Investigation on Deep-Array Wake Losses Under Stable Atmospheric Conditions
|
|
- Claud Simpson
- 5 years ago
- Views:
Transcription
1 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
2 Introduction
3 Introduction Atmpospheric stability How wind flow changes? Surface warms and cools through diurnal and seasonal cycles Air near cold surface becomes cold, heavy Turbulence shuts down, shear increases, atmosphere is stable Features like low-level jet, katabatic flow, appear Situation is not stationary, wind and turbulence profiles undergo significant changes in time Wind speed profile in neutral (classic) and an example of stable conditions
4 Introduction Atmospheric stability Downward momentum transport (replacement of extracted wind energy) blockage Nacelle wind speed data
5 Unstable Stable Introduction Atmospheric stability Correlation between Stability and Wake losses from Production data
6 Lower Order Wake Models Fuga 2 and DWM
7 FUGA 2 Linearized CFD Wake model FUGA2 (March 2014 version) can predict effects of atmospheric stability from Moderately stable over Neutral to Unstable on wake deficit calculations. assumes a horizontally homogeneous ABL suited for flat terrain with a constant roughness length Wake losses in %- Neutral Wake losses in % - Moderately Stable Model Wake losses Fuga2- Neutral 17% Fuga2- Stable 23% SCADA 27%
8 Dynamic Wake Meandering (DWM) Park-level implementation of standalone DWM Time-averaged DWM wake flow field for different U h, TI, turbine types, stability, etc. (lookup table) Validation: Horns Rev 270 deg Neutral LES+ALM SCADA Results for the site in consideration are in preparation!
9 Multi-Scale High-Fidelity Simulations
10 High-Fidelity Modeling VestasFOAM Large-Eddy Simulation Actuator Line Model Coupling Based on SOWFA (NREL) Modifications: parallel architecture of ALM for linear scalability, run-time selectable BCs and turbulence models, wall functions based on local Monin-Obukhov similarity theory for applicability to heterogeneous terrain. Proper turbulence statistics according to class of thermal stratification and surface roughness Geostrophically driven and terrain temperature set from Mesoscale (WRF) simulation
11 High-Fidelity Modeling VestasFOAM Large-Eddy Simulation Actuator Line Model Coupling Models the blade as a single line of distributed forces that can vary in both space and time (unlike an actuator disk)
12 Surface Temperature (K) Mesoscale Simulations-WRF A typical day/night at the site WRF simulated surface temperature during a typical diurnal cycle Used as input forcing to the CFD microscale model Surface heating during the day produces a positive heat flux generating convective conditions. Characterized by low shear and high turbulence. Reverse is true during the nighttime, with surface cooling generating a negative heat flux causing a temperature inversion, high shear and low turbulence Time (hr)
13 Mesoscale Simulations Validation with Mast data Full physics: radiation, surface energy budget, humidity, clouds Real world observed data driven Surface forcing (+ possibly initial and lateral boundary conditions) for CFD Verification baseline for CFD Mast Data Model Data Observed (left) and WRF simulated (right) average vertical temperature gradient for all wind directions. Note frequent stable conditions for N-NE directions.
14 Precursor Simulations Microscale CFD Model Neutral (reference case) Precursor simulation with cyclic boundary conditions used to spin-up turbulence in the computational domain. Turbulence statistics accurate for given surface roughness and thermal stratification desired. Show below is instantaneous wind speed contours (left) and mean wind speed contours (right) for neutral flow conditions. Note mean wind speed contours reduce to the log-law profile as theory predicts.
15 Precursor Simulations Microscale CFD Model Neutral (reference case) Neutral - Instantaneous wind speed at hub height Neutral - Mean wind speed at hub height (10min averaging)
16 Precursor Simulations Diurnal Diurnal cycle begins from neutral conditions at T=15hr Unstable convective conditions progress to stable inversion at approx. T=26hr Unstable region characterized by high free stream turbulence and low shear Stable region characterized by low free stream turbulence and high shear Low-level jet can be seen to develop between m during stable hrs.
