What defines a "dry expansion" system in refrigeration?

A "dry expansion" system in refrigeration is characterized by the refrigerant fully evaporating before it reaches the compressor. In this type of system, the liquid refrigerant is allowed to expand and absorb heat in the evaporator coil before the vapor returns to the compressor. This ensures that only vapor enters the compressor, preventing any liquid refrigerant from causing potential damage to the compressor components, which could occur if liquid refrigerant entered a compression chamber.

Understanding this concept is crucial, as it directly relates to the efficiency and functionality of refrigeration systems. Proper operation of a dry expansion system ensures that the refrigerant absorbs heat effectively, maintaining the desired cooling capacity while safeguarding the mechanical integrity of the compressor.