Post on 12-Jul-2015
transcript
July 21, 2014
Deltares & Offshore Wind Energy
Jan-Joost Schouten
Senior Project Manager Offshore
Deltares
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Independent institute
Deltares is an independent institute that provides a high standard of expertise and advice.We work closely with governments, businesses, universities and research institutes in The Netherlands and abroad.
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Mission Statement
Developing and applying top level expertise in the area of water, subsurface and infrastructure for people, planet and prosperity.
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Facts and figures
• Legal form: foundation under Dutch law• 840 employees• Annual turnover 113 mln euro• Locations in Delft and Utrecht• Nationally and internationally active• Unique experimental facilities
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Sharing knowledge
• (Open source) software • Publications, data and models• Deltares Academy, workshops, conferences• (Research) projects• PhD-students, trainees, graduates
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Excellent expertise
1000039.005
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Organization chart
•Environmental legislation & marine spatial planning•Ecological impacts & risks•Hydrodynamic & morphological impacts
•Environmental legislation•Marine spatial planning
•Metocean (design) conditions•Wave impact and wave runup•Hydrodynamic & morphological impacts•Scour and morphology•Seabed morphodynamics
•Geotechnics of foundations and cables•Seabed morphodynamics
Organization chart & Offshore Wind
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Deltares capabilities in offshore wind
•Metocean conditions
•Scour and morphology
•Geotechnics
•Seabed morphodynamics
•Marine spatial planning & environmental legislation
•Ecological impacts & risks
•Hydrodynamic & morphological impacts
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Deltares capability metocean
•Metocean> Normal and extreme conditions> Data analysis tool - ORCA
> Statistics for the design basis> Numerical modelling of waves,
currents and water levels
> Weather window analysis for marine installations
> Operational forecasting & logistics
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Deltares capability Scour 1
•Offshore scour> Scour prediction
> Conceptual layout of scour protection> Optimisation by physical modelling > Evaluation of field data
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Deltares capability Scour 2
•Example of physical model test: transparent pile with camera
before
after
current
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Deltares capability Scour 3/3
•Systematic scour research> Example: JIP OSCAR> Objective: investigate scour at jack-up foundations> Systematic physical model tests for three spudcan types> Test database → scour formulae → software> PC tool OSCAR the scour manager
– Scour assessments / forecasting– Design of scour protection
> Field validation
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Deltares capability geo engineering 1/2
• Geotechnics• Site investigation and laboratory testing (speciality
cyclic loading)
• Foundation design (e.g. monopiles, GBS, suction piles)
• Installation (e.g. spudcan penetration, boring process)
• Geohazards (e.g. earthquake)• Tools:
> Geotechnical centrifuge
> Numerical models> Own software (e.g. D-Pile & D-Cycle)
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Deltares capability geo engineering 2/2
• Cables• Trenching
• Rock protection (anchors & fishing equipment)• Shore connection (horizontal directional drilling)
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Deltares capability engineering geology
• Sea bed morphodynamics• Analysis of sea bed morphodynamics
• Morphodynamics• Offshore geophysical surveys• Monitoring using Fiber-optic cables
• R&D• Research on numerical tool Delft3D
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Marine bedformsObj. 1:Morfodynamiek
bathymetrie NCP
zandbanken
zandgolven
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DTS: Monitoring sediment transport
1. Continuous monitoring of erosion and deposition with temperature measurements (Kornwerderzand)
2. The aquifer thermal energy storage project (Utrecht)3. Sand suppletion, offshore Workum (Friesland)
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•Sand suppletion, offshore Workum (Friesland)•Fiber-optic DTS (Digital Temperature Sensing)•Temperature measurements <0.1ºC resolution, spatial resolution <1 meter
DTS: Monitoring morphodynamics I
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•The fibre-optic DTS measurements clearly reflect the position of the nourishment and sandbars•changes in morphology of the nourishment can be deduced from the temperature signal
DTS: Monitoring morphodynamics II
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Deltares capability summary
Conclusions:• Wide range of applications to support the industry • (inter)national consultancy & research projects• Identification of research topics• Joint Industry Projects
• EU projects• Policy: dare to share
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Deltares capability
• Environmental legislation & marine spatial planning
• Ecological impacts & risks
• Hydrodynamic & morphological impacts
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Deltares capability Scour IV
•Scour protection alternatives> Loose rock> Block mattresses
> Frond mats> Collars> Rubber mats
rubber mat collar
artificial fronds
block mattresses
loose rock
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Processing of scour development
0
2
4
6
8
10
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14
0 1000 2000 3000 4000 5000 6000 7000 8000
time [s]
scou
r de
pth
[cm
] Tchar
S/Seq=63%
tend
• Seq = equilibrium scour depth
• Tchar = characteristic time scale
• t0 = time delay (collar tests)sand-water interface
pile
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Deltares capability Offshore Wind
•Metocean
•Scour and morphology
•Wave runup
•Geotechnics
•Seabed morphodynamics
•Environmental legislation & marine spatial planning
•Ecological impacts & risks
•Hydrodynamic & morphological impacts
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Metocean Database ADMA-OPCO
Metocean database
• for the oil fields offshore Abu Dhabi • for design and planning offshore activities• includes all relevant metocean parameters • both normal and extreme conditions
(waves, wind, current, water levels)