Posted by Joe Fischer on April 8, 2007, 10:19 pm
On Sun, 08 Apr 2007 21:10:42 +0100, Eeyore
Of course, if you don't observe daylight savings time.
All of the posts except Bill's arrive here early.
Posted by Eeyore on April 8, 2007, 7:53 am
Hysterical leftwing global warmers must DIE wrote:
Rubbish. Wind turbines come sizes up to 2MW these days and 5MW wind turbines are
in the pipeline.
Posted by Erdemal on April 8, 2007, 9:24 am
2 MW at what wind speed?
I checked and found it is at 15 m/s (= 54 km/h = 33 mph).
The power of wind varies as the cube of speed so:
54 km/h > 2 MW
25 km/h > 0.250 MW
12 km/h > 0.030 MW (0kW)
12 km/h is rather the average wind speed than 54 km/h!
There too, the investor part of the site is larger than the technical part.
Posted by Eeyore on April 8, 2007, 10:53 am
This size of turbine is probably most suited to offshore wind farms.
Posted by Eeyore on April 8, 2007, 11:03 am
Says who ?
Vestas V90-3MW. Looks more like square law to me which is what I'd expect.
15 m/s > 3MW That's your 54 kph
10 m/s > 1.6MW
7.5 m/s > 750kW 27 kph
5 m/s > 250kW (close to the cut in speed)