Looking at nature
itself is usually an excellent guide to finding a suitable wind turbine site. If there are trees and shrubs in the area, you may
get a good clue about the prevailing wind direction , as you do in the picture to the left. If you move along a rugged coastline,
you may also notice that centuries of erosion have worked in one particular direction. Meteorology data, ideally in terms of a wind
rosecalculated over 30 years is probably your best guide, but these data are rarely collected directly at your site, and here are
many reasons to be careful about the use of meteorology data, as we explain in the next section.If there are already wind turbines
in the area, their production results are an excellent guide to local wind conditions. In countries like Denmark and Germany where
you often find a large number of turbines scattered around the countryside, manufacturers can offer guaranteed production results
on the basis of wind calculations made on the site. Look for a view We would like to have as wide and open a view as possible in
the prevailing wind direction, and we would like to have as few obstacles and as low a roughnessas possible in that same direction.
If you can find a rounded hill to place the turbines, you may even get a speed up effectin the bargain.