At that height the cylinder will have to be well insulated and the interior surface will have to be very smooth since this is working on passive energy concepts. That is a lot of head pressure on the pumps. There will have to be pump landings along the way or the piping prices for that pressure will be really high. That means an access elevator.
On Thu, Nov 15, 2012 at 1:10 AM, Jon Findley <[address removed]> wrote:
Here is another wakie idea. And it takes water to cool the air. Seems like it is working agaisnt nature to use a down draft of air. One source said it would be 3,000 feet tall!! And the water to make it work? Pumped from a desalinization plant that has never been economical to run - up hill to the tower and the 3,000 feet in the air? That in itself would take a lot of energy.
Innovative Renewable Energy Technology - The Downdraft Tower
"The Downdraft Tower has the capability of being operated with virtually
no carbon footprint, fuel consumption, or waste production." ---Absolutely NOT true. It has a gigantic carbon footprint when you consider the concrete production and transportation and the energy needed to desalinate and transport the water.
-- Jon Findley
"I cannot understand why people are frightened of new ideas. I'm frightened of the old ones..." --Nicola Tesla
-- Ray Alfini PE Manager, AlfiniSolutions LLC [masked] Cell "I'd put my money on the sun and solar energy. What a source of power!
I hope we don't have to wait till oil and coal run out before we tackle that." - Thomas Edison [masked])
"I cannot understand why people are frightened of new ideas. I'm frightened of the old ones..." Nicola Tesla
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