What refrigerant is good miscibility with oil?
What refrigerant is good miscibility with oil?
R-406A showed very good miscibility, indicated by a maximum separation temperature of -36″F. Each maximum occurred near a concentration of 20% oil in refrigerant.
Which refrigerant is least miscible with oil?
HFC-143a
HFC-143a is least miscible among the three pure HFC refrigerants.
What type of oil is used with CFC refrigerants?
synthetic oil
Alkylbenzene (AB) is a synthetic oil used in refrigerant systems with CFC or HCFC refrigerants.
Does oil and refrigerant mix?
Oil and refrigerant vapor do not mix readily, and the oil can be properly circulated through the system only if gas velocities are high enough to sweep the oil along.
Is Poe oil hygroscopic?
HFC refrigerants and POE oils have a polar molecular structure, which attracts the polar water molecule. POEs are also hygroscopic and can pick up more moisture from their surroundings and hold it much tighter than the previously used mineral oils.
What is Polyolester oil?
Polyolester oil (POE oil) is a type of synthetic oil used in refrigeration compressors that is compatible with the refrigerants R-134a, R-410A and R-12. HFC-134a with POE oil as the lubricant is a replacement for CFC-12 with mineral oil as the lubricant.
What oil is used with R600a?
mineral oils
For R600a compressor, mineral oils (VG10 to VG22) have been used mainly and recently the mineral oil ofVG8 was developed and used actually. To improve the energy efficiency of R600a compressor, the refrigeration oil that has the viscosity lower than VG7 is investigated and developed.
Can you mix Poe oil and PVE oil?
Re: Mixing of POE oil in PVE oil Its like oil and water, they don’t mix.
Is refrigerant and refrigerant oil the same thing?
Even though the refrigerant is the working fluid required for cooling, the lubricant or oil is needed for lubrication of the compressor’s moving mechanical parts. Oil minimizes mechanical wear by reducing friction. Oil also maintains a seal between the high and low side of the compressor.
What is refrigerant oil?
Refrigerant oil is a special high-temperature formulation designed for use in cooling systems, so it is important to use the recommended lubricant for the equipment. Oil that is too heavy will not flow smoothly to all working parts.
What is the chemical miscibility of the refrigerant?
The chemical miscibility of the refrigerant-lubricant pair is a good indicator of how well the refrigerant will help move the oil around the system. Miscibility is typically studied by mixing known concentrations of refrigerant and oil and lowering the temperature until a phase separation is observed.
Why is it important to miscible the oil in the refrigeration system?
However, the oil in the refrigeration system is a contaminant that lowers the efficiency of the refrigeration system. Therefore, it is important that the oil and the refrigerant are miscible with each other so that oil following the refrigerant out in the system is returned to the compressor and not accumulated in the system.
Should I use mineral oil when retrofitting to an HFC refrigerant?
It is always better to move to POE or PVE oils from mineral oil when retrofitting to an HFC refrigerant, but small amounts of mineral oil have proven to be rather inconsequential in most cases.
Can mineral oil be used as a refrigerant?
Mineral Oil. Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well.
