that is an absolutely excellent point. i only had 1 chiller that was an open tank and that was a long time ago.
Originally Posted by Nuclrchiller
typical minimum flow rates are around 3 feet per second minimum but i don't know what you have for a chiller barrel.
Originally Posted by fxb80
this whole thread seems to me to center around the water molecules separating out or freezing at 32F instead of the SOLUTION freeze point temperature. this is not true in a flowing system. the water molecules are going to stay in solution and not freeze out separately and collect in the coldest part of the system (evaporator).
i do not have any chillers that have a design evaporating temperature colder than the solution freeze point...that would be dumb and counter productive. i have run across systems that were improperly maintained and had an evaporating temperature lower than the solution freeze point (due to low flow rates) and they did occasionally make slush...but i believe that it was a solution slush, not a water slush and the glycol still a fluid.
Once you go black...you never go back to galvanized.