asdar

I thought of an idea to modify this a bit. If you search for downdraft towers there's a concept that was first patented in the U.S. and revitalized by an Israeli student. It's almost the exact opposite of this tower.

Basically you take a tall tower and spray water at the top into hot dry air. The evaporation cools the air forcing a downdraft that can turn turbines at the bottom. Well, my idea is to build the cool downdraft tower inside the Hot updraft tower. This tower is supposed to be 400m diameter, just like the updrafter tower EnviroMission is building. (Pi X 200 squared)

To get the exact same area for the hot updraft The outer diameter would be 501m diameter. ((Pi X 250.5 squared) - (Pi X 200 squared)

I'd bury the cool downdraft turbines with exhaust vents that go out to the end of the greenhouse skirt and direct the air at neutral or inward.

This way you'd get Hot dry air for the cool downdraft and Cool air to heat and rise for the solar updraft. I'd think this would have to drastically lower the construction cost of doing both separately and they could both share all of the various control systems that any large power station has to pay for.

The one requirement that might be difficult is that the downdraft requires water, saltwater is ok, but it does need water.

The perfect location for one of these is Somalia, Djibouti or any of the hot dry eastern African nations that border the Ocean because the low technology required and the minimal maintenance. As a side benefit this desalinates water as a by product of the whole thing.

I'm not trying to sell anything, this is just a raw and probably impossible idea that banged around my empty head.