Offshore Wind Research at UiS

Norwegian Offshore Wind Cluster – Dublin 2018

Dr. Lin LiLin.li@uis.noDepartment of Mechanical and Structural Engineering and Materials ScienceFaculty of Science and TechnologyUniversity of Stavanger (UiS)

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StavangerOil and Energy Capital of Norway

1600 faculty, administration and service staff 12000 students 1560 international students 265 PhD students

Faculty of Science and TechnologyStrategy 2017-2020

Main strategic areas

• Oil and Energy• Ocean *• Health• ICT and Infrastructure• Safety

Excellent research and education3

Offshore Wind Energy

Programme Areas of Research

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• A new research programme area 2018 -2020“Ocean Technology Innovaton Cluster Stavanger” – OTICShttp://www.uis.no/otics

• Research programme area 2015 -2019Computational Methods in Offshore Technology – COTECH

• Research Network for Sustainable Energy at UiS and NORCEhttps://www.uis.no/research-and-phd-studies/research-areas/oil-gas-and-sustainable-energy/sustainable-energy/about-the-network/

NORCOWE – NORCE UiS UiB UiA

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6 PhD projects at UiS:

1. Wave-wind interactions and implications for offshore wind turbines – Siri Kalvig

2. Offshore Structures Exposed to Large Slamming Wave Loads – Jithin Jose

3. Aerodynamic loads on a wind turbine rotor in axial motion – Lene Eliassen

4. Breaking wave impact forces on a vertical pile - Sung-Jin Choi

5. Strategies for integrated work management system and development of effective operational

infrastructure - Ole-Erik Vestøl Endrerud

6. Offshore Wind Turbines Supported by Monopiles - Arunjyoti Sarkar

• Norwegian Centre for Offshore Wind Energy (Norcowe). • From 2009 -2017 (CMR, Uni, UiA, UiB, UiS, Alborg) • Part of the Norwegian FME scheme.

Offshore Wind Farm Management System

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Historical weatherInfrastructure and logistics

Vessel spreadTurbine info

Weather downtimeCost

ScheduleVessel spread

Ole Erik Endrerud

Offshore Wind Energy*

Department of Mechanical and Structural Engineering and Materials Science (IMBM)

Scientific UiS- members per today:1. Professor Muk Chen Ong2. Professor Jasna B. Jakobsen3. Assoc. Prof. Charlotte Obhrai4. Assoc. Prof. Knut Erik Teigen Giljarhus5. Assoc. Prof. Idriss El-Thalji6. Post Doc. Dr Lin Li7. Post Doc. Dr Etienne Cheynet8. 4 PhD Candidates

7Website: https://www.uis.no/tn-fakultet/institutt-for-maskin-bygg-og-materialteknologi/

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People at IMBM in Offshore Wind Energy

Website: https://www.uis.no/tn-fakultet/institutt-for-maskin-bygg-og-materialteknologi/

Full Scale Measurements of Wind Turbulence for structural engineering and wind energy applications

Illustration of the floating bridge concept. (Foto: SVV / ViaNova / Baezeni)

Wang, J. et al. (2018), Coupled aerodynamic and hydrodynamic response of a long span bridge suspendedfrom floating towers, J. Wind Eng.& Ind. Aer. 177: 19-31. Jakobsen et al. (2015). Assessment of wind conditions at a

fjord inlet by complementary use of sonic anemometers and lidars. Energy Procedia. 80: 411-421

Dr. Eitenne Cheynet

Deployment of a long range LIDAR at a brigde site(UiS, UiB, CMR, 2014 )

Prof. Jasna B. Jakobsen

Analysis of Met-mast Wind Measurement Data

3D sonicanemometers

81.5 m a.s.l.

61.5 m a.s.l.

41.5 m a.s.l.

Cheynet, E., Jakobsen, J. B., & Reuder, J. (2018). Velocity Spectra and Coherence Estimates in the Marine Atmospheric Boundary Layer. Boundary-Layer Meteorology, 1-32.

unstable

neutral

stable

Met-mast at FINO1 platform

Along-wind turbulence spectra as function of atmospheric stability

NORCOWE LIDAR Measurements at FINO 1

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Wind turbulence analysis

Cheynet, E. et al, (2016). Wind Coherence Measurement by a Single Pulsed Doppler Wind Lidar. Energy Procedia. 94:462-477.

Along-wind turbulence length scale for increasing distance from LIDAR.

COTUR Project - UiB NORCE UiS & Equinor

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• Horizontal distance betweenLIDARS (60-120m)

• Enable horizontal coherence to be measured for offshore windconditions

• Distances relevant for offshore wind turbines

• Measurement Campaign will be 1 Year

Obrestad Lighthouse

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Dynamic Analysis of Floating Offshore Wind Turbines (1)

Prof. Muk Chen Ong

Dr. Lin LI

Analysis of Floating Horizontal and Vertical Axis OWTs

Installation of Bottom-fixed and Floating Wind Turbines

Master Thesis - A Study of the Coherences of Turbulent Wind on a Floating Offshore Wind Turbine now extended to a PhD Project

Associate Prof. Charlotte Obhrai

Dynamic Analysis of Floating Offshore Wind Turbines (2)

Computational Fluid Dynamics (1)

Breaking Wave Loads onWind Turbine Substructures

Scour around Wind TurbineFoundations

Prof. Muk Chen Ong

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Wind-wave interaction

Wind turbine on a fish feading barge

Turbulence modelling

Associate Prof. Knut Erik Giljarhus

Computational Fluid Dynamics (2)

Breaking and Extreme Wave Loads on OWT

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WAVESLAM ProjectWave tests in the Large

Wave Flume FZK.

DeRisk Project : De-risked extreme wave loads for offshore wind energy – DTU Oxford UiS DHI StatkraftEquinor

Associate Prof. Charlotte Obhrai

Failure Analysis and Monitoring of Mechanical Components

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Associate Prof. Idriss El-Thalji

Bearing of a land-based wind turbineWear evolution monitoring at UiS