Antifreeze is used for the purpose of protecting the unit from freezing damage. When the water turns into ice it can be very damaging. Antifreeze is used as a heat transfer fluid. It is used in many things for example it is used in HVAC chillers and also in solar water heaters. There are certain chemical elements that are added to the water to help with reducing the freezing point. So that it can be at the lowest temperature. This temperature is what the unit will be most likely to handle. It is also helpful in protecting the unit from corrosion.
Antifreeze helps the freezing point when you mix it with water. But it also helps with the boiling point as well. So antifreeze can also be called anti-boil. It is used in car engines because it works so well as a heat transfer fluid. When it used in the cars engine people call it engine coolant because that is exactly what it does to the engine.
One of the most commonly used antifreezes is ethylene glycol. Ethylene glycol is a water-based solution. It works as a great heat transfer fluid. It is used as a heat transfer fluid when the temperature is able to get below 32 degrees Fahrenheit or 0 degrees Celsius. It is used most often when the unit works by a water-cooled engine. For example it is most commonly used in cars and machines.
You should be aware that it is not safe to use this type of cooling and heating agent when you are operating food processing equipment. The reason for that is because if there is any chance of leaking it can be poisonous. When operating food processing equipment it is better to use another agent such as propylene glycol. Ethylene glycol is an organic compound. Not only is it used in cars and machinery. But it is also used in air conditioners and liquid cooled computers. It has a low freezing point because of the low freezing point it is very resistant to freezing.
Ethylene glycol has such a high boiling point and its compatibility with water. It is a useful desiccant. It is also used as a way to inhibit the formation of natural gas clathrates. It is used in long multiphase pipelines that convey natural gas from remote gas fields to an onshore processing facility.
Antifreeze has many different uses and when people hear the word freeze they just thin of cold. But in this case it can be used for cold or hot units.
Source de Matthew McKernan