Brand Ea Site Identification Etc Final31mei2010

Site Identification and Optimal Plant Design for Onshore and Offshore Wind Plants Arno J. Brand ECN Wind Energy

Outline ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Design drivers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Site identification Mean wind Turbulence Seconds … Years

Design drivers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Site identification Mean wind T u r b u l e n c e Seconds … Years

Wind resource assessment ,[object Object],[object Object],[object Object],[object Object],[object Object],Site identification

Wind resource assessment ,[object Object],[object Object],[object Object],[object Object],Site identification

Topography and land/sea use Site identification Offshore Onshore Conditions Complex Flat Forested

Turbulence and stratification Site characteristics Offshore Onshore Conditions Stable Unstable Stratification Low High Medium Turbulence Complex Flat Forested

Recovery distances Site characteristics Long Short Medium Recovery distances Offshore Onshore Conditions Stable Unstable Stratification Low High Medium Turbulence Complex Flat Forested

Optimal spacing Optimal plant design Long Short Medium Recovery distances Offshore Onshore Conditions 7D … 10D 6D … 7D 4D … 5D 5D … 7D 2D … 3D 4D … 5D Optimal spacing Most frequent wind directions Least frequent wind directions Stable Unstable Stratification Low High Medium Turbulence Complex Flat Forested

Optimal hub height Optimal plant design Long Short Medium Recovery distances 20 + D/2 D 2h + D/2 D Optimal hub height Offshore Onshore Conditions 7D … 10D 6D … 7D 4D … 5D 5D … 7D 2D … 3D 4D … 5D Optimal spacing Most frequent wind directions Least frequent wind directions Stable Unstable Stratification Low High Medium Turbulence Complex Flat Forested

Experience ,[object Object],[object Object],[object Object],Optimal plant design

Experience – Row effect ,[object Object],Optimal plant design Turbine layout x x x x Limit for large number of wind turbines Actual loss depends on spacing and wind speed Wind direction

Experience – Array effect ,[object Object],Optimal plant design Turbine layout x x x x Wind direction

Experience – Neighbour effect ,[object Object],Optimal plant design Actual loss depends on distance, layout and wind speed Turbine layout x x Wind direction Impact on annual energy production depends on wind rose

Turbine layout ,[object Object],[object Object],[object Object],[object Object],Optimal plant design

Optimised turbine layout ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Optimal plant design

Optimised turbine layout ,[object Object],[object Object],Optimal plant design

Optimised turbine layout Optimal plant design Navier Stokes solver

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Brand Ea Site Identification Etc Final31mei2010

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