What is the primary function of the evaporator?

The primary function of the evaporator is to transfer heat from the refrigerated space to the refrigerant. This process is essential for the cooling effect in refrigeration and air conditioning systems. When the refrigerant enters the evaporator, it evaporates and absorbs heat from the surrounding air or space, which cools that area down. As the refrigerant absorbs heat, it changes from a liquid to a gas, which is a critical part of the refrigeration cycle. This heat absorption is what allows the refrigerant to cool the air inside a refrigerator or air conditioning unit.

The other functions mentioned, while related to refrigeration processes, do not accurately describe the main function of the evaporator. For instance, releasing heat to the surroundings occurs in the condenser, where the refrigerant is compressed and releases absorbed heat. Cooling the refrigerant before compression is a function associated with other components like the condenser. Measuring temperature, while important in the operation of a refrigeration system, is not a primary function of the evaporator itself.