17 LES+ ALM Neutral Neutral - Instantaneous wind speed at hub height Neutral - Mean wind speed at hub height (10min averaging)
18 LES+ ALM Stable Stable - Instantaneous wind speed at hub height Stable - Mean wind speed at hub height (10min averaging)
19 High-Fidelity simulation results Neutral vs. Stable Neutral Stable
20 High-Fidelity simulation results Neutral vs. Stable Array 2 Array 1 Array 3 Neutral Stable
21 High-Fidelity simulation results Neutral vs. Stable Production Comparison Normalized Power by WTG1 Neutral = 17.3 corresponds to 33.5 % losses due to wake from N Stable = 14.9 corresponds to 42.3 % losses due to wake from N Array 1 Array 2 Array stable neutral stable neutral stable neutral
22 Conclusions and Future work HFM-Production losses across the park increase in stable flow conditions but it is more qualitative than quantitative result HFM-Massive effect of stability on wake losses on second row of turbines Lower order models (NO Jensen, Fuga2, DWM) are still much more viable for operational work! HFM-Aeroelastic Coupling and further refined wakes needs to be included HFM- Improved turbulence modeling (SGS)
23 Thank you for your attention Copyright Notice The documents are created by Vestas Wind Systems A/S and contain copyrighted material, trademarks, and other proprietary information. All rights reserved. No part of the documents may be reproduced or copied in any form or by any means - such as graphic, electronic, or mechanical, including photocopying, taping, or information storage and retrieval systems without the prior written permission of Vestas Wind Systems A/S. The use of these documents by you, or anyone else authorized by you, is prohibited unless specifically permitted by Vestas Wind Systems A/S. You may not alter or remove any trademark, copyright or other notice from the documents. The documents are provided as is and Vestas Wind Systems A/S shall not have any responsibility or liability whatsoever for the results of use of the documents by you.
Predicting 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 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 informationAutomated Steady and Transient CFD Analysis of Flow Over Complex Terrain for Risk Avoidance in Wind Turbine Micro-Siting
Automated Steady and Transient CFD Analysis of Flow Over Complex Terrain for Risk Avoidance in Wind Turbine Micro-Siting Global Flow Solutions, Vestas Wind Systems A/S Gregory S. Oxley, Yavor V. Hristov,
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 informationConditions for Offshore Wind Energy Use
Carl von Ossietzky Universität Oldenburg Institute of Physics Energy Meteorology Group Detlev Heinemann Conditions for Offshore Wind Energy Use Detlev Heinemann ForWind Carl von Ossietzky Universität Oldenburg
More informationThe Influence of Ocean Surface Waves on Offshore Wind Turbine Aerodynamics. Ali Al Sam
The Influence of Ocean Surface Waves on Offshore Wind Turbine Aerodynamics Ali Al Sam What I m going to wear today? Do I need to leave early to get to work? Taking buss or riding bike? Where will we drink
More informationPredicting climate conditions for turbine performance
Predicting climate conditions for turbine performance Mark Žagar, Vinay Belathur Krishna, Alvaro Matesanz Gil Vestas Data Engineering & Analytics / Advanced Plant Modelling Resource assessment, power curve,
More informationWake modelling for offshore wind turbine parks. Jens N. Sørensen Department of Wind Energy Technical University of Denmark
Wake modelling for offshore wind turbine parks Jens N. Sørensen Department of Wind Energy Technical University of Denmark Wake and Wind Farm Aerodynamics Basic questions and issues: How important is the
More informationWESEP 594 Research Seminar
WESEP 594 Research Seminar Aaron J Rosenberg Department of Aerospace Engineering Iowa State University Major: WESEP Co-major: Aerospace Engineering Motivation Increase Wind Energy Capture Betz limit: 59.3%
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 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 informationLES* IS MORE! * L ARGE E DDY S IMULATIONS BY VORTEX. WindEnergy Hamburg 2016
LES* IS MORE! * L ARGE E DDY S IMULATIONS BY VORTEX WindEnergy Hamburg 2016 OUTLINE MOTIVATION Pep Moreno. CEO, BASIS Alex Montornés. Modelling Specialist, VALIDATION Mark Žagar. Modelling Specialist,
More informationEnergy from wind and water extracted by Horizontal Axis Turbine
