Which property should refrigerant oil ideally have?

The ideal property for refrigerant oil is low moisture content. Moisture in refrigerant oil can lead to various problems, including the formation of acids and sludge, which can damage the refrigeration system and compromise its efficiency. Low moisture content helps ensure that the oil can effectively lubricate the compressor and maintain the reliability of the entire cooling system.

The presence of moisture can also cause the oil to lose its effectiveness and lead to corrosion within refrigeration components. Therefore, maintaining low moisture content is critical for the long-term performance and durability of refrigeration systems.

In contrast, other properties, such as high pour point, low flash point, and high viscosity, may not be optimal for refrigerant oils because they can negatively affect the oil's ability to provide proper lubrication and thermal management within the system.