Coherence of turbulent wind at FINO1
|
|
- Scot Stokes
- 5 years ago
- Views:
Transcription
1 Coherence of turbulent wind at FINO1 Charlotte Obhrai, University of Stavanger, University of Stavanger uis.no 4/5/2016 1
2 Overview Motivation Data selection Results Conclusion 2
3 Motivation Current wind turbine design standards allows for two different approaches to model the wind field used for engineering estimates The Mann turbulence model and the Kaimal wind spectra combined with a coherence function 3
4 FINO 1 To avoid mast shadow effects all wind directions in the red sector were excluded 4
5 Atmospheric stability PGT Stability Class Gradient Richardson Number A Ri < very unstable B <= Ri <-2.26 unstable C <= Ri < weakly unstable D <= Ri < neutral E <= Ri <0.196 weakly stable F <= Ri < 0.49 stable G 0.49 <= Ri very stable Temperature and wind speed data from the sonics at 80m and 40m were used to calculate the Gradient Richardson number to clasify atmospheric stability 5
6 Stationarity Removed non-stationary conditions based on the following two criteria Integral length scale Lux > 350m The stationarity of data was also determined by using a runs test (Bendat and Piersol 1986) as follows: 1. Divide the series into time intervals of equal lengths. 2. Compute a mean value (or other, see below) for each interval. 3. Count the number of runs of mean values above and below the median value of the series. 4. Compare the number of counts found to known probabilities of runs for random data. 6
7 Coherence under neutral wind conditions <= Ri < Data from January 2008 A total of 4464 records 40% were stationary, neutral and not in the mast shadow Results shown are for wind speed U= 10-11ms -1 7
8 Average cocoherence 20 m seperation 8
9 Compare 40m and 20 m seperation 9
10 Compare to the coherence in IEC Neutral conditions 10
11 Compare to the coherence in IEC Neutral conditions 11
12 Coherence under unstable wind conditions <= Ri <-2.26 Data from November 2007 A total of 4320 records 58% were stationary, unstable and not in the mast shadow Results shown are for wind speed U= 10-11ms -1 12
13 Compare to the coherence in IEC Unstable conditions 13
14 Compare to the coherence in IEC Unstable conditions 14
15 Coherence under stable wind conditions <= Ri < 0.49 Data from may 2008 A total of 4464 records 8% were stationary, stable and not in the mast shadow Results shown are for Wind speed U= 10-11ms -1 15
16 Compare to the coherence in IEC Stable conditions 16
17 Compare to the coherence in IEC Stable conditions 17
18 Msc project to investigate the impact of atmopsheric stability & coherence on the loads and response of a floating offshore wind turbine Please see Rieska s poster for more details 18
19 Conclusion The Mann turbulence model shows a good agreement with measured values at 40 m separation for the uu and ww cocoherence, but tends to show a lower value at 20 m separation for neutral conditions. The measured vertical uu cocoherence for unstable conditions are significantly higher than values given by both models in the IEC standards. Whereas the opposite is true for stable conditions. Results show the importance to using offshore wind data to determine the appropriate turbulence parameters for wind turbine simulations. Initial results form HAWC2 simulations confirm the sensitivity tower top yaw to varying atmospheric conditions and hence coherence. Planed measurement campaign OBLEX1 will use lidars to measure horizontal coherence as part of the NORCOWE research project. Further work: Investigate the wind coherence using data from at least 1 year to improve accuracy Fit the Manns turbulence model to the measurements for different atmospheric stability conditions Run simulations using HAWC2 using parameter values fitted to the FINO data for different atmospheric conditions and compare those results to parameters given at Høvsøre and in the IEC standards MSc project to be finalized end of June student Rieska Mawarni Putri 19
Validation of Measurements from a ZephIR Lidar
Validation of Measurements from a ZephIR Lidar Peter Argyle, Simon Watson CREST, Loughborough University, Loughborough, United Kingdom p.argyle@lboro.ac.uk INTRODUCTION Wind farm construction projects
More informationFINO1 Mast Correction
FINO1 Mast Correction A. Westerhellweg, T. Neunn; DEWI GmbH, Wilhelmshaven V. Riedel; DEWI North America Inc. A. Westerhellweg English Abstract Lateral speed-up effects, upwind flow retardation and downwind
More informationWind measurements that reduce electricity prices
Wind measurements that reduce electricity prices Extensive testing in three countries has proven that laser measurements of wind provide precise, reliable wind data. The research findings will make it
More informationResults and conclusions of a floating Lidar offshore test
Results and conclusions of a floating Lidar offshore test J. Gottschall, G. Wolken-Möhlmann, Th. Viergutz, B. Lange [Fraunhofer IWES Wind Lidar Buoy next to FINO1 met. mast] EERA DeepWind'2014 Conference,