Energy from wind and water extracted by Horizontal Axis Turbine Wind turbines in complex terrain (NREL) Instream MHK turbines in complex bathymetry (VP East channel NewYork) Common features? 1) horizontal
More informationWind Turbine Noise Emission Customised Solutions for French Legislation
Wind Turbine Noise Emission Customised Solutions for French Legislation Énergie éolienne et innovation : quelles solutions face aux exigences techniques, réglementaires et environnementales? MEDDTL le
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 informationEERA DTOC wake results offshore
EERA DTOC wake results offshore Charlotte Hasager, Kurt Schaldemose Hansen, Pierre-Elouan Réthoré, Søren Ott, Jake Badger, Gerard Schepers, Ole Rathmann, Elena Cantero, Giorgos Sieros, Takis Chaviaropoulos,
More informationLecture 7. More on BL wind profiles and turbulent eddy structures. In this lecture
Lecture 7. More on BL wind profiles and turbulent eddy structures In this lecture Stability and baroclinicity effects on PBL wind and temperature profiles Large-eddy structures and entrainment in shear-driven
More informationOn the Interpretation of Scatterometer Winds near Sea Surface Temperature Fronts
On the Interpretation of Scatterometer Winds near Sea Surface Temperature Fronts Jim Edson University of Connecticut Amanda Plagge & Doug Vandemark University of New Hampshire IOVWST Meeting Utrecht, NL
More informationVestas Cold Climate Solutions and next stepsclimate Offerings
06-02-2018 Vestas Cold Climate Solutions and next stepsclimate Offerings Brian Daugbjerg Nielsen, Product Management Winterwind 2019 VESTAS COLD CLIMATE OFFERINGS FEATURING MODULAR ANTI-ICING ON ENVENTUS
More informationDecision Making as the Wind Blows
Decision Making as the Wind Blows - A Perspective on Wind Energy Control May 16, 2012, Martin Ansbjerg Kjær, LCCC 2nd Industrial Workshop, Lund Martin Ansbjerg Kjær MAANS@vestas.com 2003 MSc.EE. From Aalborg
More informationChapter 2. Turbulence and the Planetary Boundary Layer
Chapter 2. Turbulence and the Planetary Boundary Layer In the chapter we will first have a qualitative overview of the PBL then learn the concept of Reynolds averaging and derive the Reynolds averaged
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 informationForest Winds in Complex Terrain
Forest Winds in Complex Terrain Ilda Albuquerque 1 Contents Project Description Motivation Forest Complex Terrain Forested Complex Terrain 2 Project Description WAUDIT (Wind Resource Assessment Audit and
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 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 informationExploring wave-turbulence interaction through LES modeling
Exploring wave-turbulence interaction through LES modeling Mireia Udina 1 Jielun Sun 2 M. Rosa Soler 1 Branko Kosović 2 1. Dept. Astronomia i Meteorologia Universitat de Barcelona, Barcelona, Catalunya
More informationAnchor operations for Jack-up barge in offshore wind farms during service Customers perspective
Anchor operations for Jack-up barge in offshore wind farms during service Customers perspective There are several ways of moving jack up barges into a location close to a offshore wind turbine. There are
More informationWind Farm Blockage: Searching for Suitable Validation Data
ENERGY Wind Farm Blockage: Searching for Suitable Validation Data James Bleeg, Mark Purcell, Renzo Ruisi, and Elizabeth Traiger 09 April 2018 1 DNV GL 2014 09 April 2018 SAFER, SMARTER, GREENER Wind turbine
More informationWind Plant Simulation and Validation Jonathan Naughton Department of Mechanical Engineering University of Wyoming
Wind Plant Simulation and Validation Jonathan Naughton Department of Mechanical Engineering University of Wyoming 1 Overview Wind s Success Wind s Challenges Wind Plant Simulation and Validation Summary
More informationReview of Equivalent Neutral Winds and Stress
Review of Equivalent Neutral Winds and Stress Mark A. Bourassa Center for Ocean-Atmospheric Prediction Studies, Geophysical Fluid Dynamics Institute & Department of Earth, Ocean and Atmospheric Science
More informationThe Wind Resource: Prospecting for Good Sites
The Wind Resource: Prospecting for Good Sites Bruce Bailey, President AWS Truewind, LLC 255 Fuller Road Albany, NY 12203 bbailey@awstruewind.com Talk Topics Causes of Wind Resource Impacts on Project Viability
More informationValidation 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 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 informationWind Flow Modeling: Are computationally intensive models more accurate?
