The Power Platform - SUT · • Steel Gravity Based Structure • Wind – 1x Wind Turbine • Wave...
Transcript of The Power Platform - SUT · • Steel Gravity Based Structure • Wind – 1x Wind Turbine • Wave...
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The Power Platform Offshore Renewable Energy’s Future
Phil Brown – MD. Wood Group Kenny Eoghan Quinn – Global Renewable Solutions
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-‐ Overview of the Concept
-‐ Global Renewable Solu8ons (GRS)
-‐ Wood Group Kenny (WGK)
-‐ WGK Scope of Work
-‐ GRS Scope of Work
-‐ Next Steps
Agenda
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Integrated System:
• Steel Gravity Based Structure • Wind – 1x Wind Turbine • Wave – 6 x OWCs • Water Depth 20 – 30 m
Overview the concept
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Overview the concept
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Global Renewable Solutions:
• Australian and Irish Registered • Patented technology • Integrators rather than Developers
About GRS
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About WoodGroup
John Wood Group Plc
! SURF / pipelines ! Engineering and Project Mgt ! Integrity Management ! Marine Engineering ! Structural Engineering ! Naval Architecture ! Power / Control Systems ! Installa8on Engineering
! Facili8es Engineering ! Onshore Pipelines ! Process, Plants & Industrial
! Opera8ons ! Brownfield ! Consultancy Services
43,000 employees in 50 countries with revenue circa. $7 billion
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Conceptual Work
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WGK Scope
Basis of
Design
Structural
Analysis
Intact and Damage stability
Mo8on Analysis
Constructability Assessment
Execu8on Plan
Cost Es8ma8on
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Consolidates the key design data used for conceptual engineering.
Prime focus on minimising CAPEX and OPEX, while presenting a robust and safe concept.
CAPEX steelwork, wind turbines, OWC turbines, electrical power cable, transportation, installation, commissioning.
OPEX maintenance frequency
Basis of Design
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Design Criteria:
• In-place Storm Survivability • Towing and Installation Strength • Foundation Engineering
Prelim Analysis to provide:
• Sizing for the structural components • Estimate overall weight for
! other engineering analyses ! cost estimation
Structural Analysis
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Engineering Approach Offshore and O&G industry procedures, analyses and assessments combined with: • innovative approaches • guidelines for renewable energy
systems
Global and local models: Detailed CFD FEA methods Structural software Hydrodynamic simulations
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Engineering Approach CFD model for Analysis of the OWC chambers located within the wave splash zone subject to constant wave impact
Loads were then transferred to an FE model for structural analysis
Video here
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Hydrostatic stability during the tow and prior to installation
Ensure sufficient stability for possible scenarios
Define the suitable ballast for wet towing under extreme conditions
Intact and Damaged Stability
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Hydrodynamic and motions analyses at free floating and towing
Challenge: novel geometrical shape + wind turbine assembly installed at high elevation.
Output: RAOs, added mass, damping and stiffness matrices
Goal: Determining response in various sea state conditions
Motion Analysis
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Structural layout
Structural Design
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Possible and likely methods of construction based specific regional methods
Includes all the aspects
Strategy to eliminate the need for any large marine lifting equipment
Concept to be fully assembled, pre-commissioned and tested before being transported to site and installed
Constructability
Video here
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to procure, fabricate, transport and install the Power Platform structure and its components
Recommendations • prequalify contractors • investigate local capabilities • perform studies • engage Marine Warranty Surveyor
early • establish crane capabilities
Execution Plan
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Costs were calculated for both an individual and for 6 units
Definition of the basis for costs and cost estimation
Cost Estimate
Video here
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GRS Scope
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Power Platform – Technology testing steps
Physical & Numerical Established a comprehensive testing plan for both numerical and physical assessments.
1.Tank Testing: HMRC expertise in wave energy tank testing. Developing results in a stage gate process to allow third party validation.
2. Numerical: WaveC carried out a detailed study based on a WAMIT model.
3. Conclusion: Results comparison
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Site Requirements – Design Point
WAMIT: Using the 3D numerical-diffraction model. The main outcomes are the hydrodynamic coefficients of added mass and damping along with the complex amplitude of excitation force.
Both testing programs were carried out in a detailed panchromatic and monochromatic wave environment with similar objectives in an effort to assess results.
The concept was assessed matching it to a specific site location (Scatter Diagram), Belmullet, Co. Mayo, Ireland.
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WAMIT Testing
Using the mesh design, GRS was able to gain an understanding of the efficiency of the design. With cost reduction in assessing alternative layouts (skirt).
Adapting turbine specifications to the model enabled us to feed information directly into the economic model.
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Results comparison The results were compared using Response Amplitude Operators (which basically give the ratio of the vertical excursion of the internal free surface and the amplitude of the incoming wave)
Fit between numerical and physical very good and with 5% margin error throughout both tests.
Conclusion: WaveC model now allows GRS to adapt testing results to alternative scatter diagrams.
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Eoghan Quinn Global Renewable Solutions [email protected] Tel: +61 3 9602 0700 Mob: +61 400 933 448