hey where is the temp sensor the ac uses? cause this evaporator can get far colder than 60C just warning you, 60C is the room temp but the evaporator can go below freezing if it dun know better, if you mount this in the window and the temp sensor is outside your box it might just freeze the water and keep running LOL. those sensors are usually checking the air temp and if it's let's say 72C in your apartment and the sensor is outside the cooler it would keep going and going LOL.
hmmm dual cascase ac and the pelts, I'd need 30% ethylene glycol 50% plus isopropyl and 30% water hmm let's see - 30C anyone :P probably could get it colder than dry ice, if I had a clue what cooling mix to use.
Also a hint if you wired the temp sensor in there you could put it right above the water level air is an insulator and get the water colder that way However you'll have to play around how far above the water you will go and look at the temps, put a thermometer in the water and play around.
good luck
terramir