What causes "slugging" in a compressor?

Slugging in a compressor refers to the situation where liquid refrigerant enters the compressor instead of vapor. This can cause significant damage to the compressor components, as compressors are designed to compress gas, not liquid. When liquid enters the compressor, it can lead to hydraulic lock, where the liquid cannot be compressed, causing excessive pressure and potential damage to internal parts.

The ingestion of liquid refrigerant typically happens due to high levels of refrigerant being present in the system, which is often a result of an overcharged system or inadequate vaporization before reaching the compressor. In a well-functioning refrigeration system, the refrigerant should be fully vaporized by the time it reaches the compressor. Hence, identifying and addressing slugs of liquid refrigerant in the system is critical for the longevity and efficiency of the compressor.

In summary, the ingestion of liquid refrigerant into the compressor is the primary factor leading to slugging, highlighting the importance of ensuring adequate refrigerant management within the system to maintain optimal operation.