by The_Toecutter » Fri 18 May 2007, 02:09:39
$this->bbcode_second_pass_quote('', 'I')n the past 20 years, wind technology has come a long way. The cost has dropped dramatically and continues to drop as conventional power sources become more expensive. Modern wind turbines can produce more and more power (currently, the large ones can produce 1.5 megawatts each and 2-3 megawatt types are currently under testing and development).
There exist larger wind turbines, even in the 5 MW range.
http://www.renewableenergyaccess.com/rea/news/story?id=21962
Also, while there is more than enough wind power real estate available in the Dakotas alone to provide all of this nation's electricity needs without further encroaching on the environment, there are practical limitations.
Factoring in weather instability and lack of reactive power produced by asynchronous AC induction generators, we can only have a maximum of about 20% of our electricity from wind with a large national electricity grid, assuming you want the energy available at prices comparable to conventional sources. Storing energy produced by wind is difficult and expensive, otherwise it would be practical to have even more of our electricity from wind. However, this is better than nothing, and it is a very large chunk. The problem again comes back to politics. While wind is cheaper than coal or oil or natural gas, it doesn't have the same profit margins. Thus, less than 1% of America's electricity is from wind, when realistically, it could easily be 20% or so without any downside to the consumer. The coal lobbyists, military, defense industries, and oilies have done everything they can to stall this development. Thus today, the rate of growth in wind energy is painfully slow compared to what is needed. Here and there are a few green washing campaigns by Exxon and GE that they use to parade around a large growth in wind energy, but the real truth is, these companies don't want wind to take away from use of more profitable energy sources too quickly.
I've built a working wind machine and I plan to build a much larger one with an 80 foot tower and 25 foot blade when I get my own property. Get a 30 kWh bank of military surplus NiCds to store the energy made by that bitch, along with an array of solar panels and a diesel genset running on hemp oil as backup, and I'd have a pretty sweet off grid RE system to charge my electric car and run all the modern comforts I intend to have in my trailer(refrigeration, videogames, computer, lights, ect.). Once it's set up, not one drop of fossil fuels will be needed and I won't need to make a lot of money to live comfortably. I'll be putting so much less money into the economy, which is precisely why TPTB don't like off-grid solutions or solutions that provide the same living standard with much less spending or energy involved.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson