Originally Posted by mpolli

The point of those is to drive turbines to generate electricity. Is that what you are going to do? I think you would need more height. Sorry no math for you. The idea is the same as a dam except upside down. So bigger drop/rise = more energy. And in this case the hotter the air at the bottom the better (obviously). I think that is why in the drawing they show large heat collectors at the base. The tower itself is not the collector.