What is the consequence of increasing air in the refrigeration system?

Increasing the amount of air in a refrigeration system primarily leads to an increase in head pressure. This is because air introduced into the refrigerant circuit can cause a rise in pressure due to the presence of non-condensable gases, which do not condense in the heat exchangers. As a result, the compressor has to work harder to compress the refrigerant, leading to higher head pressure.

The increased head pressure can strain the system, resulting in higher energy consumption and potential overheating of the compressor. It may also lead to a reduction in the overall efficiency of the refrigeration cycle, as the system is not able to absorb heat properly with the presence of non-condensables.

This answer is especially relevant in the context of maintaining a refrigeration system, as managing the amount of air and ensuring that the system is free from leaks and non-condensable gases is crucial for optimal operation. Proper maintenance and monitoring can help prevent unwanted increases in head pressure, keeping the system running efficiently.