More informationNORCOWE met-ocean measurement campaigns
NORCOWE met-ocean measurement campaigns Kumer V.-M., Reuder J., Furevik B.,, Båserud L., Svardal B., Sæter C., Flügge M., Bakhoday Paskyabi M., Eecen P. University of Bergen, Norway, CMR, Norway, Meteorological
More informationFuga. - Validating a wake model for offshore wind farms. Søren Ott, Morten Nielsen & Kurt Shaldemose Hansen
Fuga - Validating a wake model for offshore wind farms Søren Ott, Morten Nielsen & Kurt Shaldemose Hansen 28-06- Outline What is Fuga? Model validation: which assumptions are tested? Met data interpretation:
More informationOFFSHORE CREDENTIALS. Accepted for wind resource assessment onshore and offshore by leading Banks Engineers, globally
OFFSHORE CREDENTIALS Accepted for wind resource assessment onshore and offshore by leading Banks Engineers, globally ZEPHIR OFFSHORE CREDENTIALS Accepted for wind resource assessment onshore and offshore
More informationAvailable online at ScienceDirect. Energy Procedia 53 (2014 )
Available online at www.sciencedirect.com ScienceDirect Energy Procedia 53 (2014 ) 156 161 EERA DeepWind 2014, 11th Deep Sea Offshore Wind R&D Conference Results and conclusions of a floating-lidar offshore
More informationThe NORCOWE legacy - data and instrumentation
U N I V E R S I T Y O F B E R G E N Geophysical Institute The NORCOWE legacy - data and instrumentation J. Reuder 1, M. Flügge 1,2, M. Bakhoday Pakyabi 1,3, B. Svardal 2 1 Geophysical Institute, University
More informationIncreased Project Bankability : Thailand's First Ground-Based LiDAR Wind Measurement Campaign
Increased Project Bankability : Thailand's First Ground-Based LiDAR Wind Measurement Campaign Authors: Velmurugan. k, Durga Bhavani, Ram kumar. B, Karim Fahssis As wind turbines size continue to grow with
More informationFull Classification acc. to IEC for SoDAR AQ510 Wind Finder. Vincent Camier, Managing Director, Ammonit Measurement GmbH
Full Classification acc. to IEC 61400-12-1 for SoDAR AQ510 Wind Finder Vincent Camier, Managing Director, Ammonit Measurement GmbH Ammonit Company Profile German company, based in Berlin +25 years of know-how
More informationValidation of measurements from a ZephIR Lidar
Loughborough University Institutional Repository Validation of measurements from a ZephIR Lidar This item was submitted to Loughborough University's Institutional Repository by the/an author. Citation:
More informationAnalysis of the Turbulence Intensity at Skipheia Measurement Station
Analysis of the Turbulence Intensity at Skipheia Measurement Station Ingunn Sletvold Øistad Master of Energy and Environmental Engineering Submission date: June 2015 Supervisor: Lars Sætran, EPT Co-supervisor:
More informationDIRECTION DEPENDENCY OF OFFSHORE TURBULENCE INTENSITY IN THE GERMAN BIGHT
10 th Wind Energy Conference DEWEK 2010 DIRECTION DEPENDENCY OF OFFSHORE TURBULENCE INTENSITY IN THE GERMAN BIGHT Annette Westerhellweg, Beatriz Canadillas, Thomas Neumann DEWI GmbH, Wilhelmshaven, Germany,
More informationThe Offshore Boundary Layer Observatory (OBLO) Possibilities for the offshore wind industry
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,
More informationComputationally Efficient Determination of Long Term Extreme Out-of-Plane Loads for Offshore Turbines
Computationally Efficient Determination of Long Term Extreme Out-of-Plane Loads for Offshore Turbines Anand Natarajan Senior Scientist Wind Energy Department, Risø DTU Denmark Introduction IEC 61400-1
More informationAtmospheric Stability Affects Wind Turbine Performance and Wake Effect
Atmospheric Stability Affects Wind Turbine Performance and Wake Effect Hong Liu, John Liu*, Gus DiMaria and Jon Fournier CanWEA Annual Conference and Exhibition, October 23-25, 2018, Calgary, AB *York
More information3D Turbulence at the Offshore Wind Farm Egmond aan Zee J.W. Wagenaar P.J. Eecen
3D Turbulence at the Offshore Wind Farm Egmond aan Zee J.W. Wagenaar P.J. Eecen OWEZ_R_121_3Dturbulence_20101008 ECN-E--10-075 OCTOBER 2010 Abstract NoordzeeWind carries out an extensive measurement and
More informationStrategic Advice about Floating LiDAR Campaigns. Borssele offshore wind farm
Strategic Advice about Floating LiDAR Campaigns Borssele offshore wind farm Strategic Advice about Floating LiDAR Campaigns Borssele offshore wind farm Project number: ESMWT16419 Prepared: Dhruv Dhirendra
More informationOn- and Offshore Assessment of the ZephIR Wind-LiDAR
On- and Offshore Assessment of the ZephIR Wind-LiDAR Detlef Kindler Kaiser-Wilhelm-Koog GmbH Andy Oldroyd Oldbaum Services Ltd. IEA R&D Task 11, Wind Energy 51 st Topical Expert Meeting on Remote Sensing
More informationWind shear and its effect on wind turbine noise assessment Report by David McLaughlin MIOA, of SgurrEnergy
Wind shear and its effect on wind turbine noise assessment Report by David McLaughlin MIOA, of SgurrEnergy Motivation Wind shear is widely misunderstood in the context of noise assessments. Bowdler et
More informationMeasuring offshore winds from onshore one lidar or two?
