I once used dry ice to cool my apartment. I had 10lbs of it in front of a fan blowing it around. Not the best way since you need to keep the air fresh...(Dry ice becomes C02 when it sublimates and is toxic, which means a window needs to be cracked open to the heat outside. And then there's the danger of physically handling that stuff)
It only lasted for a day though. Too expensive in the long run to use.