June 23 rd, 2015 Wind Flow Modeling: Are computationally intensive models more accurate? Philippe Beaucage, PhD Lead Research Scientist Michael C. Brower, PhD President & Chief Technical Officer Jose Vidal,
More informationSuper-parameterization of boundary layer roll vortices in tropical cyclone models
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Super-parameterization of boundary layer roll vortices in tropical cyclone models PI Isaac Ginis Graduate School of Oceanography
More informationAre Advanced Wind Flow Models More Accurate? A Test of Four Models
Are Advanced Wind Flow Models More Accurate? A Test of Four Models Philippe Beaucage, PhD Senior Research Scientist Michael C. Brower, PhD Chief Technical Officer Brazil Wind Power Conference 2012 Albany
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 informationAtmospheric Stability Impacts on Wind Turbine Performance
Atmospheric Stability Impacts on Wind Turbine Performance Julie K. Lundquist, Ph.D. Professor, Dept. of Atmospheric and Oceanic Sciences University of Colorado at Boulder Fellow, Renewable and Sustainable
More informationSurface Fluxes and Wind-Wave Interactions in Weak Wind Conditions
Surface Fluxes and Wind-Wave Interactions in Weak Wind Conditions Jielun Sun Microscale and Mesoscale Meteorology National Center for Atmospheric Research phone: (303) 497-8994 fax: (303) 497-8171 email:
More informationStudy on wind turbine arrangement for offshore wind farms
Downloaded from orbit.dtu.dk on: Jul 01, 2018 Study on wind turbine arrangement for offshore wind farms Shen, Wen Zhong; Mikkelsen, Robert Flemming Published in: ICOWEOE-2011 Publication date: 2011 Document
More informationMeteorology & Air Pollution. Dr. Wesam Al Madhoun
Meteorology & Air Pollution Dr. Wesam Al Madhoun Dispersion = Advection (Transport) + Dilution (Diffusion) Source Transport Receptor Re-entrainment Fick s law of diffusion J= - D * D C/Dx Where, J= Mass
More informationGravity waves in stable atmospheric boundary layers
Gravity waves in stable atmospheric boundary layers Carmen J. Nappo CJN Research Meteorology Knoxville, Tennessee 37919, USA Abstract Gravity waves permeate the stable atmospheric planetary boundary layer,
More informationWind: Small Scale and Local Systems Chapter 9 Part 1
Wind: Small Scale and Local Systems Chapter 9 Part 1 Atmospheric scales of motion Scales of atmospheric circulations range from meters or less to thousands of kilometers- millions of meters Time scales
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 information6.28 PREDICTION OF FOG EPISODES AT THE AIRPORT OF MADRID- BARAJAS USING DIFFERENT MODELING APPROACHES
6.28 PREDICTION OF FOG EPISODES AT THE AIRPORT OF MADRID- BARAJAS USING DIFFERENT MODELING APPROACHES Cecilia Soriano 1, Darío Cano 2, Enric Terradellas 3 and Bill Physick 4 1 Universitat Politècnica de
More informationThe Use of Bulk and Profile Methods for Determining Surface Heat Fluxes in the Presence of Glacier Winds
3 The Use of Bulk and Profile Methods for Determining Surface Heat Fluxes in the Presence of Glacier Winds A -D second-order closure model and in situ observations on a melting glacier surface are used
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 informationUpgrading Vestas V47-660kW
Guaranteed performance gains and efficiency improvements Upgrading Vestas V47-660kW Newly developed controller system enables increased Annual Energy Production up to 6.1% and safe turbine lifetime extension
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 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 informationDynamics and variability of surface wind speed and divergence over mid-latitude ocean fronts
Dynamics and variability of surface wind speed and divergence over mid-latitude ocean fronts Larry O Neill 1, Tracy Haack 2, and Simon de Szoeke 1 1 Oregon State University, Corvallis, OR 2 Naval Research
