30 Sep '11, 5pm

A New Way to Skin the Renewable Energy Cat | Alternative Energy

A New Way to Skin the Renewable Energy Cat | Alternative Energy

It's not often that I come across a new type of renewable energy and think, "This could really work." But that's what I thought when I heard the concept for the downdraft tower proposed by Clean Wind Energy Tower (CWET.OB .) First, a couple caveats. The concept is not new, it's been around 25 years in draft form. The physics is simple. Build a very tall, hollow tower in a hot, dry climate; cool the air at the top with a mist of water (even salt water will work), and capture the resulting energy from the downdraft with an array of wind turbines arranged around the bottom. Most of the water is condensed at the bottom of the tower, and (since it has been effectively distilled) used as fresh water, a valuable commodity in the dry regions that are appropriate for downdraft towers. Because the tower needs to be extremely tall in order to make the downdraft strong enough to gener...

Full article: http://www.altenergystocks.com/archives/2011/09/a_new_way...

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