Many
residential areas are not suitable for wind turbines as buildings and trees
shade the wind and create turbulence which can reduce the efficiency and
lifespan of a turbine considerably. Generally speaking, the ideal location is
on top of a high mast on a south westerly facing hill with gently sloping sides
surrounded by clear countryside which is free from obstructions such as trees,
houses or other buildings. Here the wind flows relatively smoothly and steadily
enabling it to drive wind turbines with greater efficiency.
Wind
turbines operate less efficiently in areas where obstacles interfere with wind
flows. It is very important to understand and account for these reduced
efficiencies when considering the use and economics of wind turbines in such
areas.However, such areas, with less than ideal aspect and local conditions,
may, with a good quality turbine system, have a sufficient wind resource to
make an installation worthwhile. The predominant and most energetic winds in
Ireland typically come from the southwest and west, so it is especially
important that there are few or no obstacles to the turbine in these
directions.
Ideally, the turbine should be 10m above any
obstacle within 100m. As a rule of thumb, a wind generator should be installed
no closer to an obstacle than at least ten times the object's height, and on
the down wind side. The preferred distance is twenty times the height of the
object.
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