Posted by admin | Posted in Wind Turbines | Posted on 09-10-2009
Tags: energy, environment, review, turbine, wind
Wind turbines power output?
The large wind turbines across Europe and the UK appear to revolve around 12 to 15 rpm. I'm curious what kind of power being generated at that speed. Is it possible to calculate horsepower that is easy to identify.
An equation for wind energy production are here: Power = 0.5 x Swept Area X Air Density x Velocity3 where v = wind speed. W (angular velocity) = RXV (where r is the leaf length, v is velocity, x is cross product). There will be some scaling factor, but you can ignore all this in an intelligent, knows that the power output is proportional to the speed and hence hte angular velocity cubed. Try and find the maximum rpm and maximum power of a wind turbine, then use an rpm * ^ 3 = power output at maximum rpm and maximum output U out to find his constant A. Then use the rpm observed constanat to calculate the power output at 12-15RPM. If you are interested in average power output, which is called "capacity factor and can Google it. The mean accepted for wind farms is 30%, land in wind farms in the UK recently has been about 27%, offshore wind is expected to be 35-40%. This is the average percentage its maximum output. The average wind turbine being built today can be 2, 2.3, 3 or 3.6MW. The average power of 2 MW turbine therefore the 2 * 0.3 = 0.6MW. REpower and others are the release of 5 MW turbines at sea 2011-2012 and expected factor of 35-40% capacity, so I got up at 5 * 0.4 = 2 MW of those.
Vertical Axis Disk Wind Turbine
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