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 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 informationEvaluation of four numerical wind flow models
EWEA Resource Assessment Workshop 2013 Evaluation of four numerical wind flow models Michael C. Brower, PhD Chief Technical Officer Jose Vidal, MSc Consulting Services Europe & Latin America Manager Philippe
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 informationObserved Roughness Lengths for Momentum and Temperature on a Melting Glacier Surface
5 Observed Roughness Lengths for Momentum and Temperature on a Melting Glacier Surface The roughness lengths for momentum and temperature are calculated on a melting glacier surface. Data from a five level
More informationEERA DTOC wake results offshore
Downloaded from orbit.dtu.dk on: May 04, 2018 EERA DTOC wake results offshore Hasager, Charlotte Bay; Hansen, Kurt Schaldemose; Réthoré, Pierre-Elouan; Volker, Patrick; Palomares, Ana; Prospathopoulos,
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 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 informationModeling large offshore wind farms under different atmospheric stability regimes with the Park wake model
Downloaded from orbit.dtu.dk on: Aug 22, 28 Modeling large offshore wind farms under different atmospheric stability regimes with the Park wake model Pena Diaz, Alfredo; Réthoré, Pierre-Elouan; Rathmann,
More informationAgenda. Vestas Wind Systems. Opportunities and challenges in the wind renewable energy sector EU Perspective Vestas Perspective
Agenda Vestas Wind Systems Opportunities and challenges in the wind renewable EU Perspective Vestas Perspective 2 BETS, Opportunities and challenges in the wind renewable, May 11 2010 1 Our Vision Wind
More informationChallenges in simulating coastal effects on an offshore wind farm
Journal of Physics: Conference Series PAPER OPEN ACCESS Challenges in simulating coastal effects on an offshore wind farm To cite this article: M. P. van der Laan et al 2017 J. Phys.: Conf. Ser. 854 012046
More informationSurface Wind Speed Distributions: Implications for Climate and Wind Power
Surface Wind Speed Distributions: Implications for Climate and Wind Power Scott B. Capps and Charles S. Zender Department of Earth System Science University of California, Irvine Thanks: W. Liu (JPL),
More informationComparison of flow models
Comparison of flow models Rémi Gandoin (remga@dongenergy.dk) March 21st, 2011 Agenda 1. Presentation of DONG Energy 2. Today's presentation 1. Introduction 2. Purpose 3. Methods 4. Results 3. Discussion
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 informationWind and Drivetrain Applications using SIMULIA XFlow LBM
3DS.COM Dassault Systèmes 4/24/2018 ref.: 3DS_Document_2017 Wind and Drivetrain Applications using SIMULIA XFlow LBM 4th Wind and Drivetrain Conference Hamburg, April 19 th 2018 Zaki Abiza XFlow Business
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 informationAvailable online at ScienceDirect. Procedia Engineering 126 (2015 )
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 126 (2015 ) 542 548 7th International Conference on Fluid Mechanics, ICFM7 Terrain effects on characteristics of surface wind
More informationDUE TO EXTERNAL FORCES
17B.6 DNS ON GROWTH OF A VERTICAL VORTEX IN CONVECTION DUE TO EXTERNAL FORCES Ryota Iijima* and Tetsuro Tamura Tokyo Institute of Technology, Yokohama, Japan 1. INTRODUCTION Various types of vertical vortices,
More informationSurrounding buildings and wind pressure distribution on a high rise building
Surrounding buildings and wind pressure distribution on a high rise building Conference or Workshop Item Accepted Version Luo, Z. (2008) Surrounding buildings and wind pressure distribution on a high rise
More informationStudy on Fire Plume in Large Spaces Using Ground Heating
