What is the primary function of a refrigeration system's evaporator?

The primary function of a refrigeration system's evaporator is to absorb heat. In the refrigeration cycle, the evaporator plays a crucial role in maintaining the desired temperature in the refrigerated space. It does this by allowing low-pressure refrigerant to enter the evaporator coil. Within the evaporator, the refrigerant changes from a liquid to a gas as it absorbs heat from the surrounding environment or the substance that needs to be cooled. This heat absorption effectively cools the air or fluid that passes over the evaporator coils, thereby achieving the refrigeration objectives.

The ability to absorb heat is fundamental to the cooling process, as it sets off the cycle that allows the refrigeration system to function. By removing heat from the interior space, the evaporator helps maintain a low temperature, which is essential for preserving food, pharmaceuticals, or other temperature-sensitive materials in commercial and residential applications.