Downloaded from orbit.dtu.dk on: Dec 21, 2017 Measuring offshore winds from onshore one lidar or two? Vasiljevic, Nikola; Courtney, Michael; Pena Diaz, Alfredo; Lea, Guillaume; Vignaroli, Andrea Publication
More informationEvaluation of wind loads by a passive yaw control at the extreme wind speed condition and its verification by measurements
Evaluation of wind loads by a passive yaw control at the extreme wind speed condition and its verification by measurements Dec/11/2017 Soichiro Kiyoki Takeshi Ishihara Mitsuru Saeki Ikuo Tobinaga (Hitachi,
More informationAssessing the quality of Synthetic Aperture Radar (SAR) wind retrieval in coastal zones using multiple Lidars
Assessing the quality of Synthetic Aperture Radar (SAR) wind retrieval in coastal zones using multiple Lidars Tobias Ahsbahs Merete Badger, Ioanna Karagali, Xiaoli Larsen What is the coastal zone? Coastal
More information7 th International Conference on Wind Turbine Noise Rotterdam 2 nd to 5 th May 2017
7 th International Conference on Wind Turbine Noise Rotterdam 2 nd to 5 th May 2017 Sound power level measurements 3.0 ir. L.M. Eilders, Peutz bv: l.eilders@peutz.nl ing. E.H.A. de Beer, Peutz bv: e.debeer@peutz.nl
More informationFlow modelling hills complex terrain and other issues
Flow modelling hills, complex terrain and other issues Modelling approaches sorted after complexity Rules of thumbs Codes and standards Linear model, 1 st order turbulence closure LINCOM/Wasp Reynolds-averaged
More informationWhy does T7 underperform? Individual turbine performance relative to preconstruction estimates.
Why does T7 underperform? Individual turbine performance relative to preconstruction estimates. P. Stuart, N. Atkinson, A. Clerc, A. Ely, M. Smith, J. Cronin, M. Zhu & T Young. EWEA Technology Workshop
More informationLiDAR Application to resource assessment and turbine control
ENERGY LiDAR Application to resource assessment and turbine control Dr. Avishek Kumar The New Zealand Wind Energy Conference 13 th April 2016 1 SAFER, SMARTER, GREENER Agenda What is LiDAR? Remote Sensing
More informationPredicting and simulating wake in stable conditions
Predicting and simulating wake in stable conditions Model chain evaluation and an example Mark Žagar, Gregory S. Oxley, Yavor V. Hristov Vestas Wind Systems A/S, Plant Siting and Forecasting 15 January
More informationExecutive Summary of Accuracy for WINDCUBE 200S
Executive Summary of Accuracy for WINDCUBE 200S The potential of offshore wind energy has gained significant interest due to consistent and strong winds, resulting in very high capacity factors compared
More informationReal Life Turbulence and Model Simplifications. Jørgen Højstrup Wind Solutions/Højstrup Wind Energy VindKraftNet 28 May 2015
Real Life Turbulence and Model Simplifications Jørgen Højstrup Wind Solutions/Højstrup Wind Energy VindKraftNet 28 May 2015 Contents What is turbulence? Description of turbulence Modelling spectra. Wake
More informationLaser remote sensing for wind energy
Downloaded from orbit.dtu.dk on: Sep 02, 2018 Mann, Jakob Published in: Proceedings Publication date: 2011 Document Version Publisher's PDF, also known as Version of record Link back to DTU Orbit Citation
More informationModelling atmospheric stability with CFD: The importance of tall profiles
ENERGY Modelling atmospheric stability with CFD: The importance of tall profiles VindKraftNet Seminar on Profiles Jean-François Corbett, Global Head of CFD Service 1 SAFER, SMARTER, GREENER DNV GL CFD
More informationOffshore Wind Turbine Wake Characterization using Scanning Doppler Lidar
Offshore Wind Turbine Wake Characterization using Scanning Doppler Lidar R. Krishnamurthy a, J. Reuder b, B. Svardal c, H.J.S. Fernando a, J. B. Jakobsen d a University of Notre-Dame, Notre-Dame, Indiana
More informationVINDKRAFTNET MEETING ON TURBULENCE
VINDKRAFTNET MEETING ON TURBULENCE On-going Work on Wake Turbulence in DONG Energy 28/05/2015 Cameron Brown Load Engineer Lucas Marion R&D graduate Who are we? Cameron Brown Load Engineer from Loads Aerodynamics
More informationLarge-eddy simulation study of effects of clearing in forest on wind turbines
Large-eddy simulation study of effects of clearing in forest on wind turbines J. Matsfelt 1 and L. Davidson 1 1 Chalmers University of Technology, Dep. of Mechanics and Maritime Sciences, Div. of Fluid
More information2. Fachtagung Energiemeteorologie 2011, Bremerhaven SITE ASSESSMENT. WIND TURBINE ASSESSMENT. GRID INTEGRATION. DUE DILIGENCE. KNOWLEDGE.
