What does the term "eutectic point" refer to?

The term "eutectic point" refers to the lowest achievable temperature of a secondary coolant mixture. In the context of coolants, particularly mixtures like brine or glycols, the eutectic point is significant because it represents the lowest temperature at which the mixture can operate before it begins to freeze. This is critical for refrigeration and cooling systems, as it allows operators to optimize the performance of secondary coolants in a way that maximizes efficiency while minimizing the risk of freezing and system failure.

At the eutectic point, the various components in the mixture crystallize together, leading to a solid phase that has a specific composition. This concept is utilized in many industrial applications, particularly in environments where maintaining low temperatures is essential. Knowing the eutectic point helps operators select the appropriate coolant mixtures for various processes and ensures reliable operation under cold conditions.