NORCOWE - Norwegian Centre for Offshore Wind Energy in brief Bergen... · OBLEX-F1 Offshore boundary layer experiment at FINO1 J. Reuder (UIB), B. Svardal (CMR), 15-Sept-15 Ilker

OBLEX-F1Offshore boundary layer experiment at FINO1

J. Reuder (UIB), B. Svardal (CMR), 15-Sept-15Ilker Fer, M. Paskyabi, H. Bryhni, V.Kumer UIB), M. Flugge, S. Stavland, D. Peddie (CMR), L. Hole (MET)

J. Reuder, Geophysical Institute, University of Bergen

Marine Atmospheric Boundary Layer (MABL)

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

• Of interest:

– Average wind speed– Wind shear over the rotor

disk– Turbulence intensity

• These parameters depend on:

– Synoptic situation– Temperature stratification– Underlying ocean wave field– Proximity to land

• The main problem:

– Massive lack of observational data in the relevant altitude range (30-250 m)


Oceanic Mixed Layer (OML)


• Of interest:

– average currents and shear– surface waves– wave breaking– turbulence intensity

• These parameters depend on:

– Synoptic situation, in particular the wind field

– bathymetry– tides


complex wind profiles (from FINO1)

Kettle,A.J., Unexpected vertical wind speed profiles in the boundary layer of the Southern North Sea.

Journal ofWindEngineering&IndustrialAerodynamics(2014), http://dx.doi.org/10.1016/j.jweia.2014.07.012


(limited) model accuracy offshorevalidation of 5 BL parameterization schemes in WRF against FINO 1 measurements

Krogsæter, O. and Reuder, J. , Validation of boundary layer parameterization schemes in the Weather Research and Forecasting Model (WRF) under the aspect of offshore wind energy applications - Part I: Average wind speed and wind shear. Wind Energy, DOI: 10.1002/we.1727, 2014.


NORCOWE approaches

modelling on various scales

– requires measurement data for model initialization and validation

analysis of available MABL data sets (e.g. FINO, ASIT)

– for an improved undestanding of the relevant physicalprocesses

instrument and method development (turbulent fluxes in the atmospheric and oceanic boundary layer, lidar)

design and realization of measurement campaigns (LIMECS/Sola, WINTWEX-W/ECN, Lysefjorden, FINO1)

Scientific goals

Slide 7 / 15-Sep-15


• MABL stability - wind, temperature & humidity profiles• Air-sea interaction• Numerical model validation• Motion correction techniques

Industrial motivation

• Validation of models for turbulence and wake effects

• Development of wind farm optimization tools

• Geophysical basis data for the estimation of loads

• …

Slide 8 / 15-Sep-15

OBLEX-F1 status & schedule

Campaign period :

FINO1 met instrumentation: 18 May 2015 –> June 2016

Oceanographic deployment: 6 June 2015 –> October 2015

(Recovery cruise with Håkon Mosby planned for end of october)

Windsentinel lidar buoy: 22 June 2015 –> Desember 2015

CONFIDENTIALSlide 9 / 15-Sep-15

FINO1 research platform

Slide 10 / 15-Sep-15

FINO1 metmast & Alpha Ventus


- 100m metmast

- AV: 40 MW (6x REPower 5M, 6x Areva Wind M5000-116)- EWE AG

Neighboring wind farms


2013 2015 2017

Alpha Ventus& FINO1

Trianel

Borkum-Riffgrund 1Borkum-Riffgrund 2

Innogy Nordsee 1

Delta Nordsee 1

MEG Offshore 1

Measurement concept


Wave buoy

Scanning lidar #1Windcube 100s

Scanning lidar #2Windcube 100s

Microwave radiometerRPG-HATPRO G4

Wave camera

2x DCF turbulence sensors


Windcube V1(DEWI)

Bo

UIB/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 buoyAccelerometers,

compass

AxysWindSentinelLIDAR buoy

Activities, data handling

V1 VAD Lidar data (DEWI)

Metmast data and correction

(DEWI)

OBLEX F1(Norcowe)

Dual Lidar WindSentinel buoy

(AXYS)

Data filtering and validation

(CMR, UiB)

Alpha Ventus SCADA(ForWind/RAVE)

Database access(Norstore + Metawind)

Wave data(BSH)

Scanning lidars


- Online lidar instrument control and webcam monitoring - Realtime wind data access

Horisontal scans – wake effects

Vertical wind profiles

Microwave Radiometer- temperature and humidity profiles


Breaking wave camera

• Measurement system in development at UIB

• Video analysis of white capping coverage


Thank you for the attention


Backup slides


DCF systems

DCF

ADV


Metmast


Wind speed distribution

Source: Neumann and Nolopp 2007



Temperature



Humidity



Windcube 100S scanning LIDAR

• Scanning range: 3500 m

• Range resolution: 25-100 m

• 240 user programmable gates

• Azimuth range: 0 -360 deg

• Elevation range: -10 – 190 deg

• Data accumulation time: 0.5 – 10 s

More info at: http://www.leosphere.com/products/3d-scanning/windcube-100s200s400s-turbulence-wind-lidar


http://www.leosphere.com/products/3d-scanning/windcube-100s200s400s-turbulence-wind-lidar

RPG-HATPRO-G4 radiometer

Passive microwave radiometer

• Scanning range: 1000 m

• Range resolution: 30-50 m for temperature200 m for humidity

• Azimuth range: stationary

• Elevation range: 0 – 90 deg

• Data accumulation time: > 1 s, user defined

More info at: http://www.radiometer-physics.de/rpg/html/Products_Radiometers_Profilers.html


http://www.radiometer-physics.de/rpg/html/Products_Radiometers_Profilers.html

DCF- system

Sonic turbulence meter

• Gill R3-100 USA, Crossbox NAV440 (IMU)

• MOXA UC-7420 (datalogger)

• Point measurement at 15m / 20 m

• Measurement frequency: 1 – 100 Hz

More info at:

http://www.memsic.com/inertial-systems/NAV440CA-200





Wave camera

• Wave breaking, white capping coverage

• Video analysis

Slide 31 / 15-Sep-15 CONFIDENTIAL

SailbuoyUnmanned mobile and programmable ocean platform designed to support a wide variety of instruments, and measurements of both oceanographic and meteorological data

Configuration for FINO 1:

• Wave measurements

• Sea surface temperature

• Comparison of Sailboy wave sensor (Datawell - MOSE G1000) with wave buoy moored at FINO1

• Length: 2 m,

• Height: 1.13 m

• Payload weight: 15 kg

• Propulsion: wind

• 2 way communication: Iridium, GSM, VHF


Bottom frameAD2CP, Aquadopp and ADV, near to the sea bottom (28 m bmsl)

• High frequency current profile measurements

• Sampling of turbulence intensity and Reynolds stress

• Measurement of surface waves

• Near sea bottom current measurements


MATS buoy

• Microrider - turbulence shear probes

• Aquadopp – point current meter

Slide 34 / 15-Sep-15 CONFIDENTIAL

Submerged buoys

AD2CP, ADV and IMU

• High frequency current profile measurements in the upper layers of the water column

• Sampling of turbulence intensity and Reynolds stress

• Measuring effects of wave breaking on turbulence generation


Documents

NORCOWE - Norwegian Centre for Offshore Wind Energy in brief Bergen... · OBLEX-F1 Offshore boundary layer experiment at FINO1 J. Reuder (UIB), B. Svardal (CMR), 15-Sept-15 Ilker