Yeah I had, but there are others who are from the USA which is why i mentioned it.
You can't just send the water round and round and hope it will cool off. It needs somewhere to float around with its mates, have a few pints and chill out basically. A fish tank would do, or a fish bowl. In order for me to work out the size of the bowl I would need loads of data and i don't want to do that since i dislike thermodynamics.
Also you need a few case fans to make sure condensation doesn't start to build up on the pipes and drip down onto other componants.