How to Make Air Cooler at Home - Easy Way
By For Kids - sdiK roF
I’m gonna make one of these.
And: Eco-Cooler: The Zero Electricity Air Cooler
By Grameen Intel
Not sure how I’d do this @ my house so it’d look OK.
I guess I get to be the first to say it: COOL! 
Yeah, that’s a very cool idea. The compression doesn’t actually do the cooling of the air, though. The air temperature drops as the air expands coming out of the bottle neck.
Doesn’t that just heat up the air? Or is it outputting the heated air elsewhere?
I was about to post that compressing would make the air hotter, but as usual, I’m late.
There is no heated air to output. In the Joule–Thomson effect, the decrease in internal energy of an expanding non-ideal gas is greater than the increase in internal energy as it compresses at the pressure transition.
My temper would get extremly hot trying to figure that out and it would prolly be winter anyway by the time I did.