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If you have a way of getting unlimited free ice (unlimited free cold water also works), you can run it through a radiator. Get a radiator of any kind, get a water pump and find a way to run the water in the bucket through the radiator. Put the radiator in front of a fan. As long as there is cold water running through the radiator, it will produce at least some cooling. Just don't think you can create ice in the same room you're trying to cool, a fridge generates more heat than the cold it produces. This barely works whenever I have to do it but it is better than nothing and it can make a difference if you just need the room to be a little cooler so you can sleep.
The entire problem with this is that ice or cold water is a really shit form of cooling and the only thing that's any better is.. Compressor a/c. Peltier plates look good on paper but once you hook them up to a heat transfer system, you'd be surprised how useless 500 watts worth of peltiers are for transferring heat. Swamp coolers only work on the desert. Ammonium nitrate can generate cold when it gets dissolved into water but the only way to make a sustained cooling system out of that involves boiling the water to get the ammonium nitrate back so you can reuse it so fuck that.
Alternatively, scientists invented some kind of metal that gets cold when you bend it but good luck figuring out how to make that.
Wouldn't the radiator form condensation, and make a mess?
Water does condensate on the radiator but not enough to make a mess, at least when I do it. Emptying the water and replacing it with fresh ice so it will be cold again is the part that makes a mess, so lay down towels if that is a concern.