AHU's Glycol coil design concern
AHU's Glycol coil design concern
(OP)
thread403-282138: Glycol vs. Water
Is there any experience(concern) of 4.5 degree C LAT glycol coil in AHU to share?
Is there any experience(concern) of 4.5 degree C LAT glycol coil in AHU to share?





RE: AHU's Glycol coil design concern
RE: AHU's Glycol coil design concern
http://www.temperaturecorporation.com/pdf/glycolco...
Here's a list of concentration of glycol to water and the freezing points. If you were to have the water approach -5C, then 30% propylene would be a good choice (it gives you some wiggle room). Propylene glycol is what I prefer, but there are many options out there.
Here's something to think about; most glycol solutions come in 30% minimum. Anything less than 30% do not have the biologic contamination protection, and testing stations will be required. Most outside solutions are 30%, with some getting to 40%. Anything over 40% usually doesn't provide the protection to cost benefit. Glycol will make the water heavier and decrease the heat transfer capabilities, so sizing with glycol is the way to go, not adding glycol later, as the system might not work properly now.