Why is propylene glycol so popular for industrial chillers? It is highly effective for freeze protection, making it a reliable solution for maintaining chiller systems in optimal condition. Let’s explore its benefits and best practices for use.

What is Propylene Glycol?

Propylene glycol fluid is an ideal solution for maintaining the right operating temperatures and preventing freezing in industrial cooling systems, like water chillers. Unlike water, propylene glycol has a lower freezing point, which makes it perfect for chillers that need to operate in colder environments.

How Propylene Glycol Works in Chiller Systems

In a chiller system, propylene glycol serves one main purpose: freeze protection. It circulates through the chiller, absorbing heat from the system’s components and releasing it into the atmosphere.

Simultaneously, the fluid’s antifreeze properties ensure the system doesn’t freeze in low temperatures. This is critical for maintaining continuous, reliable operation, particularly in environments where ambient temperatures drop significantly.

Why Use Propylene Glycol in Chillers?

Let’s take a look at some of the key benefits propylene glycol offers for your chiller system.

1. Freeze Protection

Of course the biggest advantage of using propylene glycol is its ability to prevent freezing in colder climates or in systems that operate at low temperatures. By lowering the freezing point of the coolant, it ensures that the fluid keeps moving through the system without the risk of ice formation, which can cause severe damage to the chiller.

2. Corrosion Inhibition

Many chiller components, such as heat exchangers and piping, are made from metals prone to corrosion. Propylene glycol chiller fluid is typically blended with corrosion inhibitors that protect these parts, extending the life of your equipment.

3. Non-Toxic and Safe

Unlike ethylene glycol, which is highly toxic, propylene glycol is safe for use in food and beverage processing environments. It’s non-toxic, making it the preferred choice in industries where contamination could pose a health risk.

Using Propylene Glycol in Your Chiller

Propylene glycol fluid is a great option for chillers, but here are a few tips to get the best performance:

• Proper Mixing Ratios – It’s essential to use the correct glycol-to-water ratio for your system. Too much glycol can decrease the heat transfer efficiency, while too little may not provide adequate freeze protection. Most systems use a 30% to 50% propylene glycol mixture, depending on the operating temperature.
• Regular Testing – Over time, the glycol concentration can change due to system leaks or water evaporation. Regular testing of the glycol mixture ensures that the fluid retains its protective properties.
• Corrosion Inhibitor Monitoring – Ensure that the corrosion inhibitors in your glycol mixture remain effective by monitoring their levels. Replenishing inhibitors as needed will keep your system running smoothly and prevent equipment damage.

Glycol Correction Factors

When using glycol in chiller systems, it’s important to account for capacity loss due to the fluid’s higher viscosity compared to water. To maintain efficiency, Cold Shot Chillers designs heat exchangers with 30% more surface area, ensuring full capacity when using a 30% water-glycol mix. If your glycol concentration exceeds 30%, contact us for guidance on the best chiller selection for your needs.

Is it Time to Consider Switching to Propylene Glycol?

If your current chiller system is prone to freezing issues or operates in a sensitive environment, it might be time to switch to propylene glycol chiller fluid. Whether you’re dealing with extreme weather conditions or you need a safer alternative to toxic coolants, propylene glycol can provide the protection and efficiency you need to keep your system running reliably.

If you’re looking to maximize your chiller’s performance, consider upgrading to Cold Shot Chillers’ propylene glycol chiller fluid.

Improve Chiller Performance with Cold Shot

Cold Shot Chillers offers INTERCOOL® P-300 Glycol, a high-performance, industrially inhibited propylene glycol fluid. Designed for demanding applications, this glycol delivers superior thermal stability, with an operating range from -60°F to 350°F. It’s formulated with advanced corrosion inhibitors and pH buffers, making it a reliable option for heavy-duty operations.

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