What is the impact of rapid lowering of suction pressure on a compressor?

The impact of rapidly lowering suction pressure on a compressor is primarily associated with the phenomenon of liquid slugging. When suction pressure is reduced too quickly, it can lead to a drop in the compressor's ability to handle vapor correctly, potentially causing any liquid refrigerant present in the system to be drawn into the compressor. This liquid slugging occurs when liquid refrigerant enters the compressor, which is designed to compress gases rather than liquids.

The presence of liquid in the cylinders can result in hydrodynamic shock, leading to mechanical damage to the compressor components, such as valves and pistons. This situation can severely impair the operation of the compressor, leading to inefficiency and potential failure. Therefore, understanding the implications of suction pressure adjustments is crucial for safe and effective compressor operation.

Other alternatives may suggest benefits or efficiencies from lowering suction pressure, but in the context of compressor operation, the primary concern is with liquid slugging and the negative consequences that ensue from rapidly reducing the suction pressure.