Principles of propylene glycol refrigeration

Hello, are you asking what is the principle of propylene glycol refrigeration? The principle of propylene glycol refrigeration is that propylene glycol has a low freezing point and can be mixed with water in any proportion. Water freezes at 0°C. There are many processes that require certain media to be cooled to temperatures close to this, or equipment to be placed in environments well below this temperature, so we need to use a liquid other than pure water to ensure that it doesn't freeze inside the chiller or piping, causing equipment damage and downtime. Propylene glycol is much less toxic, and with its low freezing point and ability to mix with water in any ratio, as well as good heat transfer properties and low viscosity (which makes pumping easier), propylene glycol refrigeration is preferred for many of these applications.