What is the effect of allowing air to enter a refrigeration system?

Allowing air to enter a refrigeration system can significantly impact its performance and longevity. When air infiltrates the system, it introduces non-condensable gases, which can lead to an increase in discharge pressure. This occurs because the air does not condense like refrigerant, leading to a higher pressure in the system than intended.

In addition to raising the discharge pressure, the presence of air in the system reduces overall efficiency. The compressor must work harder to handle the increased pressure, which can lead to increased energy consumption and additional wear on the system components. This inefficiency ultimately drives up operating costs and may shorten the lifespan of the equipment.

Furthermore, the introduction of air can contribute to acid formation within the refrigerant. Moisture, which is often present in the air, can react with the lubricant oil and refrigerant, leading to the development of acids. This acid can cause corrosion and damage to various components of the refrigeration system, further compounding the efficiency losses.

In summary, allowing air to enter a refrigeration system raises the discharge pressure, reduces efficiency, and contributes to acid formation, resulting in negative impacts on system operation and durability.