Wind Generators

GENERAL CONSIDERATION

The location and height of the mounting pole or tower for the wind turbine will be the major factor in the overall performance of the 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.
Boat 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. Wind speed 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.

250W VERTICAL AXIS WIND GENERATOR