« on: June 20, 2010, 05:53:27 AM »
It is a good idea if you are going to boil full batches and not add 2gal of wort to 3 gal of pre boiled then cooled water.
Fundamentally, a wort chiller is a heat exchanger. Think car radiator but instead of radiator fluid you have wort, and instead of air you have cold water. Heat exchange is proportional to the temperature difference, the surface area and the flow rates on both sides of the barrier. A simple heat exchanger is the immersion chiller hooked up to the kitchen sink. To increase cooling you could hook up your immersion cooler to an ice bath and recirc the cooling water through this. (you may have heard of intercoolers on boats that go in sea water) To increase cooling more you can move the wart past the cooling medium as well. Hence a counter flow chiller. (flow can be in the same direction but counter flow has advantages of less thermal stress etc.) These are reasonably easy to make. Now go brew.