What is the role of a filter drier in a refrigeration system?

The role of a filter drier in a refrigeration system is primarily to remove moisture and contaminants from the refrigerant. This function is critical because moisture in the refrigeration system can lead to several problems, such as corrosion, freezing of expansion valves, and formation of harmful acids.

The filter drier combines two essential functions: filtering out solid particulates and drying the refrigerant. It contains desiccant material that absorbs moisture and aids in ensuring the refrigerant remains clean and free from water and harmful debris throughout the system's operation. This helps maintain the efficiency and longevity of the system as proper refrigerant conditions are maintained.

While enhancing cooling performance and increasing refrigerant flow rates can be important factors in a refrigeration system, these are not the primary functions of the filter drier. Similarly, filtering out large particles is a part of its role, but it is not limited to just that; the key aspect is also the removal of moisture, which is critical to the system's overall health. Thus, the choice stating that the filter drier’s primary role is to remove moisture and contaminants is the most accurate.