Non-condensable Gases in Refrigeration System

What can non-condensable gases cause in a refrigeration system?

a.) Low superheat b.) Low discharge pressure c.) High superheat d.) High discharge pressure

Answer

The presence of non-condensable gases in a refrigeration system can result in:

d.) High discharge pressure

Non-condensable gases, such as air or nitrogen, in a refrigeration system can cause high discharge pressure. These gases do not condense like the refrigerant and can accumulate in the system. As a result, the pressure in the discharge line increases, which can lead to various issues.

For example, if air is present in the system, it cannot be liquefied and removed during the condensation process. This leads to the air occupying space in the system and causing an increase in pressure in the discharge line. The high discharge pressure can reduce the efficiency of the refrigeration system and potentially damage the compressor.

It is essential to ensure that the refrigeration system is free of non-condensable gases to maintain optimal performance and prevent any potential damage. Regular maintenance and proper system operation are crucial in avoiding the accumulation of these gases.