When water concentration increases in Ammonia, what effect does it have on the SAT temperature?

When the concentration of water in ammonia increases, it leads to an elevation in the saturation temperature (SAT temperature) of the ammonia solution. This phenomenon occurs because the addition of water to ammonia effectively changes the properties of the solution, influencing its boiling point and saturation behavior.

As more water is mixed with ammonia, the overall solution behaves differently than pure ammonia alone. The increased presence of water raises the solution's temperature at which it can sustain its gaseous state under pressure, thus resulting in an increase in the SAT temperature compared to standard saturation charts that assume pure ammonia properties. This relationship is critical in processes where precise temperature control is necessary, particularly in refrigeration and conditioning systems that utilize ammonia as a refrigerant. Understanding this concept allows operators to adjust their approach when dealing with ammonia-water mixtures, ensuring efficient operation and safety in various applications.