Available online at www.sciencedirect.com Procedia Engineering 11 (2011) 226 232 The 5 th Conference on Performance-based Fire and Fire Protection Engineering Study on Fire Plume in Large Spaces Using
More informationGeophysical Fluid Dynamics of the Earth. Jeffrey B. Weiss University of Colorado, Boulder
Geophysical Fluid Dynamics of the Earth Jeffrey B. Weiss University of Colorado, Boulder The Earth is a spinning sphere Coriolis force depends on latitude solar flux depends on latitude Michael Ritter,
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 informationSimulation of a 7.7 MW onshore wind farm with the Actuator Line Model
Journal of Physics: Conference Series PAPER OPEN ACCESS Simulation of a 7.7 MW onshore wind farm with the Actuator Line Model To cite this article: A Guggeri et al 2017 J. Phys.: Conf. Ser. 854 012018
More informationAir Pollution Dispersion
Air Pollution Dispersion Dispersion Processes Convective Dispersion Air Parcel Dynamics Adiabatic Process Lapse Rate Equilibrium and Stability Atmospheric Stability Stability and Dispersion Temperature
More informationWind Flow Validation Summary
IBHS Research Center Validation of Wind Capabilities The Insurance Institute for Business & Home Safety (IBHS) Research Center full-scale test facility provides opportunities to simulate natural wind conditions
More informationMesoscale Influences of Wind Farms throughout a Diurnal Cycle
JULY 2013 F I T C H E T A L. 2173 Mesoscale Influences of Wind Farms throughout a Diurnal Cycle ANNA C. FITCH Geophysical Institute, University of Bergen, and Uni Research, Bergen, Norway, and Mesoscale
More informationINCORPORATING SEASONAL WIND RESOURCE AND ELECTRICITY PRICE DATA INTO WIND FARM MICROSITING
University of Massachusetts Amherst ScholarWorks@UMass Amherst Masters Theses May 2014 - current Dissertations and Theses 2017 INCORPORATING SEASONAL WIND RESOURCE AND ELECTRICITY PRICE DATA INTO WIND
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 informationSIMULATING wind turbine operation under various operating
Proceedings of the World Congress on Engineering 23 Vol III, WCE 23, July 3 -, 23, London, U.K. Large Eddy Simulation of Wind Events Propagating through an Array of Wind Turbines Rupert Storey, Stuart
More informationRESOURCE DECREASE BY LARGE SCALE WIND FARMING
ECN-RX--4-14 RESOURCE DECREASE BY LARGE SCALE WIND FARMING G.P. Corten A.J. Brand This paper has been presented at the European Wind Energy Conference, London, -5 November, 4 NOVEMBER 4 Resource Decrease
More information2.4. Applications of Boundary Layer Meteorology
2.4. Applications of Boundary Layer Meteorology 2.4.1. Temporal Evolution & Prediction of the PBL Earlier, we saw the following figure showing the diurnal evolution of PBL. With a typical diurnal cycle,
More informationMET 200 Lecture 11 Local Winds. Last Lecture: Forces. Review of Forces. Balance of Forces
MET 200 Lecture 11 Local Winds Last Lecture: Forces Scales of Motion Eddies Sea Breeze Mountain-Valley Circulations Chinook - Snow Eater Drainage Wind - Katabatic Wind 1 2 Review of Forces 1. Pressure
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 informationTorrild - WindSIM Case study
Torrild - WindSIM Case study Note: This study differs from the other case studies in format, while here another model; WindSIM is tested as alternative to the WAsP model. Therefore this case should be
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 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 informationAtmospheric stability and complex terrain: comparing measurements and CFD
Journal of Physics: Conference Series OPEN ACCESS Atmospheric stability and complex terrain: comparing measurements and CFD To cite this article: T Koblitz et al 214 J. Phys.: Conf. Ser. 555 126 View the
More information1. Large-scale temperature inversions.
