Low Wind Turbine
Why do wind turbines have to rotate at a constant speed?
I am aware that the blades of a wind turbine are capable of ‘feathering’ or rotating on their own axis so as to adjust the angle of attack from the wind and thereby regulate the rotation of the turbine as a whole. The faster the wind speed the slighter the angle of the blades to the wind and therefore the lower the turning force.
But what is the importance of maintaining a constant rotational speed? Do I understand this correctly? Is the feathering simply to keep the rotational speed of the turbine within broadly acceptable limits or is it very important to maintain a constant rotaional speed with minimal variation?
People have often commented that large wind turbines always seem to be going at the same speed regardless of the wind speed.
They dont rotate at a constant speed, however they may appear to do so because they ar generally positioned where there is a constant wind!
In reality the blades move about their axis to make them as efficient at harnessing the wind as possible, and also to prevent damage to the turbine. In high winds the propellors shed the wind and stop to prevent damage.
Inside there are rectifiers and transformers and all sorts of trickery that changes the power produced to a form that can be exported and used (te correct frequency, phase, voltage etc), and this makes the speed of the rotor irrelevant.
You often see the turbines stopped as they turn to face a new wind direction and they do this by altering the blade angle rather than with mechanical brakes!
10 KW Low Wind Turbine
|
|
Toyota Prius Japan Photo Mugs car, Toyota, Prius, Japan, Japanese, Asia, Asian, silver, 2008, 2000s, current, contemporary, hatchback, hatch, car, 3, door, static, hybrid, electric,…. |
|
|
Sunforce 22005 12-Volt MotoMaster Eliminator Folding Solar Panel $95.00 Imagine being able to charge your cell phone, MP3 player or portable video game console while you catch some rays on the beach. This versatile and portable solar power panel can recharge the batteries on many consumer electronics, or simply power them outright. Sunlinq Folding Solar Power Panels are lightweight, flexible, weatherproof and durable CIGS (copper indium gallium diselenide) solar cells… |
|
|
Sunforce 45444 600W Wind Turbine $674.95 Generate power day and night with the Sunforce 600 Watt Wind Turbine. This versatile wind turbine charges both 12 Volt and 24 Volt battery banks to help run your appliances and electronics. Ideal for cabins, 12 Volt battery charging, remote power, back-up power and more, this unit is made with aerodynamic fiber glass blades to ensure low wind noise. Built with a weatherproof industrial design, thi… |