowstone IslandDemonstration array
Admiralty InletPilot project
~100-200 avg. MW practically recoverable
Northwest National Marine Renewable Energy Center005,04-23-09,TID
Local Drivers
■ I-937 obligations
■ Limited transmission capacity for new wind
■ Tidal energy advantages— Predictable resource— No CO2 emissions— No visual impact— Close to load centers
Northwest National Marine Renewable Energy Center006,04-23-09,TID
Tidal Energy Challenges
■ Engineering
■ Economics
■ Environment
Complicated by broad range of uncertainty
Northwest National Marine Renewable Energy Center007,04-23-09,TID
• 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
• Partners– NREL, Snohomish PUD, BioSonics, Sound & Sea Technology,
EPRI, Verdant Power, PNWER
Northwest National Marine Center
Northwest National Marine Renewable Energy Center
■ Environmental Effects (OSU/UW)
■ Site and Device Characterization (OSU/UW)
■ Array Optimization (OSU/UW)
■ Device Survivability/Reliability (OSU/UW)
■ Advanced Wave Forecasting (OSU)
■ Synergies with other Renewables (NREL)
008,04-23-09,TID
Center Activities
Northwest National Marine Renewable Energy Center009,04-23-09,TID
M. Kawase (UW-SO), B. Polagye (UW-ME), K. Thyng (UW-ME)
1D Channel Model
M2
ampl
itude
cha
nge
(mm
)
Area 1: Environmental Effects
Tidal range impact of 145 MW plant
Northwest National Marine Renewable Energy Center010,04-23-09,TID
Area 2: Mobile Testing
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 Center011,04-23-09,TID
Area 2 Detail: Shipboard Surveys
Water Quality
Bottom SamplingROV Survey
High-resolution Velocity Survey
Northwest National Marine Renewable Energy Center012,04-23-09,TID
Area 2 Detail: Stationary Surveys
300 kHz ADCP (velocity)
Lead Weight(600 lbs)
Mini-CTD (salinity and temperature)
Hydrophone (background noise)
Sea Spider (heavy duty fiberglass frame)
Acoustic release (redundant recovery)
Programmed for 4 month deployment
Northwest National Marine Renewable Energy Center013,04-23-09,TID
Area 3: Array Optimization
R/V Jack Robertson
A. Aliseda (UW-ME), J. Riley (UW-ME)
Wave-Current Flume:Experimental studies of device wakes.
Computer Cluster:Parallel simulations of array performance.
Northwest National Marine Renewable Energy Center014,04-23-09,TID
Area 4: Survivability and Reliability
M. Tuttle (UW-ME)
Studies of composite structural design options
Estimation of long-term durability of composites in salt water environment
Identification of composite materials that naturally minimize bio-fouling and corrosion
Northwest National Marine Renewable Energy Center015,04-23-09,TID
Biofouling in the Marine Environment
Clean Current turbine: 6 months deployment
Before After
Northwest National Marine Renewable Energy Center019,04-23-09,TID
Effect on Tidal Energy Devices
Reduced rotor performance― Orme, Masters, and Griffiths
(2001)― Rotors serviced every 2-4
years
Disrupted flow in diffuser― No service over device
lifetime (20+ years)― Very sensitive
hydrodynamics
Northwest National Marine Renewable Energy Center018,04-23-09,TID
Approaches to Minimize Biofouling
Biocide coatings―Effective―Significant toxicity―Tin-based banned, copper-based phased outInert coatings―Effectiveness―CostEngineered materials―Composites―Polymers
Northwest National Marine Renewable Energy Center016,04-23-09,TID
Preliminary Center Activities
Glass fiber in epoxy (uncoated)
Carbon fiber in epoxy (uncoated)
Low-copper coating (glass fiber in epoxy)
High-copper coating (glass fiber in epoxy)
Inert coating (rubber)
Aluminum (uncoated) Stainless steel
(uncoated)
Northwest National Marine Renewable Energy Center017,04-23-09,TID
Questions?
Northwest National Marine Renewable Energy Centernnmrec.oregonstate.edu (OSU - Wave)
depts.washington.edu/nnmrec (UW - Tidal)
top related