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These so called "environmentally-friendly" wind turbines are all well and good, but surely statistically 50% of the time the wind is blowing the other way? This will make them spin in the opposite direction, sucking power from the grid instead.
And, in lots of areas there is one predominant wind direction. In my place, there is far more wind from the east than from the west.
But one thing I a curious about: If the wind is coming from the north, then N-NW, NW, W-NW, W... and so on, the wind direction goes the entire circle around, and the turbine follows, all the way around. You get the power from the generator down to the ground through quite heavy cables. Will the twist up, just like a rope of hemp? Or is there a mechanism in the wind mill saying "Enough is enough! I must turn of for a little while so I can rotate back to Mark Zero, to unwind the power cord"? Or do they have sliding contacts? The big mills can deliver quite a few megawatts; that puts some requirements to a sliding contact!
Or is the generator steady, the blades rotating around the vertical generator shaft? To me it doesn't look like that from most photos; it looks as if the generator is located behind the blades, with a direct horizontal shaft from the blades to the generator.
I am asking out of pure curiosity and lack of knowledge - windmills are certainly far out of my field of profession!
But can they really transfer 5-10 megawatt of effect (that's what recent windmills can deliver!) across a sliding connection? If you have 0.1% loss, that is still a 10 kW heater! I guess that would be totally unacceptable. So, how large are the losses?
Regarding that deer lady: If it is a prank, it is a good one! But really: In quite a few places with lots of moose (for deer as well, but the moose is a bigger problem here), they have actually put up tall fences along the highway for a few hundred meters so the the moose cannot cross, and then a gate, pre-warned by "Moose crossing" signs, a few places even with flashing orange warning lights in season (they are not equally active all year around). In a few places, they have rather built bridges over the four- or six lane motorway for the moose - letting them cross six lanes of cars driving 100 km/h is too dangerous even with controlled crossing points, signs and flashing warning lights.
In Norway, approximately 1500 moose are hit by cars every year, half as many deer, and 4-5000 venison. The moose is by far the most dangerous one, due to their weight and their long legs: When you hit them, they will fall over your hood and come through the windshield.
You proabably cannot read this Norwegian newsstory, but look at the top picture in Moose crash[^]. You don't want to experience something of that sort in 100 km/h!
Last Visit: 31-Dec-99 18:00 Last Update: 10-May-21 19:39