Rutland 913 Windcharger
Owner’s Manual
Document SM-130 Issue G 26.10.06
5
Marlec Engineering Co Ltd
SITING THE WINDCHARGER
General Considerations
The location and height of the mounting pole or tower for your wind turbine will
be the major factor in the overall performance of your system. The smooth flow
of wind over land and water is often interrupted by a multitude of obstructions
causing wind sheer and turbulence.
Wind sheer
describes the interference between the fast moving upper air and
the slow moving air close to the ground and the resulting decrease in average
wind speed as one gets closer to the ground.
Turbulence
is caused by the wind passing over obstructions such as moored
boats, trees, and buildings.
Both wind sheer and turbulence diminish with height and can be overcome
simply by putting the turbine sufficiently high above them as shown in Fig 1.
Windspeed decreases and turbulence increases where obstructions exist.
Consider also that downwind obstructions can be as detrimental to performance
as upwind obstructions.
It is therefore essential that the wind generator should be located in an area as
free as possible from disturbed wind flow.
W IN D D IREC T IO N
A REA O F T U RB U LEN C E
2 0 H
2 H
2 H
H
Fig.1