Turbulence intensity in the German Bight: Comparison of the turbulence conditions at FINO1 and FINO3 A. Westerhellweg, B. Canadillas, T. Neumann, DEWI GmbH SITE ASSESSMENT. WIND TURBINE ASSESSMENT. GRID
More informationMeasurement and simulation of the flow field around a triangular lattice meteorological mast
Measurement and simulation of the flow field around a triangular lattice meteorological mast Matthew Stickland 1, Thomas Scanlon 1, Sylvie Fabre 1, Andrew Oldroyd 2 and Detlef Kindler 3 1. Department of
More informationPower curves - use of spinner anemometry. Troels Friis Pedersen DTU Wind Energy Professor
Power curves - use of spinner anemometry Troels Friis Pedersen DTU Wind Energy Professor Spinner anemometry using the airflow over the spinner to measure wind speed, yaw misalignment and flow inclination
More informationAnalyses of the mechanisms of amplitude modulation of aero-acoustic wind turbine sound
Analyses of the mechanisms of amplitude modulation of aero-acoustic wind turbine sound Andreas Fischer Helge Aagaard Madsen Knud Abildgaard Kragh Franck Bertagnolio DTU Wind Energy Technical University
More informationHow good are remote sensors at measuring extreme winds?
How good are remote sensors at measuring extreme winds? A. Sathe a,b, M. Courtney b, J.Mann b, R. Wagner b a L& R, Section Wind Energy, TU Delft, Delft, The Netherlands, A.R.Sathe@tudelft.nl b Wind Energy
More informationVALIDATION OF WIND SPEED DISTURBANCES TO CUPS AT THE METEORLOCICAL MAST ON THE OFFSHORE PLATFORM FINO1 USING WIND-LIDAR MEASUREMENTS.
VALIDATION OF WIND SPEED DISTURBANCES TO CUPS AT THE METEORLOCICAL MAST ON THE OFFSHORE PLATFORM FINO1 USING WIND-LIDAR MEASUREMENTS Authors: Detlef Kindler K.-W.-Koog GmbH Andy Oldroyd Oldbaum Services
More informationFIVE YEARS OF OPERATION OF THE FIRST OFFSHORE WIND RESEARCH PLATFORM IN THE GERMAN BIGHT FINO1
FIVE YEARS OF OPERATION OF THE FIRST OFFSHORE WIND RESEARCH PLATFORM IN THE GERMAN BIGHT FINO1 Andreas Beeken, DEWI GmbH, Ebertstraße 96, D-26382 Wilhelmshaven Thomas Neumann, DEWI GmbH, Ebertstraße 96,
More informationMeasuring power performance with a Wind Iris 4- beam in accordance with EUDP procedure
Measuring power performance with a Wind Iris 4- beam in accordance with EUDP procedure This document evaluates the applicability of the EUDP procedure for wind turbine measuring power performance using
More informationWake effects at Horns Rev and their influence on energy production. Kraftværksvej 53 Frederiksborgvej 399. Ph.: Ph.
