What is the primary non-condensable gas that may leak into a refrigeration system?

The primary non-condensable gas that may leak into a refrigeration system is air. When air enters a refrigeration system, it can lead to a variety of operational issues. Air is composed primarily of nitrogen and oxygen, which do not condense in the refrigeration system, hence they are categorized as non-condensable gases.

These gases can negatively affect system performance by increasing the pressure, resulting in higher discharge temperature and reduced efficiency of the refrigeration cycle. This can also lead to more frequent cycling of the compressor and increased energy consumption. Additionally, the presence of air can cause improper heat exchange in the condenser and evaporator, ultimately leading to potential system failures or damage.

Knowing that air is the primary non-condensable gas helps technicians focus on identifying leaks in a system and understanding the overall implications of air infiltration, which is critical in maintaining efficient and effective refrigeration operation.