uib.no

U N I V E R S I T Y O F B E R G E N

The NORCOWE legacy-

data and instrumentation

J. Reuder1, M. Flügge1,2, M. Bakhoday Pakyabi1,3, B. Svardal21Geophysical Institute, University of Bergen

2Christian Michelsen Research3Nansen Environmental and Remote Sensing Centre

Geophysical Institute

uib.no

Overview

• The OBLO infrastructure• Why do we need it?• Overview NORCOWE campaigns• Some selected results• What can we do in the future?

Geophysical Institute

uib.no

OBLO (Offshore Boundary Layer Observatory)

• Advanced mobile equipment for offshore wind relatedmeasurements in the atmospheric and oceanic boundarylayer

• National Norwegian infrastructure project (2010-2020)• Funded by the Norwegian Research Council with ca. 4 M€• Instrumentation owned by the Geophysical Institute,

University of Bergen• Operated in close collaboration with Christian Michelsen

Research, Bergen, Norway• For more info: http://oblo.uib.no/

Geophysical Institute

uib.no

oblo.uib.noGeophysical Institute

uib.no

OBLO instrumentation

Geophysical Institute

Interest in future collaboration?Contact: joachim.reuder@uib.no

uib.no

MotivationGeophysical Institute

Source: http://www.ieawind.org/GWEC_PDF/GWEC%20Annex23.pdf

Of interest atmosphere: Average wind speed Wind shear over the rotor

disk Turbulence intensity

Of interest ocean: Average current Wave conditions

(slamming, breaking) Turbulence intensity

The main problem:Massive lack of observational data offshore

uib.no

Turbine atmosphere interaction - wakesGeophysical Institute

Source: http://galathea3.emu.dk/satelliteeye/projekter/wind/back_uk.html

Source:http://www.ict-aeolus.eu/about.html; Photo by Christian Steiness

uib.no

Interaction foundation-ocean-seabed - scourGeophysical Institute

Source: https://blogs.scientificamerican.com/but-not-simpler/scour-why-most-bridges-fail/

uib.no

Overview NORCOWE campaigns• Buoy deployment Sletringen (Nov 2010-Oct. 2011)• Lidar motion test at UiA, Grimstad (August 2011)• Lidar MEasurement Campaign at Sola airport (LIMECS;

March – August 2013)• WINd Turbine Wake Experiment Wieringermeer

(WINTWEX-W; November 2013 – May 2014)• Multi-Lidar measurement campaign at Lysefjorden

Bridge (May 2014)• Marstein field cruise (November 2013)• Karmøy field cruise (November 2014)• Offshore Boundary-Layer Experiment at Fino 1 (OBLEX-

F1; May 2015 – September 2016)

Geophysical Institute

uib.no

Buoy deployment SletringenGeophysical Institute

• Nov.2010- Oct. 2011 • Nearly one year of data for the

detailed characterization of the near coast conditions over the whole water column of 277 m depth

• Temperature, salinity, density, current, turbulence

uib.no

Lidar motion test GrimstadGeophysical Institute

WindCube V1 (CW)

ZephIR300 (pulsed)

Bosch Rexroth Boxtel 6-DOF E-motion 1500 Motion

System

Measurement test of two

moving LiDAR systems

versus their «grounded» counterparts.

Identify a suitable

commercial LiDAR system

for use on floating

platforms.

uib.no

Lidar motion test GrimstadGeophysical Institute

uib.no

WINTWEX-WGeophysical Institute

o 5 Nordex research turbines

80 m hub & rotor diameter (D)

x 6 upstream met masts

lidar profiler upstream at 3.2 Dlidar profiler downstream at 1.7 Dlidar profiler downstream at 3.4 Dscan. lidar downstream at 12.2D

ECN test site Wieringermeer, November 2013-May 2014

uib.no

WINTWEX-WGeophysical Institute

uib.no

WINTWEX-WGeophysical Institute

Surge Heave & Pitch of floater Surge Heave & Pitch of floater

uib.no

WINTWEX-WGeophysical Institute

Geofysisk Institutt

wind speed turbulence intensity

instantaneous

10 min avg.

uib.no

Multi LiDAR campaign at Lysefjorden bridgeGeophysical Institute

• Project managed by UoS and Norwegian Public Road Administration

• Investigate the wind field and associated turbulence structure along long bridge spans. Stimulate new LiDAR based measurement setups and corresponding data interpretation strategies.

