Reports have also indicated superior adiabatic efficiency of three to ten percent in these compressors when compared to naphthenic refrigeration oils. CO2-oil minimum miscibility pressure (MMP) is a key parameter in CO2 enhanced oil recovery (CO2-EOR) process. 11. Adequate miscibility, many believe, provides oil return to the compressor. POE oils gener-ally offer good CO 2 miscibility. 1234yf refrigerant gas. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) Synthetic, polyalphaolefin-based refrigeration oils are described as not miscible with CO 2. In the field of lubricants and lubrication technology, refrigeration oils are of particular importance. While HFC refrigerants may have desirable physical properties that make them appropriate long term refrigerant alternates, they lack miscibility with naphthenic mineral oils traditionally used as refrigeration compressor lubricants. If refrigerant oil did the same thing—that is, if it remained in the Presently, synthetic polyol esters have been selected for use with HFC refrigerants, such as R-134a, which are considered appropriate alternatives to CFCs. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. POE oils is also more hydrolytic stable than PAG oils. Very good miscibility behavior with refrigerants allowing a good oil return (down to –60 °C at the evaporator). The oils have good miscibility with R-12 and superior stability. As mentioned in our mineral oil section the POE oil was selected for HFC usage to achieve acceptable miscibility between the refrigerant and the oil and also to provide sufficient lubrication to the compressor. V. CONCLUSIONS Solubility and low temperature miscibility of refrigerants … Immiscible Suva R-134A (HFC) / BVA 3 (MO). The series was specifically de-veloped for HFC refrigerants. Lubrication Complete R-12(CFC) / BVA 3 (MO) R-134a (HFC) and RPOE LT 32 (POE) Partial R-22 (HCFC) / BVA 4 (MO) R-134A (HFC) / RPOE 68 (POE). • Share refrigerant/lubricant property data and trends including miscibility, solubility and viscosity date for low GWP refrigerants with lubricants • Describe results for thermodynamic cycle modeling and system performance testing of several low GWP refrigerants in various applications. Systems using R 12 as refrigerant use mineral oil as lubricant and SEETUL RFL grades are found compatible with residual mineral oils and R 12 grades. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. CO2, NH3, R22, R1234yf or R134a. General properties of refrigerants and requirements. POE oils are also compatible with hydrocarbons such as R290 propane and R1270 propylene. In an automotive engine, motor oil stays in the crankcase where it belongs. Have a high dielectric strength . Mineral oils typically used with R-22 has relativity low Miscibility with R-410A. Modern HFC and HFO refrigerants tend to use Polyolester (POE) oils, although some HFC blends specifically designed as "drop-in" retrofit gases for CFCs and HCFCs may have some tolerance to MO and AB oils. The long lifetime expectations of refrigerant compressors are closely related to the high quality requirements of the used lubricants. POE oils are also compatible with hydrocarbons such as R290 propane and R1270 propylene. The authors will review the mechanical issues in miscible vs non-miscible naphthenic hydrocarbon oil-based lubricants. Values of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil were studied, CFC HCFC... Of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil ( MO.... 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