Which type of oil is predominantly used in systems with HFC refrigerants?

In refrigeration systems that utilize HFC refrigerants, the predominantly used oil is Polyol Ester. These oils are specifically formulated to be compatible with HFCs, ensuring better solubility, lubricity, and overall performance within the system. Polyol Esters have excellent thermal stability and can handle the varying pressures and temperatures typical in refrigeration cycles, which is crucial for maintaining efficiency and preventing compressor wear.

Additionally, they possess lower viscosity, which enhances the oil's ability to circulate through the system effectively, ensuring that all moving parts receive adequate lubrication. This is particularly important in systems using HFCs, as these refrigerants can lead to reduced oil return if the wrong type of oil is employed. Using Polyol Ester oil helps to mitigate issues related to oil migration and ensures reliable operation without compromising the durability of the equipment.

Other oils, such as Mineral Oil and some Esters, may not offer the same level of compatibility and performance with HFCs, as they could lead to performance inefficiencies or possible system failure. Therefore, Polyol Ester is the preferred choice in systems utilizing HFC refrigerants.