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7 juli 2016 Deltares offshore wind Jan-Joost Schouten Senior Project Manager Offshore Wind TKI Wind op Zee Internationale afstemming Van Oord
7 juli 2016
Deltares offshore wind
Jan-Joost SchoutenSenior Project Manager Offshore Wind
TKI Wind op Zee
Internationale afstemming
Van Oord
Contents of presentation
o Introduction to Deltareso Deltares’ portfolio in offshore windo Project examples
• Done• FLOW projects• MERMAID• Nordergründe Offshore Wind Farm• Borssele Wind Farm Sites
• Doing • JIP Wifi• OHVS in German Bight
• To be done• JIP initiatives
o RECAP - R&D themes of Deltares ambitions in offshore wind
Deltares - Applied Research Institute
7 juli 2016
Deltares
• Delta Engineering
• Delft and Utrecht
• 900 fte
• Applied Industrial Research
• International > 28 nationalities
• Branch offices in Singapore, USA, Jakarta,
UAE, Rio de Janeiro
• Projects in > 80 countries
• Open-source policy: dare to share
• Extensive hydraulic/geotechnical laboratories and
computer modeling facilities
Deltares’ activities in offshore wind
Hydrodynamics
• Metocean/environmental conditions (waves, currents, water levels)
• Operational forecasting systems (for installation and O&M)
• Wave loads / impacts on foundations
Geotechnics
• Geotechnical design of foundations (e.g. cyclic liquefaction)
• Pile installation techniques (impact-driving, vibrating)
• Cable burial techniques (jetting, ploughing, trenching, self-burial)
• External threats to electricity cables (anchors, fishnets, objects)
Morphology & morphodynamics
• Offshore geology, seabed characteristics
• Scour and scour protection for all kinds of foundations
• Bed level changes due to morphodynamics (e.g. sand waves)
• Cable routing and site selection in morphodynamic areas
Offshore surveying
• Seismic, sonar and other hydrographic surveys
7 juli 2016
7 juli 2016
Scope of individual departments
Deltares offshore wind
Hybrid modelling
Combining the strengths of:
• Physical modeling (in hydraulic and geotechnical scale models)
• Numerical modeling (including software development)
• Engineering software tools (for quick assessments)
• Validation against field measurements
Wave impact against platform deck
Type of projects
•Dutch
• FLOW (& GROW)
• TKI WoZ
• NWO STW (EUROS)
• Consultancy
•EU
• Consultancy
• FP7 / H2020
• DemoWind 2
7 juli 2016
FLOW: Far and Large Offshore Wind
Goals
• speeding up offshore wind developments
• reduction of costs and risks: 20% cheaper in 2020
R&D themes
1. Far offshore wind farm design (13)
2. Support structures (17)
3. Far offshore electrical systems and grid interaction (4)
4. Far offshore turbine development (17)
5. Risk, Cost & Benefit Assessment of FLOW (1)
• 52 research projects, Deltares involvement in 7 projects
• Varying from PhD-research to demonstration in the field
• Cooperation between contractors, energy utilities and knowledge
institutes/universities
TKI-Energy – Wind op Zee
• Natural follow-up of FLOW
• “Innovation Contract” signed in 2012
• Roadmap 2015-2020 & Knowledge Agenda 2016-2019
Goal
• 40% cost reduction in 2020 (rel. to 2010)
5 R&D Themes
1. Support structures
2. Wind turbine technology
3. Internal electrical network and HV grid
4. Transport, installation & logistics
5. Operation and Maintenance
Deltares involvement
• projects in progress (JIP WiFi, Chain Cutter)
• proposals submitted (JIP HaSPro, JIP SIMON)
• working on new proposals (JIP Cables, JIP SCALE)
7 juli 2016
Recently finished – FLOW projects
Deltares’ offshore wind projects
7 juli 2016
FLOW-SCOUR: Scour Prediction, Monitoring & Mitigation
1
234
Goal
• Reduce conservatism in scour prediction
• Optimize design of scour protection
• Framework to enable well-founded decisions between omitting or applying scour protection.
Project phases
• Scale model tests (2012-2013)
• “Scour Prediction Model”
• Field measurement campaign in OWP Luchterduinen
• Calibration/validation models
• Improve offshore guidelines
FLOW-GBS: Gravity Base Structures
Goal:
Design of alternative foundation for monopile, tailored for water
depths 30-50m, based on principle of Gravity Base Structure
Research topics for Deltares:
• Installation and ballasting
• Structural design of hybrid solution (steel & concrete)
• Cyclic response of soil (cyclic liquefaction potential)
• Scour protection design and installation method
• Wave loads (incl. breaking waves)
Research Goals:
I: Online determining of burial depth of electricity cables with DTS-technique
(based on thermal dissipation in the seabed), resulting in a continuous measurement of cable safety against anchors and thermal bottlenecks
7 July, 2016
FLOW-CABLES: Cable monitoring and morphodynamics
II: Development of morphological models for dynamic seabed features (e.g.
sand waves) to improve cable routing (new projects) or predict possible risk areas (existing projects). These models will be calibrated with the above measurement system.
