FAQ
WHAT IS “SUBCOOLING”?
Subcooling is the temperature fall beyond the condensing temperature of a refrigerant.
WHAT IS “SUPERHEATING”?
The superheating refers to the difference between the outlet temperature of the evaporator and the evaporating temperature dew point at a defined pressure.
WHAT DOES MEAN “GLIDE”?
During the boiling process for a refrigerant, the temperature at which a liquid refrigerant first begin to boil is known as bubble point temperature. The temperature at which the last drop of liquid refrigerant has boiled is known as the dew point temperature. In the condensing process for a refrigerant, the dew point is the temperature at which the refrigerant vapour first begin to condense. The bubble point is the temperature at which all of the refrigerant has been condensed to liquid. For pure gas refrigerants (like R134a) the bubble point temperature is equal to dew point temperature. For some of the refrigerant mixtures (like R407C or R407F) the bubble point temperature is not the same as dew point temperature. For these last type of refrigerant the difference between the saturated vapour temperature (dew point temperature) and saturated liquid temperature (bubble point temperature) at constant pressure is referred to as the “temperature glide” of the refrigerant mixture.
WHAT IS “BUBBLE POINT”?
The bubble point is the temperature at which a liquid forms bubbles (usually the lowest boiling point of one of the constituents of a mixture like R407C).
WHAT DOES MEAN “DEW POINT”?
The dew point is the temperature at which a vapour will condense, or when associated with glide, the higher or highest boiling point of the mixture.