Rotor Position with Respect to Tower Upwind configuration

The upwind configuration is the one most commonly chosen. The principal advantage is that the tower shadow effect is much less for the same blade-tower spacing, reducing both dynamic loads on the blade and rhythmic noise effects. Set against this is the need to take great care to avoid the risk of blade-tower strikes with upwind machines, requiring accurate prediction of blade deflections under turbulent wind loading.

The clearance between the undeflected blade and the tower can be increased by tilting the low-speed shaft upwards or by increasing the rotor overhang. It is desirable to keep the rotor overhang small in order to minimize low-speed shaft and nacelle bedplate bending moments, so the low-speed shaft is normally tilted upwards by 5° or 6° to provide the necessary blade-tower clearance, at the cost of a very small reduction in power output.

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

Get My Free Ebook


Post a comment