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 Originally Posted by MadMojoMonkey
I'm saying... I can give a "back of an envelope" idea of this, but it's probably going to be so vague as to be common sense.
That's my hedge.
We'll see.
I decided to look for the source of this model before I went on to speculate over our hypothesis. This is the only thing I found that seems to match the description that I gave. It has no references, and is of dubious authority.
http://www.i4at.org/surv/aircond.htm
Turns out, the cooling shaft is only half the story.
It's hard to make sense of the description in #7 in the link. I think it's saying that there is a chimney at the top of the building, which is square-shaped in cross section. The points of the square are oriented along the cardinal directions (NESW). The SE and SW faces should be painted black to absorb heat from the sunlight which falls on them. The NE and NW faces will always be in shadow, so don't need to be black. I'm not sure why they need to be clear.
This would heat the air in the tube, lowering the pressure. Assuming the house is a mostly sealed vessel, then the greater pressure from the cooling shaft's opening will drive flow into the house, and push the heat out of the exhaust tube. This would initiate a flow.
Keeping the windows and doors closed and sealed would be hugely important to keep the inflow from being diverted away from the cooling shaft.
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