Final answer:
POE (Polyol Ester) is the synthetic lubricant that is used with ternary refrigerant blends containing HCFCs. It ensures compatibility and proper function of refrigeration and air conditioning systems by being miscible with HCFC refrigerants. Other lubricants like mineral oils and PAG are not suitable for these systems.
Step-by-step explanation:
The synthetic lubricant used with ternary refrigerant blends containing HCFCs (Hydrochlorofluorocarbons) is POE (Polyol Ester). POE lubricants are designed to be compatible with the use of HCFC refrigerants in refrigeration and air conditioning systems. This compatibility is crucial because the refrigerant and lubricant must be miscible to ensure the proper lubrication of the compressor and the efficiency of the heat transfer process.
Mineral oils and alkylbenzene (AB) lubricants are typically not recommended for use with HCFC blends as they may not be miscible, leading to issues such as poor oil return and lubrication failures. PAG (Polyalkylene Glycol) lubricants are generally used with purely HFC (Hydrofluorocarbon) refrigerants and are not the choice for systems with HCFC refrigerants.