The compressor controls the low side boiling temperature by controlling:

The correct answer is based on the fundamental principles of how compressors operate within refrigeration and air conditioning systems. The low side boiling temperature in these systems is directly related to the pressure of the refrigerant in the system.

When the compressor operates, it compresses the refrigerant vapor, raising its pressure and temperature. The low side of the system is where the refrigerant is evaporating (absorbing heat), and this occurs at a certain pressure corresponding to the boiling point of the refrigerant at that pressure. By adjusting the pressure on the low side, the compressor effectively controls the boiling temperature of the refrigerant.

For instance, if the pressure in the low side is increased, the boiling point of the refrigerant also increases, leading to a higher boiling temperature. Conversely, reducing the pressure allows the refrigerant to boil at a lower temperature, thus facilitating greater cooling efficiency.

While flow, temperature, and superheat are important aspects of compressor and system design, they are not the primary factors that dictate the low side boiling temperature. The interplay of pressure within the system is the key aspect that directly influences this boiling temperature. Therefore, understanding the relationship between pressure and boiling temperature is crucial in managing the efficiency and effectiveness of refrigeration systems.