The Offshore Boundary Layer Observatory (OBLO) Possibilities for the offshore wind industry
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1 The Offshore Boundary Layer Observatory (OBLO) Possibilities for the offshore wind industry Prof. Peter Haugan, Prof. Joachim Reuder Geophysical Institute, NORCOWE Science Meets Industry 08. November 2016, Bergen
2 Met-ocean conditions important over wind farm life cyle 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 Source:
3 Met-ocean conditions important over wind farm life cyle MABL (Marine Atmospheric Boundary Layer) planning phase: wind resource assessment; design criteria for structural loads (e.g. occurrence of extreme winds) construction phase: weather windows favorable for marine operations (e.g. heavy lift operations) operation phase: o actual flow conditions (wind speed, turbulence intensity) o accessibility for O&M OML (Oceanic mixed layer) planning phase: design criteria for structural loads and excitation of movements (e.g. extreme waves) construction and operation phase: max. wave height for marine operations and WT accessibility; static and dynamic loads by currents, waves and wave breaking
4 Of particular interest: wake effects turbine/in-farm scale Wind turbine wake = reduced average wind speed + increased turbulence
5 Of particular interest: wake effects turbine/in-farm scale Effect on downstream turbines reduced power output and increased load and fatigue
6 Of particular interest: wake effects inter farm scale Source: ml Source:
7 OBLO infrastructure OBLO (Offshore Boundary Layer Observatory) ( advanced mobile instrumentation for field measurements of meteorological and oceanographic parameters related to offshore wind energy
8 OBLO infrastructure Norwegian Research Council infrastructure project, funded with approximately 4 M Established in 2010 by a succesful application in collaboration between NORCOWE and NOWITECH Owned by the Geophysical Institute, Operated in close collaboration between GFI and CMR Heavily used in the met-ocean measurement activities during NORCOWE For more information see oblo.uib.no or send an to joachim.reuder@uib.no
9 5 Static lidar wind profilers 3 Leosphere WindCube v1 1 Leosphere WindCube v2 866 (motion compensated) 1 Natural Power ZepIR 300 Profiles of wind speed, wind direction and turbulence intensity between ca. 20 and 300 m above ground Vertical resolution 20 m Typical applications: Inflow conditions Site characterization Average characteristics of single turbine wakes
10 NORCOWE campaign WINTWEX-W
11 NORCOWE campaign WINTWEX-W
12 NORCOWE campaign - WINTWEX-W Surge Heave & Pitch Surge Heave & Pitch of floater Hywind
13 3 Scanning wind lidar systems Leosphere WindCube 100 S Characterization of the wind and turbulence conditions up to a distance of 3.5 km from the instrument Spatial resolution 50 m Typical applications: Inflow conditions Advanced turbulence characterization (e.g. coherence) 3-D structure and dynamics of wind turbine wakes Investigation of wind farm wakes
14 NORCOWE campaign - WINTWEX-W wind speed turbulence intensity instantaneous 10 min avg. Geofysisk Institutt
15 2 passive microwave temperature/humidity profilers Radiometer Physics HATPRO RG4 Temperature and humidity profiles up to ca. 5 km above ground Liquid water content of clouds Vertical resolution 50 m Typical applications: Characterization of the stability of the atmosphere (key information for the interpretation of wind profile and wake measurements)
16 OBLO infrastructure - ocean Wide range of oceanic instrumentation (sensors) and instrument platforms (bottom frames, surface and submerged buoys, drifters) Temperature and salinity profiles Current profiles Wave characteristics Height Direction Frequency Oceanic turbulence Air-sea interaction
17 NORCOWE campaign OBLEX-F1 FINO1, German Bight, May 2015 September 2016 (atmospheric part); May 2015 October 2015 (oceanic part) One of the largest offshore wind campaigns so far worldwide Source: OBLO instrumentation was essential in this campaign Source: Trianel Borkum-Riffgrund 1 FINO1 Alpha Ventus
18 NORCOWE campaign OBLEX-F1
19 NORCOWE campaign OBLEX-F1 ocean Axys WindSentinel LIDAR buoy CMR Sailbuoy Wave sensor, temperature BSH Wave buoy Accelerometers, compass Bo UIB/OBLO Bottom frame - ADCP, Aquadopp, ADV UIB/OBLO Bottom frame - ADCP, Aquadopp, ADV UIB/OBLO Submerged buoy - ADCP UIB/OBLO MATS Submerged buoy - Microrider shear probes, Aquadopp
20 Invitation for future use of the OBLO infrastrucure In general (in particular after the finalization of NORCOWE in April 2017) accessible, both to Norwegian universities, other research institutes and relevant/interested industry/commercial actors Through OBLO GFI/UiB and CMR can provide required competence for: design, planning and realization of targeted field campaigns data handling and data analysis data storage Costs for rental/operation depend e.g. on type of project and data policy (open/closed) For more information see oblo.uib.no or to
21 Thank you for your attention! For more information: oblo.uib.no
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