differences between two wind atlases (2005-01-19)

[Old Forum Archivist]

Hello,


When I have two masts close one to another, I can produce two wind atlases. At which point these two atlases must be similar to consider them representative for the whole region? Is there a limit in m/s in wind speeds between two wind atlases when they can be considered as completely different?



Thank you in advance

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There is no specific limit beyond which two wind atlases cannot be considered to represent a certain area. Normally it is recommended to use windatlas #1 (based on mast #1)to make a prediction for the wind climate at mast #2. If the difference in mean wind speed (omni directional and in the important sectors)is more than, say 5%, then the reason for that should be investigated, e.g. poor instruments, poor calibration of instruments, non-adequate terrain description (e.g. re. roughnes). Fixing identified deficiencies one should be able to the difference down below the 5%.



The WAsP Team.

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