Saturday, May 16, 2009

harnessing natural resources

On a hill about 40kms from Geraldton stand these turbines. The are, according to the sign, the world's largest turbines - 78m high with 41m blades. There are 54 of them. The sign also claims that they can supply enough electricity for 60,000 homes.
Surprisingly, more wind does not mean more power. The blades turn at a steady 14.4 revolutions per minute (220km/h!) in winds above 35km/h or 18kts. If winds reach 65km/h or higher, they shut down to avoid damage.