Wake effects at Horns Rev and their influence on energy production Martin Méchali (1)(*), Rebecca Barthelmie (2), Sten Frandsen (2), Leo Jensen (1), Pierre-Elouan Réthoré (2) (1) Elsam Engineering (EE)
More informationInvestigation on Deep-Array Wake Losses Under Stable Atmospheric Conditions
Investigation on Deep-Array Wake Losses Under Stable Atmospheric Conditions Yavor Hristov, Mark Zagar, Seonghyeon Hahn, Gregory Oxley Plant Siting and Forecasting Vestas Wind Systems A/S Introduction Introduction
More information10 th WindSim User Meeting June 2015, Tønsberg
10 th WindSim User Meeting 24-25 June 2015, Tønsberg Best Practice PRESENTED BY: Di Li 1 of 3 Content 1. Objective: Bankable AEP Site Suitability 2. Management: Balance on accuracy, timeline and resource
More informationLow level coastal jet
MetOcean analysis of a low-level coastal jet off the Norwegian coast. EERA DeepWind'2014 Deep Sea Offshore Wind R&D Conference, Trondheim, 22-24 January 2014 Harokopio University Konstantinos Christakos,
More informationInvestigation on Atmospheric Boundary Layers: Field Monitoring and Wind Tunnel Simulation
Investigation on Atmospheric Boundary Layers: Field Monitoring and Wind Tunnel Simulation Chii-Ming Cheng 1, 2, Ming-Shu Tsai 2, Yuan-Lung Lo 1, 2, Chun-Han Wang 2 1 Department of Civil Engineering, Tamkang
More informationWind farm production estimates
Downloaded from orbit.dtu.dk on: Mar 16, 2019 Wind farm production estimates Larsen, Torben J.; Larsen, Gunner Chr.; Aagaard Madsen, Helge; Hansen, Kurt Schaldemose Published in: Proceedings of EWEA 2012
More informationHollandse Kust (zuid) Wind resource assessment. 17 January 2017 Anthony Crockford
Hollandse Kust (zuid) Wind resource assessment 17 January 2017 Overview > Introduction > Wind measurements > Mesoscale model > Calculation of wind climate > Comparisons > Conclusions 2 ECOFYS WTTS 17/01/2017
More informationTESTING AND CALIBRATION OF VARIOUS LiDAR REMOTE SENSING DEVICES FOR A 2 YEAR OFFSHORE WIND MEASUREMENT CAMPAIGN
TESTING AND CALIBRATION OF VARIOUS LiDAR REMOTE SENSING DEVICES FOR A 2 YEAR OFFSHORE WIND MEASUREMENT CAMPAIGN D Kindler 1 WINDTEST Kaiser Wilhelm Koog detlef.kindler@wtk.windtest.com 1 Corresponding
More informationA Comparison of the UK Offshore Wind Resource from the Marine Data Exchange. P. Argyle, S. J. Watson CREST, Loughborough University, UK
A Comparison of the UK Offshore Wind Resource from the Marine Data Exchange P. Argyle, S. J. Watson CREST, Loughborough University, UK Introduction Offshore wind measurements are scarce and expensive,
More informationGlobal Flow Solutions Mark Zagar, Cheng Hu-Hu, Yavor Hristov, Søren Holm Mogensen, Line Gulstad Vestas Wind & Site Competence Centre, Technology R&D
Global Flow Solutions Mark Zagar, Cheng Hu-Hu, Yavor Hristov, Søren Holm Mogensen, Line Gulstad Vestas Wind & Site Competence Centre, Technology R&D vestas.com Outline The atmospheric modeling capabilities
More informationSupplement of Wind turbine power production and annual energy production depend on atmospheric stability and turbulence
Supplement of Wind Energ. Sci., 1, 221 236, 2016 http://www.wind-energ-sci.net/1/221/2016/ doi:10.5194/wes-1-221-2016-supplement Author(s) 2016. CC Attribution 3.0 License. Supplement of Wind turbine power
More informationDeep Sea Offshore Wind Power R&D Seminar Trondheim, Jan. 2011
Deep Sea Offshore Wind Power R&D Seminar Trondheim, 20-21 Jan. 2011 Atmospheric Profiling by Lidar for Wind Energy Research Torben Mikkelsen Wind Energy Division Risø National Laboratory for Sustainable
More informationWind loads investigations of HAWT with wind tunnel tests and site measurements
loads investigations of HAWT with wind tunnel tests and site measurements Shigeto HIRAI, Senior Researcher, Nagasaki R&D Center, Technical Headquarters, MITSUBISHI HEAVY INDSUTRIES, LTD, Fukahori, Nagasaki,
More information10.6 The Dynamics of Drainage Flows Developed on a Low Angle Slope in a Large Valley Sharon Zhong 1 and C. David Whiteman 2
10.6 The Dynamics of Drainage Flows Developed on a Low Angle Slope in a Large Valley Sharon Zhong 1 and C. David Whiteman 2 1Department of Geosciences, University of Houston, Houston, TX 2Pacific Northwest
More informationJ7.6 LIDAR MEASUREMENTS AS AN ALTERNATIVE TO TRADITIONAL ANEMOMETRY IN WIND ENERGY RESEARCH. Golden, CO, U.S.A.
