Which component operates within normal parameters with a suction pressure of 32 PSIG?

The correct answer is the screw compressor. In industrial refrigeration systems, the screw compressor plays a crucial role by compressing the refrigerant vapor drawn from the evaporator. The suction pressure of 32 PSIG indicates the pressure at the inlet of the compressor, which should be within a typical operational range for many refrigeration systems.

Screw compressors are designed to handle a variety of suction pressures, and 32 PSIG would typically be considered an acceptable level, allowing for efficient compression of the refrigerant. This ensures that the refrigerant can be compressed to a higher pressure, facilitating the heat transfer process essential for the refrigeration cycle.

In contrast, the other components mentioned have different roles and operational parameters. The expansion valve primarily regulates the flow of refrigerant into the evaporator and does not operate based on suction pressure directly. The evaporator, while it does interact with suction pressures, its primary function is to absorb heat from the surroundings and convert liquid refrigerant into vapor; it's responsible for lower pressures rather than maintaining a higher suction pressure. The condenser, on the other hand, is meant to reject heat from the refrigerant after it has been compressed, and its operation relates more to discharge pressure rather than suction pressures. Understanding these functions highlights why the screw compressor