FLOW-Meteo Dashboard 4 Irish Sea (RWE)
7 juli 2016
RWE’s offshore wind Farm in the
Irish Sea:
•Rhyl Flats
•North Hoyle
•Gwynt y Môr
etc
July 7, 2016
Automated data error
corrections
Database
offshore measurements
(metmast, ADCP, lidar)
forecasts overall model
(DCSM, ECMWF)
Detailed calibrated Wind
Farm model
Data assimilation &
Uncertainty bands
Operational
ForecastingSystem
Weather windows
RAO/Vessel movements
Scour predictor
Model
ApplicationTool
models…
models…
validated
measurements
FLOW - Meteo Dashboard (2/3) - Components
detailed
forecasts
Web interface
Earth Observations
(Modis, Sentinel)
7 juli 2016
FLOW - Meteo Dashboard (3/3)
7 juli 2016
Recently finished – other projects
Deltares’ offshore wind projects
Nordergrunde OWF
• Wind farm in morphodynamic area: migrating tidal flats and channels• Integrated approach:
• Determine relevant hydrodynamics• Predict seabed changes during lifetime• Predict scour development• Prepare scour mitigation strategies• Detailed design by physical model testing• Geotechnical lateral bearing capacity check
Falling apron behaviour,visualised by stereophotography
Borssele morphodynamics
2015-bathymetry - static bathymetry = mobile bathymetry
• Development of a Fourier-based method to separate all relevant morphodynamic features in the seabed
• Analyse their characteristics (dimensions, migration rates)
• Predict seabed changes until 2046, including uncertainty
Response to comments by DNV-GL (1)
MERMAID –EU project 1/2
7 juli 2016
• The project is entitled: ”Innovative Multi-purpose
offshore platforms: planning, design and operation” – or ”MERMAID.
• The project is being carried out over 4 years. From beginning of 2012 to end of 2015
• Total budget is 7.4 million Euro
• The project is comprised of 30 participants
WP1: Project management
WP2: Assessment of policy management and planning strategies
WP8: Economical, technical and environmental feasibility of multi-use platforms
WP9: Project dissemination & outreach activities
WP
7:
Inn
ova
tive
Pla
tfo
rm
pla
n a
nd
des
ign
Estuarine
Active Morphology
Open deep water
Sheltered deep water
WP
3:
Ren
ewab
le e
ner
gy c
on
vers
ion
fr
om
win
d a
nd
wav
es
WP
4:
Syst
ems
for
sust
ain
able
aq
ua-
cult
ure
an
d e
colo
gica
l bas
ed d
esig
n
WP
5:
Sin
tera
ctio
n o
f p
latf
orm
wit
h
hyd
rod
ynam
ic c
on
dit
ion
s an
d s
eab
ed
WP
6:
Tran
spo
rt a
nd
op
tim
izat
ion
of
inst
alla
tio
n, o
per
atio
n, a
nd
dec
om
.
Work-package structure
WP1 Project management
WP2 Policy, Management and Planning
WP3 Renewable Energy
WP4 Aquaculture
WP5 Physical conditions & Offshore technology
WP6 Optimisation of operation and transport related activities
WP7 Platform plan, design and integration
WP8 Economical feasability of MUP
WP9 Dissemination and outreach
MERMAID 24
North Sea Site
MERMAID –EU project 2/2
7 juli 2016
7 juli 2016
Ongoing projects:
Deltares’ offshore wind projects
JIP-WiFi
JIP-WiFi:
• Laboratory tests:• > 250 000 wave events
• > 500 slamming impacts• > 8TB data
Focus on wave statistics and breaking impacts
JIP-WiFi II:
• Wave load computations:• Simple slamming formulation
• Nonlinear wave model • CFD
Focus on “better” load computations
STW-Perspectief: EUROS
EUROS
Excellence in Uncertainty Reduction of Offshore wind Systems
• urgent need for solid scientific knowledge on which uncertainties predominantly affect cost of
energy and how a combination of uncertainties can best be dealt with, avoiding unnecessary addition of safety factors.
• EUROS provides knowledge and models that close this knowledge gap.