J7.6 LIDAR MEASUREMENTS AS AN ALTERNATIVE TO TRADITIONAL ANEMOMETRY IN WIND ENERGY RESEARCH Pichugina Y. L. 1,2, R. M. Hardesty 2, R. M. Banta 2, W. A. Brewer 2, S. P. Sandberg 2, and 3 N. D. Kelley 3
More informationControl Strategies for operation of pitch regulated turbines above cut-out wind speeds
Control Strategies for operation of pitch regulated turbines above cut-out wind speeds Helen Markou 1 Denmark and Torben J. Larsen, Risø-DTU, P.O.box 49, DK-4000 Roskilde, Abstract The importance of continuing
More informationWind resource assessment over a complex terrain covered by forest using CFD simulations of neutral atmospheric boundary layer with OpenFOAM
Wind resource assessment over a complex terrain covered by forest using CFD simulations of neutral atmospheric boundary layer with OpenFOAM Nikolaos Stergiannis nstergiannis.com nikolaos.stergiannis@vub.ac.be
More informationREMOTE SENSING APPLICATION in WIND ENERGY
REMOTE SENSING APPLICATION in WIND ENERGY Siraj Ahmed Professor & Head Department of Mechanical Engineering Maulana Azad National Iinstitute of Technology Bhopal, India sirajahmed@manit.ac.in Contents
More informationAn analysis of offshore wind farm SCADA measurements to identify key parameters influencing the magnitude of wake effects
Journal of Physics: Conference Series PAPER OPEN ACCESS An analysis of offshore wind farm SCADA measurements to identify key parameters influencing the magnitude of wake effects To cite this article: N
More informationOn the use of rotor equivalent wind speed to improve CFD wind resource mapping. Yavor V. Hristov, PhD Plant Performance and Modeling Vestas TSS
On the use of rotor equivalent wind speed to improve CFD wind resource mapping Yavor V. Hristov, PhD Plant Performance and Modeling Vestas TSS Firestorm- Number 53 on Top500 list from June 2011 14664 processors
More informationEstimating atmospheric stability from observations and correcting wind shear models accordingly
Journal of Physics: Conference Series OPEN ACCESS Estimating atmospheric stability from observations and correcting wind shear models accordingly To cite this article: M C Holtslag et al 2014 J. Phys.:
More informationOutline. Wind Turbine Siting. Roughness. Wind Farm Design 4/7/2015
Wind Turbine Siting Andrew Kusiak 2139 Seamans Center Iowa City, Iowa 52242-1527 andrew-kusiak@uiowa.edu Tel: 319-335-5934 Fax: 319-335-5669 http://www.icaen.uiowa.edu/~ankusiak Terrain roughness Escarpments
More information3D Nacelle Mounted Lidar in Complex Terrain
ENERGY 3D Nacelle Mounted Lidar in Complex Terrain PCWG Hamburg, Germany Paul Lawson 25.03.2015 1 DNV GL 125.03.2015 SAFER, SMARTER, GREENER Agenda Introduction and Project Background Lidar Specifications
More informationMarine Kit 4 Marine Kit 4 Sail Smooth, Sail Safe
Marine Kit 4 Marine Kit 4 Sail Smooth, Sail Safe Includes Basic ship Terminologies and Investigation Check list Index 1. Ship Terminology 03 2. Motions of a Floating Body...09 3. Ship Stability.10 4. Free
More informationNoise from wind turbines under non-standard conditions
Noise from wind turbines under non-standard conditions Lars S. Søndergaard a) DELTA Acoustics Agro Food Park 13, 8200 Aarhus N, Denmark Noise prediction for wind turbines and wind farms are often based
More informationStatistical analysis of fatigue loads in a direct drive wind turbine
Statistical analysis of fatigue loads in a direct drive wind turbine Håan Johansson Dept. Applied Mechanics Chalmers University of Technology haan.johansson@chalmers.se Vitor Berbyu Dept. Applied Mechanics
More informationCan Lidars Measure Turbulence? Comparison Between ZephIR 300 and an IEC Compliant Anemometer Mast
Can Lidars Measure Turbulence? Comparison Between ZephIR 300 and an IEC Compliant Anemometer Mast W. Barker (1), M. Pitter (2), E. Burin des Roziers (3), M. Harris (4), R. Scullion (5) (1) Natural Power
More information2MW baseline wind turbine: model development and verification (WP1) The University of Tokyo & Hitachi, Ltd.
