Wind Resource Assessment 2014

Wind Resource Assessment 2014

Wind Resource Assessment 2014 

Registration And Morning Refreshments


Chair's Opening Remarks 

Richard Gale, Modelling And Late Development, Wind Yield Assessment , E.ON


The Assessment Of Three Different CFD Codes For The Wind Energy Business

  • A description of the principles used for the selction of the projects involved
  • A comparison of the different modeling approaches and technical issues 
  • An analysis of the results and the handling of different outputs
  • Selection of the most suitable CFD for the project analysis

Ferderico Focaia, Wind Analyst, E.ON


Wake Modelling And Its Effect On Turbine Layout 

  • Using CFD to model wake effects offshore
  • Modeling blockage effect between turbines using CFD
  • Considering stability measurements for wake modeling to increase the accuracy of wake predictions 
  • The challenges involved in interpreting wake effects from measured operational data

Eoghan Maguire, R&D Engineer , Vattenfall 


Benchmarking Wake Effects Models Against Production Data From Five Offshore Wind Farms 

Wake effects uncertainty is typically one of the dominant factors in the uncertainty budget for offshore wind farms. This presentation compares the predictions of a number of wake effects tools against production data from five offshore wind farms. Comparisons are peformed in terms of: 

  • Case studies ie. turbine by turbine power outputs under specific wind speeds and directions;
  • Array efficiency variations ie. the performance of the entire wind farm as a function of wind speed and direction; and, overall AEP

The results show generally good agreement between wake effects models and measured data. This bolsters confidence in using these models and suggests that the wake loss uncertainties typically applied in bankable EPE's are overly pessimistic. 

Neil Adams, Senior Consultant, Frazer Nash Consultancy Ltd


Networking Break And Morning Refreshments 


Using CFD To Model Canopy Effect

  • Factors to take into consideration when tuning canopy parameters: tree height, canopy density and canopy drag coefficent 
  • Implementing the coupling of mesoscale and microscale (CFD) models for improved canopy flow modeling 
  • Examining the effects of non-neutral atmospheric stability on canopy flows

Thomas Spalton, Senior Analyst , RWE


Combining CFD With Mesoscale Models For Accurate Long-Term Energy Yeild Predictions 

  • Advantages of combiing mesoscale and CFD models with respect to wind flow pattern determination and uncertainty reduction 
  • Assessing the effects of various coupling methods used to impose mesoscale data onto a mircoscale (CFD) grid
  • Translation, extrapolation and interpolation

Arne R. Gravdahl, Ph.D, CTO And Founder , Windsim  


Mesoscale And CFD Models For Offshore Wind Energy 

  • Using a mesoscale and CFD model to perform a complete energy yield calculation and subclass assessment for an offshore wind farm, even if no measurment is available 
  • Mesoscale model is used to obtain a complete wind resource assessment, including vertical wind profile and ambient turbulence. The performance of the model was tested for three offshore masts in the north and Baltic sea, obtaining a relative error of 1-2% on yearly wind speed
  • CFD is used to calculate detailed power losses and turbulence for each wind turbine and also the wake shadow of neighbor wind farms. Data from Hornsrev, Nysted and and Vindeby wind farms was used to validate the model and a 50% improvement over the standard approach (Wasp/Frandsen) was found 

Dario Patane, R&D Engineer, EREDA 


Networking Lunch 


Estimating AEP Using The Equivalent Wind Speed Concept

  • Examining the effect of atmospheric stability on hub-height wind speed
  • Methods for estimating equivalent wind speed
  • Factors affecting equivalent wind speed: hub-height power curve and wind shear
  • How can the equivalent wind speed power curve be used for accuate AEP estimation

Ioannis Antoniou, Advisory Engineer , Siemens Windpower


Estimating Heat Flux Using Met Mast Profiles 

  • Analysing the wind shear's diurnal and wind speed dependencies
  • How to filter the heat flux against on site wind distribution
  • Verifying heat flux estimations using ten tall (80m+) globally spread met masts
  • Uncertainty of the method 5-15W/m2

Frank Klinto, Head Of Wind And Site Competence Centre, Suzlon 


Using Nacelle Mounted LIDARs For Power Performance Measurement

  • Advantages of using a nacelle based LIDAR offshore to measure power curves
  • Methods for calibrating a nacelle based LIDAR offshore

Rozenn Wagner, Scientist , DTU Wind Energy


Networking And Afternoon Refreshments 


Methods For Obtaining An Accurate AEP Estimation Using LIDAR 

  • Using LIDAR to measure the effect of wind shear on the original power curve on site
  • Power perfomance measurement using LIDAR for large rotor diameters according to CD IEC61400-12-1 (Ed 2.) Points to remark for a successful campaign. 

Jordi Armet, R&D   Engineer   And Measurement Specialist , Alstom Wind 


Acheiving A More Accurate AEP Estimation  Through Detailed Analysis Of Measured Power Curves 

  • Implementing high quality site measurments as a basis
  • Combining power curve measurements to create a performance matrix
  • Using a performance matrix to calculate AEP
  • Using the inner and outer range methods as a first approximation for yeild and a pragmatic approach to power curve measurments

Tomas Blodau, Head Of Department - Wind And Site ,  Senvion 


PANEL DISCUSSION: Examining The Changing Requirements For Performance Verification 

In this session a group of panellists will debate the issue of power curve performance and its relationship to onsite measured data. 

Panellists include: 

Dr. Peter Clive, Senior Scientist, Sgurr Energy

Ioannis Antoniou, Advisory Engineer, Siemens Windpower

Rozenn Wagner, Scientist, DTU Wind Energy


Chair's Closing Remarks 


Drinks Reception

Join your fellow delegates for a glass of wine in a relaxed setting. 


“Great compilation of topics”

“Good forum for technical discussions”

“Confirmation of what way we as a company decided to go”

“A comprehensive and informative event, with a lot packed into 1 ½ days!”