Where does refrigerant go after it leaves the purge unit of a low-pressure centrifugal system?

In a low-pressure centrifugal system, after refrigerant leaves the purge unit, it is sent to the evaporator. The purpose of a purge unit is to remove non-condensable gases and moisture from the refrigerant circuit, ensuring that only usable refrigerant returns to the system. Once the refrigerant has been purified in the purge unit, it needs to return to a point in the system where it can absorb heat, which is primarily the function of the evaporator.

In the evaporator, the refrigerant undergoes a phase change from a liquid to a vapor as it absorbs heat from the surrounding environment. This is a critical process in refrigeration cycles since it is where the cooling effect is produced. By understanding this flow, technicians can diagnose and maintain the efficiency of low-pressure refrigeration systems effectively.