The amount of temperature increase above the saturation point is called:

Superheat temperature is the term used to describe the amount of temperature increase above the saturation point of a refrigerant in the vapor phase. In the context of refrigeration and HVAC systems, superheating is crucial because it ensures that the vapor refrigerant is well above its boiling point, thereby preventing any liquid refrigerant from entering the compressor. This is important for the efficient operation of the system and protects the compressor from potential damage that could occur if liquid refrigerant were to enter it.

Understanding superheat temperature helps technicians monitor and adjust system performance, ensuring that the refrigerant is in the appropriate state for efficient heat exchange. Proper superheat levels indicate that the evaporator is properly sized and that the system is charged correctly, leading to optimal energy efficiency and system longevity.