2MW baseline wind turbine: model development and verification (WP1) The University of Tokyo & Hitachi, Ltd. Downwind turbine technology, IEA Wind Task 40 First Progress Meeting, Tokyo, Japan 11 Dec, 2017
More informationCOMPARISON OF ZEPHIR MEASUREMENTS AGAINST CUP ANEMOMETRY AND POWER CURVE ASSESSMENT
COMPARISON OF ZEPHIR MEASUREMENTS AGAINST CUP ANEMOMETRY AND POWER CURVE ASSESSMENT Author: Marion Cayla Issued: 8 February 2010 Natural Power, 10 place du Temple Neuf, 67000, Strasbourg, France, SIREN
More informationAtmospheric Impacts on Power Curves of Multi- Megawatt Offshore Wind Turbines
Journal of Physics: Conference Series OPEN ACCESS Atmospheric Impacts on Power Curves of Multi- Megawatt Offshore Wind Turbines To cite this article: M Dörenkämper et al 2014 J. Phys.: Conf. Ser. 555 012029
More informationNORCOWE Reference Wind Farm
NORCOWE Reference Wind Farm Kristin Guldbrandsen Frøysa, director NORCOWE kristin@cmr.no Main contributions to presentation: Angus Graham, Alla Sapronova, Thomas Bak, John Dalsgaard Sørensen, Mihai Florian
More informationYelena L. Pichugina 1,2, R. M. Banta 2, N. D. Kelley 3, W. A. Brewer 2, S. P. Sandberg 2, J. L. Machol 1, 2, and B. J. Jonkman 3
4 th Symposium on Lidar Atmos. Applic, AMS, Phoenix, Arizona, January 2009 5.5 LIDAR MEASUREMENTS OF EXTREME INFLOW EVENTS FOR WIND ENERGY OPERATIONS Yelena L. Pichugina 1,2, R. M. Banta 2, N. D. Kelley
More informationPERFORMANCE STABILITY OF ZEPHIR IN HIGH MOTION ENVIRONMENTS: FLOATING AND TURBINE MOUNTED
PERFORMANCE STABILITY OF ZEPHIR IN HIGH MOTION ENVIRONMENTS: FLOATING AND TURBINE MOUNTED M. Pitter, E. Burin des Roziers, J. Medley, M. Mangat, C. Slinger and M. Harris October 2014 TABLE OF CONTENTS
More informationWind Project Siting & Resource Assessment
Wind Project Siting & Resource Assessment David DeLuca, Project Manager AWS Truewind, LLC 463 New Karner Road Albany, NY 12205 ddeluca@awstruewind.com www.awstruewind.com AWS Truewind - Overview Industry
More informationExtreme fluctuations of wind speed for a coastal/offshore joint. statistics. extreme. and impact on wind turbine loads
Extreme fluctuations of wind speed for a coastal/offshore climatefluctuations: joint statistics, extreme turbulence, and impact on wind turbine loads Ásta Hannesdóttir, Mark Kelly, and Nikolay Dimitrov
More informationWindcube FCR measurements
Windcube FCR measurements Principles, performance and recommendations for use of the Flow Complexity Recognition (FCR) algorithm for the Windcube ground-based Lidar Summary: As with any remote sensor,
More informationLifting satellite winds from 10 m to hub-height
Lifting satellite winds from 10 m to hub-height Hasager, C.B., Badger, M., Peña, A., Hahmann, A., Volker, P. 23 May 2016 VindkraftNet meeting, DONG Energy, Skærbæk Motivation We have: Satellite wind maps
More informationHavsnäs Pilot Project
Havsnäs Pilot Project ALAN DERRICK SENIOR TECHNICAL MANAGER Project financed by: Swedish Energy Agency Pilot Grant Winterwind, Östersund February 2013 1 Havsnäs Site Location 2 The Havsnäs Project 110
More informationThe EllipSys2D/3D code and its application within wind turbine aerodynamics
The EllipSys2D/3D code and its application within wind turbine aerodynamics Niels N. Sørensen Wind Energy Department, Risø DTU National Laboratory for Sustainable Energy and Dep. Civil Engineering, Aalborg
More informationImportance of thermal effects and sea surface roughness for offshore wind resource assessment
Downloaded from orbit.dtu.dk on: Sep 09, 2018 Importance of thermal effects and sea surface roughness for offshore wind resource assessment Lange, B.; Larsen, Søren Ejling; Højstrup, Jørgen; Barthelmie,
More informationRotor Average wind speed for power curve performance. Ioannis Antoniou (LAC), Jochen Cleve (LAC), Apostolos Piperas (LAC)
Rotor Average wind speed for power curve performance Ioannis Antoniou (LAC), Jochen Cleve (LAC), Apostolos Piperas (LAC) March 2, 23 Contents Rotor Average wind speed EU flat terrain wind profiles vs.
