As a blend approaches true Azeotropic qualities, what happens to temperature glide?

As a refrigerant blend approaches true azeotropic qualities, the temperature glide decreases. This is because an azeotropic mixture behaves like a single substance during phase changes, meaning that it will vaporize and condense at a consistent temperature without any significant variance. In contrast, blends that are not azeotropic exhibit temperature glide, which is the difference between the temperature at which the refrigerant mixture evaporates and the temperature at which it condenses.

When a blend becomes closer to being an azeotrope, the components within the blend interact more closely, resulting in a more uniform phase transition. Therefore, as the blend's azeotropic characteristics improve, it loses the variability in temperature glide, leading to a reduction in the glide itself. This is important in refrigeration applications, as more stable performance can be achieved with reduced glide.