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Offshore Wind System Design Lessons from Oil & Gas Industry
Jim O’SULLIVAN – VP Technip North America NREL, January 2013
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Table of contents
1. Conclusions From DOI/DOE Workshop Presentation 4/12
2. Oil Patch Practices – Value Engineering
3. New Tool For Offshore Floating Wind Generation
1. Conclusions From DOI/DOE Workshop Presentation 4/12
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Conclusions
Oil & Gas Industry has the design history and tools for offshore wind
Industry has a demographic hole – very little Generation X
Assets not positioned well for US East Coast developments
Health, Safety and Environment is the oil & gas industry credo
Focus on whole system and keep it simple – best route to improvement
Offshore wind currently in a period of negative learning curve
2. Oil Patch Practices – Value Engineering
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Value Engineering with TRIZ 6
Value engineering is a systematic process applied by a multidisciplinary team to improve the value of a project through the analysis of functions.
It seeks to improve the “Ideality” of a system.
The system should be viewed functionally in its entirety.
Value Engineering Definition
Onshore Substation
Onshore Cable
Offshore Export Cable
Array Cables Foundations WTG
Substation
Foundation Topsides Electrical
7 Value Engineering with TRIZ
Information Phase : Define challenges functionally at system level
Functional Analysis Phase : Understand relationships of whole with its parts
Creative Phase : No “sacred cows” or “taboos” in creating ideas
Evaluation Phase : Avoid romancing ideas – prepare selection criteria early
Development Phase : Avoid over development before “road testing”
Introduction Phase : Have cost/benefit arguments ready
Value Engineering Process
Information Functional Analysis Creative Evaluation Results
OK ? Development Introduction Yes
No
& Good Luck !
3. Tool For Offshore Floating Wind Generation
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MLTSIM-FAST for a Floating Wind Turbine
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FAST (18 DOFs of Wind Turbine)
Rotor Dynamics
Blade Structural Dynamics
Tower Structural Dynamics
Hydrodyn (6 DOFs of Floating Platform)
Added Mass/ Radiation Damping
Linear Diffraction
Quasi Static Mooring
MLTSIM (6 DOFs of Floating Platform)
Added Mass/ Radiation Damping
Linear Diffraction
Sum & Difference 2nd Order Diffraction
Nonlinear F-K Force
Viscous Loads
Quasi Static Mooring
Nonlinear FE Mooring
Coupling between FAST & MLTSIM
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FAST (18 DOFs of Wind Turbine)
Rotor Dynamics
Blade Structural Dynamics
Tower Structural Dynamics
MLTSIM (6 DOFs of Floating Platform)
Added Mass/ Radiation Damping
Linear Diffraction
Sum & Difference 2nd Order Diffraction
Nonlinear F-K Force
Viscous Loads
Quasi Static Mooring
Nonlinear FE Mooring
6 DOF Displ. & Vel. of Platform
Added Mass, Hydrodynamic Loads
& Mooring Dynamics
Solve 24 DOF Integrated System Simultaneously
TLP Wind Turbine
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Tower Base Moment
0 0.125 0.25 0.375 0.50
0.5
1
1.5
2
2.5
3x 1010
frequency (Hz)
resp
onse
((kN
·m)2 -s
ec)
MLTSIM-FASTMODEL TEST
Tendon Ringing
0.99 0.995 1 1.005 1.01 1.015 1.02
x 104
0
5000
10000
15000
MLTSIM-FAST
resp
onse
(kN
)
2900 2950 3000 3050 3100 3150
0
5000
10000
15000
MODEL TEST
time (sec)
resp
onse
(kN
)
0 0.1 0.2 0.3 0.4 0.50
10
20
30
40
50
60
70
80
frequency (Hz)
resp
onse
((m
)2 -sec
)
MLTSIM-FASTMODEL TEST
Low & Wave Frequency Response
HYWIND
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A Continuing History Of Platform Design, Fabrication And Delivery
www.technip.com
Thank you
