Welcome to Task 23 – Subtask 2: Research for Deeper Waters Part B

All of the presentations and reports are part of the of public record.

The following FTP information takes you to the research results of Subtask 2 Codes Comparison Collaborative  (OC3)

*Hostname: ftp.ieawind.org
Username: task23@ieawind.org
Password: OC3 (Case Sensitive)

Offshore Code Comparison Collaboration (OC3)

The following is an outline of the documents and presentations for Subtask 2 actual documents for download are available through the FTP information above.*

Phase IV Simulation Results

Rev1
Rev2
Rev3
Rev4
Rev5

Phase III Simulation Results

Rev1
Rev2
Rev3
Rev4
Rev5  NoBuoyancy
Rev5  NoBuoyancy  PlusNewComers
Rev6
Rev7
Rev8
Rev9

Phase II Simulation Results

Rev1
Rev2
Rev3
Rev4

Phase I Simulation Results

Rev1
Rev2
Rev3
Rev4
Rev5
Rev5_PlusNewComers

Baseline Turbine Description

Read Me.txt

NREL Offshore Baseline 5MW.pdf
NREL Offshore Baseline 5MW.xls

DISCON.f90
Cylinder1.dat
Cylinder2.dat
DU21_A17.dat
DU25_A17.dat
DU30_A17.dat
DU35_A17.dat
DU40_A17.dat
NACA64_A17.dat
Coordinate system.pdf

Code Fidelity Matrix

OffshoreWindTurbineModelFidelityMatrix.xls

Turbulence

Mann_turbulence_IEA_OC3.pdf
Mann_turbulence_IEA_OC3_update1.pdf
Mann_turbulence_IEA_OC3_update3.doc
oc3_11ms_polar6_6u.int
oc3_11ms_polar6_6v.int
oc3_11ms_polar6_6w.int
oc3_11ms_rect6_6u.bin
oc3_11ms_rect6_6v.bin
oc3_11ms_rect6_6w.bin
oc3_18ms_polar6_7u.int
oc3_18ms_polar6_7v.int
oc3_18ms_polar6_7w.int
oc3_18ms_rect6_7u.bin
oc3_18ms_rect6_7v.bin
oc3_18ms_rect6_7w.bin
TurbSim11msPolar6.doc
TurbSim11msRect6.doc
TurbSim18msRect6.doc

Turbulence_format_comparison_OC3.pdf

Wave Input Files

Waves-1

The above file contains:

IrregAiry_kinematics.txt
IrregAiry_surface.txt
ReadMe.pdf
RegAiry_format.xls
RegAiry_kinematics.txt
RegAiry_surface.txt
RegSF_kinematics.txt
RegSF_surface.txt

Monopile Foundation

Memorandum Derivation and Description of the Soil-Pile-Interaction Models
Analysis of Individual Piles and Drilled Shafts Subjected to Lateral Loading
Soil Pile Interaction Model
Soil-Pile-Interaction Models Read Me
Coupled Springs Matrices

Tripod Support Structure

45m tripod
Tower Definition NEW

Floating System

Conference Papers and Journal Articles

Gigawind5 OC3 Passon_Kuehn
Science of Making Torque from Wind Paper - OC3 Overview and Phase I Results
2007 European Offshore Wind Conference - OC3 Phase II Results
2009 AIAA Aerospace Sciences Meeting - OC3 Phase III Results

Background  Scope  Approach/Phases  Collaboration

SUBTASK 2
OFFSHORE WIND – TECHNICAL RESEARCH FOR DEEPER WATER (> 30m)
All of the significant experience with offshore wind turbine foundations and support structures has been with either monopiles or gravity based foundations in water depths less than 30-metres. Some member countries are interested in alternative technology applications that will allow turbines to be placed in water depths greater than 30 m because they do not have abundant sites with shallow water (e.g. Japan, Italy, Spain, Ireland, Portugal, UK, and the USA), and some countries may be interested in deeper sites to mitigate potential visual impacts from the coastlines. To successfully deploy wind turbines in these depths, alternative fixed-bottom support structures or floating platforms may be necessary.

There is no significant offshore wind industry experience with floating platforms yet. The oil and gas industries, however, have deployed thousands of floating oil-drilling platforms in depths up to 2-kilometers. Drawing from this experience, the wind industry can develop floating platforms by building on these offshore technologies but the costs must be reduced substantially. Some of the proposed R&D work that may be considered for alternative platforms and structures are:

• Development of low cost anchoring and moorings systems suitable for offshore wind installations in varying water depths.
• Optimization studies to determine lowest-cost options for floating platforms.
• Coupled platform dynamic modeling – understanding research requirements.
• Exchange data on manufacturing and materials benefits arising from floating platform requirements.
• Share experience and technical data pertaining to marine ecology, regulatory requirements, and permits in deep water and installations far from shore.