What is the high stage compressor suction temperature in a two-stage package system?

In a two-stage refrigeration system, the high stage compressor is responsible for compressing refrigerant vapor from the evaporator to higher pressures. The suction temperature at the high stage compressor is critical as it directly impacts the efficiency of the refrigeration cycle and the overall performance of the system.

The correct value of 24°F represents an optimal temperature that strikes a balance between ensuring sufficient refrigerant vapor enters the high stage compressor while maintaining a suitable degree of superheat. This temperature is typically above the saturation point for the refrigerant used, which helps avoid liquid refrigerant entering the compressor and potentially causing damage.

Operating at this temperature allows the system to function efficiently, enabling effective heat exchange in the evaporator while minimizing the potential for compressor flooding. If the suction temperature is too low, operational issues such as liquid slugging may occur, leading to compressor failures or reduced efficiency.

Choosing 24°F as the suction temperature aligns with common operational standards within two-stage systems, where maintaining appropriate temperatures is crucial for optimal functioning and longevity of equipment.