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+38 (067) 55-999-07 An aqueous solution of propylene glycol
Aqueous propylene glycol is a safe liquid that can be used in many industries. For example, confectionery and cosmetics, food industry, tobacco industry. However, it is popular to buy a propylene glycol solution as an environmentally friendly and safe coolant or refrigerant.
Why use a propylene glycol solution for heating and air conditioning systems?< /h3>
Propylene glycol solution recommended for:< /strong>
- autonomous heating systems for private homes and businesses
- refrigeration units
- air conditioning systems
- propylene glycol solution for heat pumps
- solar panels
- chillers
- cooling systems
It can also be used in open loop systems and at food enterprises.
Properties of an aqueous solution of propylene glycol from Novokhim Company:
- DOES NOT FREEZE, unlike water
- SAFE for humans and the environment
- Corresponds to the specified crystallization temperature (according to the table)
- This is a ready-made liquid, does not require additional dilution
- Good for system materials and rubber seals
IMPORTANT! One of the most important components of the solution, in addition to distilled water, are additives.
It follows from the above that this solution, produced under industrial conditions with the addition of all necessary components, including a combined additive package, will be more durable, stable and safe in operation.
The density and freezing of a solution directly depend on its concentration. Below is a table for clarity.
Table 1.
Freezing point and density of propylene glycol aqueous solutions.
| Propylene glycol aqueous solution concentration</ span> | Freezing Point | Density at 20C°</ span> | Propylene Glycol 30% | -13 C°< /td> | 1,023 | Propylene glycol 35% | -20 C°< /td> | 1,028 | Propylene glycol 40% | -25 C°< /td> | 1,032 | Propylene Glycol 45% | -30 C° < /td> | 1,035 | Propylene Glycol 50% | -35 C° < /td> | 1,038 | Propylene Glycol 55% | -45 C°< /td> | 1,040 | Propylene Glycol 60% | -55 C°< /td> | 1,042 | Propylene glycol 65% | -60 C°< /td> | 1,043 | Propylene Glycol 70% | -65 C°< /td> | 1,044 |
Propylene glycol solution will cost slightly more than ethylene glycol solution. However, the safety and environmental friendliness of its use is worth it. Moreover, the use of ethylene glycol solutions is recommended only for heating systems with a closed expansion tank.
Read more about the ethylene glycol solution here
During operation, especially if water was previously used in the system, some features and characteristics of the propylene glycol solution should be taken into account:< /span>
- The viscosity of a glycol solution is 2-3 times higher than that of water. This means that the movement of the aqueous solution through the pipes of the system will be normal if a powerful circulation pump is installed. With a power reserve of 10-15%.
- The coefficient of thermal expansion of propylene glycol is greater than that of water. Therefore, it is rational to use an expansion tank with an increased volume.
- Prevent the solution from boiling to avoid irreversible changes in properties.
- The heat capacity of aqueous solutions of propylene glycol is 10-15% lower than that of water, which somewhat reduces heat transfer.
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