An advantage of using glycol instead of salt brine as an intermediate cooling medium is:

Using glycol as an intermediate cooling medium offers the significant advantage of eliminating corrosion, which is a crucial consideration in applications involving metal components. Glycol solutions are less corrosive compared to salt brine, which can lead to rust and corrosion in pipes and cooling systems.

Corrosion can cause structural damage, reduce the lifespan of equipment, and increase maintenance costs. By utilizing glycol, systems can maintain their integrity over longer periods without the detrimental effects commonly associated with salt brine. This property makes glycol a preferable choice for many applications, especially in contexts where metal surfaces and long-term durability are concerns.

While cost, freezing point, and density are important factors to consider when selecting a cooling medium, the elimination of corrosion directly contributes to improved efficiency and reduced maintenance, which is fundamental for system reliability.