• EUROS covers three interrelated subjects:1 External conditions: models predicting uncertainty of wind and wave conditions and soil
conditions2 Loads and damage: models for failure mechanisms, dynamic fluid-structure-soil interaction and uncertainty of wind farm loads
3 Wind farm models: uncertainty model of a wind farm and structural reliability of the support structure.
• Project duration: 2015-2019
OHVS (1/4) - Connecting Wind Farms to the electricity grid
1. Direct connection to the onshore grid
OHVS (2/4) - Scour development
DolWin Beta
OHVS (3/4) - Scour development
DolWin Alpha and Gamma; BorWin Gamma
OHVS (4/4) - Hydrodynamic loading
7 juli 2016
New initiatives:
Deltares’ offshore wind projects
JIP HaSPro – Handbook Scour Protection Methods
WP 1: Digital Handbook
WP 2: Physical model tests
WP 3: Software design tool
WP 4: Recommended Practice (by DNV GL)
• Comparing scour protection methods
• Traditional rock protection
• Innovative protection systems
• Full range of offshore conditions
• Several structures/applications
• Monopiles
• Cables / cable crossings
• Suction bucket jackets
• All possible failure mechanisms
JIP SCALE
Vision:
“To create a large SCALE test campaign
addressing aspects which are not
measureable at medium or small scale.”
Method:
“We use the worlds largest wave flume for
realistic impacts on large SCALE
components. We take advantage of
economics of SCALE to make it feasible”
Work-packages
•Secondary-steel
•CAbles
•Loads
•Economics incorrect surface tension
correct surface tension
JIP Cables – slide 1/2
7 juli 20167 juli 2016
• WP 1: Meta-study of cable failures.
• WP 2: Improved modelling of governing
environmental processes.
• WP 3: Optimize cable layout and the maintenance / survey schedule.
• WP 4: Constant monitoring for early warning.
Reduced risks and
uncertainties
System understanding
Modelling
Planning and optimization
Monitoring
We want a framework, which can be applied to both existing and future wind farms.- Maximum impact and cost savings.
7 juli 2016
JIP Cables - slide 2/2
• Offshore cables have a fiber optic cable installed for communication and
remote sensing.• The fiber optic can provide accurate information about the state of the
cable and the surroundings.
• By measuring the state of the cable the burial depth can be accurately determined.
Measured and computed depth of
burial for export cable 2, Egmond aan
Zee OWF.
Regulatory
bodiesinformed
VIBRO / NS-VIP / JIP Simon (1/4)
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7 juli 2016
In coming years hundreds of monopiles installed for European offshore wind farms.
Roughly 25 % of wind farm investment spend on foundations ≈ 5 billion € until 2020
NS-VIP : Foundation installation costs can be reduced by > 5% through
• Faster installation
• Less noise, i.e. no expensive noise mitigation measures
• Lower loads i.e. lighter pile designs (longer design life)
VIBRO / NS-VIP / JIP Simon (2/4)
40
Material Point Method developed at Deltares with partner universities is unique in simulating
3D dynamic and quasi-static problems involving
• Arbitrary large soil deformations
• Soil-water-structure interaction
• Advanced soil modeling
Excess pore pressures Ceccato, 2014
VIBRO / NS-VIP / JIP Simon (3/4)
Joint Industry Project - Simulation of Installation of Monopiles
TKI Wind op Zee R&D proposal submitted
• Project duration September 2016 until September 2018
• Total budget of 860 k€ of which 650 k€ subsidy
• Notification August 2016
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VIBRO / NS-VIP / JIP Simon (4/4)
DemoWind 2 – Metocean Tool
7 juli 2016
• Partners:• Carbon Trust• MARIN• ECN• Seaspeed• JBA• Deltares
• Objective:• Integrate Meteo Dashboard with findings Offshore Maintenance JIP• Couple Meteo Dashboard with actual vessel movements
DemoWind 2 – Anchor penetration trials
7 juli 2016
motivation
• A study conducted 2013 by TenneT and BSH in the German Bight revealed that penetration behaviour of dragged ship anchors is less than anticipated
Aims• Gather sufficient evidence to determine ‘Depth of
Lowering’• Increase confidence amongst stakeholders• Build comprehensive database
• Deduct and/or confirm experimental scaling functions• Develop a practical engineering tool for prediction of
‘Depth of Lowering’ for future projects
• Further develop and verify numerical model
Benefits
• Substantial savings in cable installation (selection of lessexpensive tools, reduced offshore time)
• Less environmental impact to marine life and the sea
bed
Deltares’ R&D topics in Offshore Wind
On-going research topics in offshore wind
• Local fluid-structure-soil interaction (e.g. scour+mitigation, dynamic soil
response)
• (Breaking) wave loads (incl. floating structures)
• Pile and cable installation techniques
• Large-scale morphodynamics i.r.t. infrastructure (e.g. cable burial depth monitoring and prediction)
• Operational forecasting (incl. uncertainty bands, data assimilation, decision support systems, condition-based maintenance)
Envisaged extensions of research in offshore wind
• Interaction between wave loads and dynamic structural response (primary structure and secondary components)
• Windfarm layout and Cable route optimization
• Combined and hybrid modeling of fluid-structure-soil interaction (e.g. pile
fatigue due to changing seabed levels and dynamic soil response)
• Multi-purpose use of offshore wind farms
