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Originally Posted by jgoldsney
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Hey jgoldsney, nice to talk to you again..
Great link, Actually if you were to coild the copper tubes around a 'very thin' walled pipe that is food safe and connect the thin wall pipe to a small pump for more contact time with the coil, you have just created a very crude exchanger. The theory is that the heat from the tank water slowly pasing through the coil section will be pull out. Essentualy you are creating a simple emmersion chiller. Here is a link to a cheap home made chiller used by people that brew their own beer.
http://www.allaboutbeer.com/homebrew/equip/chiller.html