• 5 x sonic anemometers mounted at the bridge• 1 x 3D scanning LiDAR (100s)• 2 synchronized continuous-wave short-range • WindScanner LiDAR’s (developed by DTU)

uib.no

Multi LiDAR campaign at Lysefjorden bridgeGeophysical Institute

May 2014

© Photos: UoS / UoB

uib.no

Multi LiDAR campaign at Lysefjorden bridgeGeophysical Institute

uib.no

Marstein and Karmøy cruisesGeophysical Institute

uib.no

Marstein and Karmøy cruisesGeophysical Institute

uib.no

Instrument and method developmentGeophysical Institute

uib.no

Instrument and method developmentGeophysical Institute

Applications: Whitecaps coverage

and air-sea interaction wave breaking Upper ocean

turbulence Surface gravity waves attitude monitoring and

motion correction

uib.no

U N I V E R S I T Y O F B E R G E N

OBLEX-F1: The Offshore Boundary Layer EXperiment at FINO-1

-Experimental setup and first results

J. Reuder1, M. Flügge1, S. Kral1, M. Bakhoday Pakyabi1, B. Svardal2, R. Frühmann3, E. Cheynet4, J. Bugonovic Jacobsen4, J. Bachmann5, B. Witha6, D. Wagner6, A. Fligg6, A. Külpmann6, J. Gottschall7, O. Outzen8, B. Gellately9, J. Shah9, B. Furevik10 , R.

Krishnamurthy11 , H. J. S. Fernando111Geophysical Institute, University of Bergen;

2Christian Michelsen Research; 3UL DEWI; 4University of Stavanger; 5FuE Kiel GmbH; 6University of Oldenburg; 7Fraunhofer Institute for Wind Energy and Energy System Technology IWES Northwest; 8BSH; 9AXYS Technologies

Inc.; 10Norwegian Meteorological Institute; 11University of Notre-Dame;

Geophysical Institute

uib.no

Location: FINO1 and Alpha VentusGeophysical Institute

Trianel

Borkum-Riffgrund 1

Alpha Ventus

Sour

ce: h

ttp://

ww

w.4

coffs

hore

.com

/offs

hore

win

d/

Sour

ce: h

ttps:

//com

mon

s.w

ikim

edia

.org

/wik

i/File

:Win

dpar

k_al

pha_

vent

us_L

agek

arte

.png

FINO1

FINO1, German Bight, May 2015 – September 2016 (atmospheric part); May 2015 – October 2015 (oceanic part)

uib.no

Measurement setup - AtmosphereGeophysical Institute

uib.no

Measurement setup - AtmosphereGeophysical Institute

3D scanning LiDAR

Radiometer

Sonic anemometers

uib.no

Measurement setup - OceanGeophysical Institute

BoUIB/OBLO

Bottom frame - ADCP, Aquadopp, ADV

IWES 2x LIDAR buoys

CMR Sailbuoy

Wave sensor, temperature

UIB/OBLOBottom frame

- ADCP, Aquadopp, ADV

UIB/OBLO MATS Submerged buoy

- Microrider shear probes, Aquadopp

UIB/OBLO Submerged buoy

- ADCP

UIB/OBLO Submerged buoy

- Current meter

BSH Wave buoy

Accelerometers,compass

AxysWindSentinelLIDAR buoy

uib.no

OBLEX-F1 research topics and questions• Stability dependency of offshore wind profiles• Characterization of turbulence (e.g. coherence)• Air-sea interaction and wave effects on wind profiles and

turbulence• Structure and dynamics of wind turbine wakes under

various stability conditions• Effects of adjacent wind farms on wind profiles and

turbulence characteristics• Comparison of instruments and measurement methods

• Oceanic turbulence in different wave regimes• Potential effects of a wind farm on current and

turbulence characteristics

Geophysical Institute

uib.no

Oceanic deploymentsGeophysical Institute

uib.no

Oceanic recoveryGeophysical Institute

Rapid biofouling at water temperatures> 18 ºC

uib.no

Geophysical Institute

Thank you for your attention!

Contact: joachim.reuder@uib.no

Geophysical Institute