Lecture 18. Local and regional pollution issues: plumes of pollution. Objectives: 1. Large-scale temperature inversions. 2. Plumes of pollution. Readings: Turco: p.128-135; Brimblecombe: p.130-138 1. Large-scale
More informationEXTREME WIND GUSTS IN LARGE-EDDY SIMULATIONS OF TROPICAL CYCLONES
The National Center for Atmospheric Research (NCAR) is sponsored by the National Science Foundation (NSF) EXTREME WIND GUSTS IN LARGE-EDDY SIMULATIONS OF TROPICAL CYCLONES George Bryan National Center
More informationLOCAL WINDS. Prof. Stephan De Wekker Department of Env. Sciences Guest lecture EVSC 1300
LOCAL WINDS Prof. Stephan De Wekker (dewekker@virginia.edu) Department of Env. Sciences Guest lecture EVSC 1300 SEA BREEZE 980 mb 990 mb 1000 mb LAND BREEZE The convergence of two lake breezes and
More informationLocal Winds. Please read Ahrens Chapter 10
Local Winds Please read Ahrens Chapter 10 Scales of Motion Microscale: meters Turbulent eddies Formed by mechanical disturbance or convection Lifetimes of minutes Mesoscale: km s to 100 s of km s Local
More informationWIND SHEAR, ROUGHNESS CLASSES AND TURBINE ENERGY PRODUCTION
WIND SHEAR, ROUGHNESS CLASSES AND TURBINE ENERGY PRODUCTION M. Ragheb /18/17 INTRODUCTION At a height of about 1 kilometer the wind is barely affected by the surface of the Earth. In the lower atmospheric
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 informationHow an extreme wind atlas is made
How an extreme wind atlas is made AC Kruger South African Weather Service X Larsén DTU Wind Energy Wind 1 Atlas for South Africa (WASA) Why do we need extreme wind statistics? Statistical background for
More informationParameterizations (fluxes, convection)
Parameterizations (fluxes, convection) Heinke Schlünzen Meteorological Institute, University of Hamburg New resolutions - new challenges What is the current status? Surface fluxes Convection Towards improving
More informationAnalysis of long distance wakes of Horns Rev I using actuator disc approach
Journal of Physics: Conference Series OPEN ACCESS Analysis of long distance wakes of Horns Rev I using actuator disc approach To cite this article: O Eriksson et al 2014 J. Phys.: Conf. Ser. 555 012032
More informationSite Assessment Report. Wind farm: Ascog Farm (GB)
Site Assessment Report Energy Yield Estimation Wind farm: (GB) 3 x E- kw with 5m hh Imprint Publisher Copyright notice ENERCON GmbH 5 Aurich Germany Phone: +9 91 97- Fax: +9 91 97-19 E-mail: info@enercon.de
More informationWAKE MODELING OF AN OFFSHORE WINDFARM USING OPENFOAM
WAKE MODELING OF AN OFFSHORE WINDFARM USING OPENFOAM Alireza Javaheri, Beatriz Canadillas UL International GmbH (DEWI), Ebertstr. 96, 26382 Wilhelmshaven, Germany Summery The premier task of this work
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 information