Temperature glide in refrigerant mixtures: what it means in practice

Temperature glide occurs mainly in zeotropic mixtures, meaning that phase change does not occur at a single temperature.

During evaporation

The refrigerant temperature changes as it evaporates.

During condensation

Similarly, the temperature changes during condensation.

Dew and bubble point

For accurate assessment, different saturation temperatures are used depending on whether vapor or liquid is being examined.

Practical significance

Incorrect use of these values can lead to inaccurate superheat or subcooling calculations.