What indicates a low solubility of refrigerant oil?

A low solubility of refrigerant oil is indicated by the presence of carbon dioxide. The interaction of refrigerant oil with refrigerants can be impacted by the presence of certain gases, including carbon dioxide, which can form a distinct phase and affect the ability of the oil to remain dissolved in the refrigerant mixture.

In refrigeration systems, the solubility of oil in the refrigerant is critical for effective operation. If the oil does not dissolve properly, it can lead to lubricant starvation of the compressor and reduced cooling efficiency. The formation of a separate phase of oil can halt the effective circulation of the oil needed for lubrication.

While factors such as high temperature, low pressure systems, and high humidity can influence refrigeration operation in various ways, they do not specifically indicate low solubility of refrigerant oil in the same direct manner as the presence of carbon dioxide does.