Moisture most frequently enters low pressure chillers through which source?

Moisture most frequently enters low pressure chillers primarily through air leaks from areas with gaskets or fittings. This is due to the nature of low pressure systems where any imperfections or degradation in gaskets and fittings can create pathways for ambient air to enter. When air, which contains moisture, leaks into the system, it can condense and lead to various issues, including reduced efficiency and potential corrosion within the system.

Low pressure chillers often operate at atmospheric or slightly above atmospheric pressures, making them more susceptible to air infiltration compared to high pressure systems. The presence of moisture can adversely affect the refrigerant and compromise the operation of the chiller. Proper sealing and regular maintenance of gaskets and fittings are therefore critical in preventing moisture ingress.

Air leaks in the rupture disc assembly, tube leaks, and air leaks from the charging valve can also contribute to moisture entry, but they are less common compared to those from gaskets and fittings. Regular inspections and preventative measures focus more on maintaining the integrity of gaskets and connections to ensure optimal performance of the chiller.