More informationAnalysis and Verification of Wind Data from Ground-based LiDAR
Analysis and Verification of Wind Data from Ground-based LiDAR Dongbum Kang*, Jiyeong Hyeon*, Kyoungboo Yang*, Jongchul Huh**, Kyungnam Ko* * Faculty of Wind Energy Engineering, Graduate School, Jeju National
More informationStefan Emeis
The Physics of Wind Park Optimization Stefan Emeis stefan.emeis@kit.edu INSTITUTE OF METEOROLOGY AND CLIMATE RESEARCH, Photo: Vattenfall/C. Steiness KIT University of the State of Baden-Wuerttemberg and
More information10 years of meteorological measurements at FINO1
10 years of meteorological measurements at FINO1 Thomas Neumann, Friederike Kinder, Beatriz Canadillas SITE ASSESSMENT. WIND TURBINE ASSESSMENT. GRID INTEGRATION. DUE DILIGENCE. KNOWLEDGE. CONSULTANCY
More informationMeteorological Measurements OWEZ
Meteorological Measurements OWEZ Half year report - 01-07-2008-31-12-2008 H. Korterink P.J. Eecen J.W. Wagenaar ECN-E--09-018 OWEZ_R_121_20080701-20081231_WIND_RESOURCE_2008_2 Abstract NoordzeeWind carries
More informationFlow analysis with nacellemounted
Flow analysis with nacellemounted LiDAR E.T.G. Bot September 2016 ECN-E--16-041 Acknowledgement The work reported here is carried out in the TKI LAWINE project which is partially funded by the Dutch government
More informationComputational Fluid Dynamics
Computational Fluid Dynamics A better understanding of wind conditions across the whole turbine rotor INTRODUCTION If you are involved in onshore wind you have probably come across the term CFD before
More informationMeteorological Measurements OWEZ
Meteorological Measurements OWEZ Half year report 01-01-2008-30-06-2008 H. Korterink P.J. Eecen ECN-E--08-062 OWEZ_R_121_20080101-20080630_wind_resource_2008_1 Abstract NoordzeeWind carries out an extensive
More informationSpectral characteristics of the wind components in the surface Atmospheric Boundary Layer
Spectral characteristics of the wind components in the surface Atmospheric Boundary Layer COSTAS HELMIS AND DIMOSTHENIS ASIMAKOPOULOS Department of Environmental Physics and Meteorology Faculty of Physics,
More informationAccounting for the speed shear in wind turbine power performance measurement. Risø-PhD-Report
Accounting for the speed shear in wind turbine power performance measurement Risø-PhD-Report Rozenn Wagner Risø-PhD-58(EN) - Short version April 2010 Author: Rozenn Wagner Title: Accounting for the speed
More informationSpectral analysis of wind turbulence measured by a Doppler Lidar for velocity fine structure and coherence studies
Downloaded from orbit.dtu.dk on: Dec 23, 218 Spectral analysis of wind turbulence measured by a Doppler Lidar for velocity fine structure and coherence studies Sjöholm, Mikael; Mikkelsen, Torben Krogh;
More informationCFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS
CFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS T. Gélain, C. Prévost Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Saclay, France Abstract In order to better understand the risks due
More information3D-simulation of the turbulent wake behind a wind turbine
Journal of Physics: Conference Series 3D-simulation of the turbulent wake behind a wind turbine To cite this article: Steffen Wußow et al 2007 J. Phys.: Conf. Ser. 75 012033 View the article online for
More informationANALYSIS OF TURBULENCE STRUCTURE IN THE URBAN BOUNDARY LAYER. Hitoshi Kono and Kae Koyabu University of Hyogo, Japan
Proceedings of the th Int. Conf. on Harmonisation within ANALYSIS OF TUBULENCE STUCTUE IN THE UBAN BOUNDAY LAYE Hitoshi Kono and Kae Koyabu University of Hyogo, Japan INTODUCTION The surface layer is defined
More informationScales of Atmospheric Motion Scale Length Scale (m) Time Scale (sec) Systems/Importance Molecular (neglected)
Supplement Wind, Fetch and Waves Scales of Atmospheric Motion Scale Length Scale (m) Time Scale (sec) Systems/Importance Molecular 10-7 - 10-2 10-1 (neglected) Coriolis not important Turbulent 10-2 10
More informationSteady State Comparisons HAWC2 v12.5 vs HAWCStab2 v2.14: Integrated and distributed aerodynamic performance
Downloaded from orbit.dtu.dk on: Jan 29, 219 Steady State Comparisons v12.5 vs v2.14: Integrated and distributed aerodynamic performance Verelst, David Robert; Hansen, Morten Hartvig; Pirrung, Georg Publication
More information