Compressors in refrigeration systems are primarily sized based on which requirement?

In refrigeration systems, compressors are primarily sized based on CFM requirement, which refers to the cubic feet per minute of airflow needed to maintain proper cooling and efficiency within the system. The CFM is critical because it directly affects the system's ability to move air across the evaporator and condenser coils, influencing the overall heat transfer process.

When selecting a compressor, it is essential to ensure that it can handle the specified airflow to provide adequate cooling for the space being served. This involves calculating the cooling load, which accounts for factors like heat gain from the environment, equipment, and occupants. Sizing the compressor based on CFM requirements ensures that the system operates efficiently and effectively while avoiding issues such as short cycling or inadequate cooling.