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  • one is the obvious one that it gets harder to manipulate the big items (blades, towers). Road transport puts absolute limitations on the size of what can be built onshore (around the 3MW limit); offshore can go further with factories directly on the seaside or near rivers;

  • another is that it is not so obvious that there is any economic gain in building bigger turbines. The economies of scale come from the size of the wind farm, compared to the cost of development, permitting, cable connexion and land use. On land, it made sense, with limited room available, to squeeze more MW in the same spot by using fewer turbines. If you have no land limitations, then you can put more turbines and intermediate sized ones might work just as well;

  • I'm not the best placed to comment on that (maybe Crazy Horse can) but I understand that the strains on the structures from really big turbines become massive, and hard to manage unless you seriously increase costs to reinforce the wind turbines / towers.

So we'll see. There's been talk of 5-10MW turbines offshore, but I've never heard any proposal to go beyond.

In the long run, we're all dead. John Maynard Keynes
by Jerome a Paris (etg@eurotrib.com) on Sat Dec 8th, 2007 at 03:13:36 AM EST
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