Despite its hugeness, the current proposal is actually substantially scaled back in size from the original gargantuan 4,000 foot monster they had planned for the site a couple of years ago. Still, when completed, only the Burj Khalifa in Dubai will be taller.
To be constructed by a company called Solar Wind Energy, the Solar Wind Downdraft Tower is a pretty simple in concept. Cool water is pumped to the top of the massive tower, where it is sprayed as a fine mist over the opening. The hot dry air absorbs the moisture, which causes it to become denser and fall into the top of the tower. By the time it reaches he bottom, the air is moving at high speed, and can be diverted into a cluster of wind turbines grouped around the base.
Solar Wind Energy says that the tower will produce about 1,200 Megawatts during the hottest months, which is more than all but the very largest nuclear power plants.