the coolant given will also be just normal running water (tap water)... ntn else sholud be used !!!!!!! simple construction also... pl give me some sites where i can find details fr making it..
A length of Cu tubing. Connect one end to the source of hot water, the other end to where you want the cooled water to come out. Then place a loop of the tube in a bucket of cold water. Depending on how hot the hot water is, how long your copper tube is, and how fast (mass flow rate) the hot water is going thru the tube, you will be able to cool the hot water down to, at the best, the temperature of the water in the bucket.