Mono Ethylene Glycol Freezing Point

With the development of the construction sector, mono ethylene glycol has taken on a very important role in human life. People feel a sense of coolness when they enter indoor spaces in the summer heat. Indoor spaces have heating and cooling systems.

These systems are closed-loop systems. The most important factor providing cooling and heating in closed-loop systems is water. To provide the necessary cold air in these systems, water must acquire chemical properties to be resistant to very low temperatures.

How to Lower the Freezing Point of Water?

To prevent the water circulating in closed-loop systems from freezing up to a certain temperature, the water must be modified with glycol. The freezing point of a mixture of water and mono ethylene glycol will decrease as the amount of mono ethylene glycol in the solution increases.

The most important point here is that the freezing point of mono ethylene glycol is -13 °C. However, when mixed 50/50 with water, the freezing point of the solution will be around -36.8 °C. With this chemical effect, the cooled water will not freeze even at very low temperatures. This ensures sustainable cold and hot air.

Problems Occurring in Closed-Loop Systems

Corrosion occurs in closed-loop systems. Corrosion causes punctures and bursts in the metal due to the problems it creates within the metal. As a result, malfunctions and major problems occur in heating and cooling systems.

Therefore, a corrosion inhibitor is used to prevent corrosion formation in closed-loop systems. Corrosion occurs in environments with hard water due to the erosion of metal. Inhibitors protect the metal surface by forming a gel layer.

What are the Different Chemicals Used in Closed-Loop Systems?

There are different chemicals to lower the freezing point of water. These chemicals are as follows:

• Mono Ethylene Glycol
• Mono Propylene Glycol
• Dipropylene Glycol
• Triethylene Glycol

Among these chemicals, ethylene glycol should not be used if there is a possibility of mixing with drinking and utility water. Instead, propylene glycol should be used.

Use of Ethylene Glycol in Water-Cooled Engines

Ethylene glycol is the most important known antifreeze liquid. Antifreeze additives added to vehicle engines are produced with mono ethylene glycol. In addition, corrosion inhibitors and algicide must be used.

One of the most important issues in antifreeze production is the type of metal in the area where the antifreeze will be used. Mono Ethylene Glycol is a corrosive substance. Therefore, it has the ability to erode metal. For this purpose, corrosion inhibitors suitable for the metal are used.

Which Chemicals are Used with Monoethylene Glycol to Delay Freezing?

Propylene glycol has antifreeze properties like monoethylene glycol and can help lower the freezing point of liquids. Its antifreeze effect can be increased by using it in combination with MEG.

Glycol ethers can improve antifreeze performance when used with monoethylene glycol. Especially triethylene glycol (TEG) and diethylene glycol (DEG) are commonly used glycol ethers for this purpose.

Protective additives or inhibitors can prevent corrosion and rusting of liquids when used with MEG. Water is another common additive used to increase the antifreeze effect of MEG. Water and MEG mixtures can help prevent freezing at lower temperatures.