Siting of Wind Farms in RI Coastal Waters: Wind Resources and Technology Development Index- Spaulding

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Siting of Wind Farms in RI Coastal Waters: Wind Resources and Technology Development Index presented May 24, 2011 at The Workshop to Learn Ocean Planning Tools and Techniques

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Siting of Wind Farms in RI Coastal Waters: Wind Resources and Technology Development Index- Spaulding

  1. 1. Siting of Wind Farms in RI Coastal Waters: Wind Resources and Technology Development Index Malcolm L. Spaulding Ocean Engineering, University of Rhode Island Workshop Applying Coastal Marine Spatial Planning to Energy Siting May 23-25, 2011
  2. 2. Goal: Develop and implement an open, transparent , objective procedure for selecting the location of an offshore renewable energy facility that maximizes power production, and minimizes cost and environmental and human use impacts.
  3. 3. Multi-Stage Screening Process Using Marine Spatial Planning Tools 1 st Tier – Hard constraints (irreconcilable difference in uses) System optimization: power production vs technical challenge (cost). 2 nd Tier – Ecological and human use impacts
  4. 4. Tier #1 Screening (Hard Constraints) Wind Resource  Adequate Wind Resources ( greater than 7 m/sec at 80 m, hub height) or similar for other ocean energy sources (≥1.5 m/sec currents, ≥ 10 kW/m waves) Exclusions  Navigation areas -regulated ( shipping lanes, precautionary areas, preferred routes)  Vessel tracks ( AIS data)  Ferry routes  Regulated areas ( disposal site, military areas, unexploded ordnance, marine protected areas)  Airport buffer zones  Coastal buffer zone ( 1 km)  Cable Areas (?)
  5. 5. Tier #1 Screening (cont’d)  Technology Development Challenge Water depth range, dependent on technology Mono-piles - 5 to 25 to 30 m Lattice jacket/tripod - 30 to 60 m Floating – 60 to 1000 m
  6. 6. Wind Resource Map, Southern New England
  7. 7. Estimates of 80 m wind speeds AWS TrueWinds data
  8. 8. Wind Roses, Southern NE
  9. 9. Wind Power Roses, Southern NE
  10. 10. RAM Meteorological Modeling Domains
  11. 11. RAM Meteorological Model Prediction, NW winds
  12. 12. Comparison of Model Predictions to Observations
  13. 13. Technology Development Index Objective: Develop a metric based on technical challenge to power production potential to screen for sites. TDI = TCI/PPP where TDI –Technology Development Index TCI- Technical Challenge Index PPP- Power Production Potential Presented in form of dimensionless values (predicted TDI divided by lowest TDI possible in area of interest)
  14. 14. Schafer and Hartshorn, 1965; Sirkin, 1982 End Moraines of Southeastern New England
  15. 15. Mohegan Bluffs, BI – Complex Stratigraphy
  16. 16. - Boothroyd and Sirkin, 2002 Mohegan Bluffs, BI – Complex Stratigraphy
  17. 17. Technology challenge for lattice jacket structures (Jonas, 2010)
  18. 18. AIS SERIES
  19. 19. Visualization Series
  20. 20. TDI- In stream tidal current Threshold - 1 m/sec Threshold – 1.3 m/sec
  21. 21. Block Island Topography and Land Cover
  22. 22. Observed Wind Speed and Power Roses
  23. 23. NW wind case – October 30, 2008
  24. 24. SW Wind case –July 8, 2008
  25. 25. Model predicted average wind speed at 10 and 80 m
  26. 26. Extreme Waves in Vicinity of Block Island Bathymetry Wave rose Extreme Wave Amplitude Once in 100 yrs
  27. 27. High Resolution Technology Development Index- Block Island
  28. 28. High Resolution Application of TDI Block Island (state waters)
  29. 29. OCEANOGRAPHIC REGIONS Oceanographic variables SST STRATIFICATION FALL SPRING 12.5 m 27.5 m
  30. 30. GEOMORPHOLOGIC VARIABLES BOTTOM ROUGHNESS (J.King GRAIN SIZE : PHI MEDIAN SLOPE DEPTH
  31. 31. FALL SPRING Oceanographic Ecological
  32. 32. FALL TYPOLOGY Cluster fall Biodiversity Index Richness Index Dominant group Sakonnet 10 7.1 Demersal Skate&squid Deep 5.7 5.7 Medium game Mammals Rocky 7.5 7.1 Demersal RIS 9.5 8.6 Demersal Mammals Littoral 9.5 10 Demersal, skate&Lobster
  33. 33. SPRING TYPOLOGY Cluster Biodiversity Index Richness Index Dominant group Deep 6.5 8.4 Mammals (Demersal & Herring) RIS2 10 10 Demersal & Herring Rocky/BIS 6 8.4 Demersal & Mammals RIS 6 6.8 Herring & Mammals Littoral 5.7 6.3 Demersal& Lobster
  34. 34. Conclusions • Ocean SAMP very effective approach to planning for and siting offshore renewable energy facilities: comprehensive, inclusive, cost effective, and consistent with state and federal regulatory framework. • Marine spatial planning (MSP) powerful tool to assist in siting decisions and assessing tradeoffs (new tools: technology development index, ecosystem valuation approaches(in progress))

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