*HFC retrofit gases operate best with POE oils, however they have been designed to operate also with MO and AB oils that were commonly used with R22. This content is provided 'As is' and is subject to change or removal at any time. When the temperature drops to a certain value, the paraffin begins to precipitate. Vapor pressure (solubility) is measured using calibrated, constant volume cells at oil mass fractions 30, 50, 70, 80, and 90% over a temperature range from -20 to 100 °C, and pressures up to 5 MPa. But the miscible status of the mixed solution tended to be worse as the mass fraction of OMO-2 increased, especially at the range of 17–37%. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. Suitable for very low evaporation temperatures down to -80° C. HFC refrigerants on the market today are the primary users of POE oil. • Miscibility occurs when the refrigerant is in the liquid phase and mixes with the lubricant. Figure 1 represents the miscibility of each refrigerant with mineral oil. Is there one that is better over the other? 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. R32 has poor miscibility with refrigeration oils relative to R410A, R32 causes a large drop in the viscosity of the oil when dissolved in it. - Viscosity: resistance to temperature variations. It is compatible with mineral oil and compared to mineral oil, it has improved refrigerant miscibility at low-temperature conditions which is why it was and is often used with HCFC refrigerants in commercial refrigeration. When HFC refrigerants began to gain popularity the use of mineral oils started to decline. As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. Recommended for Retrofitting with HCFC Service Blends Because of its exceptional history in working with R-22, due primarily to its excellent miscibility with this refrigerant, Zerol has been identified by compressor and equipment manufacturers as the oil of choice in retrofitting to the On the one hand, the results confirmed the favourable solubility of HCFCs refrigerants with the mineral oils. Most of the time new compressors will come prefilled with oil but if they are not or you need to add oil to your system then please please use what the compressor calls for. It is formulated from specially refined paraffinic base oils in combination with additives selected to minimise system deposits and provide long service life.

The goal of a refrigerant lubricant is to lubricate the compressor and to also have the appropriate miscibility and solubility characteristics to interact with the refrigerant accordingly. Less carbon build-up and good shear stability helps to extend drain intervals. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. - Flocculation point: important, particularly in the context of installation conversion. At the same time, the miscibility gap (LCST) differ much bigger for various refrigerant/lubricant mixtures. Oils that are soluble and miscible with the refrigerant are advantageous. Product Review: Elitech IR-200 Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134A Refrigerant. - Toxicity - Leak detection - Flammability - Miscibility with oil - Effect on foodstuff - Stability Physical properties of refrigerant. This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. - Solubility with the refrigerant in the gaseous state. For typical industrial systems, oil carryover is 15% or less. Previous: Relationship Between Refrigeration Oil And Compressor, Next: How To Distinguish Poor Quality Refrigerant, Halocarbon C318 C4F8 Octafluorocyclobutane Used as Propellant in Food industry and Refrigerants, Miscibility Of Refrigeration Oil And Refrigerant. In order to further improve oil performance, the problem is how to achieve good miscibility with the refrigerant while ensuring sufficient viscosity when the refrigerant is dissolved in the oil. Thanks for reading and I hope that I was able to answer your questions. To stabilise the oil balance, suitable measures for continuous oil return must be taken. Chances are that if you have an older R-22 unit installed that it is most likely using mineral oil. XIAMEN JUDA TRADING CO.,LTD.COOLMAX INDUSTRIAL CO.,LTD. It is also suitable for systems using CFC, HCFC … It shows better miscibility with R-22 at low temperatures, providing improved oil return. Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. What kind of refrigerant you are working with. Refrigerator Compressor Lubricant Shell Refrigeration Oil S2 FR-A is a low miscibility compressor lubricant intended for use in refrigeration compressors using Ammonia refrigerant. If the system suffers from inadequate refrigerant return, then it may be necessary to flush the original oil and replace with POE. in the refrigeration temperature range, and … There are many different types of oil that are used in the refrigeration cycle and it all depends mostly on two things: But, what are the different kinds of oils out there? This study tries to identify influence of oil-refrigerant solubility on the performance of refrigerant compressors. In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. How Much Is R-1234yf Refrigerant Per Pound in 2021? How do they differ? Regardless of what I have said above the safest method for when choosing an oil to use in your refrigeration unit is to follow the instructions on the compressor. @article{osti_417971, title = {Oil-return characteristics of refrigerant oils in split heat pump system}, author = {Sundaresan, S G and Radermacher, R}, abstractNote = {Currently, HFC substitute refrigerants for R-22 are being evaluated in air-conditioning and heat pump applications. (2) the cloud point is lower than the evaporation temperature; u Cloud point: Traces of paraffin remain in the frozen oil. Investigation Of Low GWP Refrigerant Interaction With Various Lubricant Candidates Roger J. Beattie Roger.beattie@lubrizol.com ... the miscibility of low GWP refrigerants with lubricants that can affect oil ... low oil carry-over and good oil sealing. - Miscibility with the refrigerant in the liquid state. 10. In addition to the favorable miscibility characteristics with the corresponding refrigerant, good cold flow properties, high aging resistance and high chemical and thermal stability play an important role. By blending a Also the refrigerant miscibility of RENISO PAG 1234 is favourable: a safe oil transport is guaranteed, no matter if R134 a or HFO-1234yf is used as refrigerant. However, R32 is known to have lower miscibility with refrigeration oils than … CP 4214-320 is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in screw chillers. In an automotive engine, motor oil stays in the crankcase where it belongs. u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. 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. The Trucking Industry & the Coming Shortage of R-134a. (Please note that while Alkyl Benzene oil can be used as a replacement in most mineral oil applications these two oils are not the exact same. https://refrigeranthq.com/ is a participant in the Amazon Services LLC Associates Program and The E-Bay Partner Program, affiliate advertising programs designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com or E-Bay.com. Remember, one of the leading causes of failures in automotive HVAC is contamination. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. These can include some of your most common refrigerants such as R-404A and R-410A. Alkyl Benzene oil is synthetic whereas mineral oil is not.) The miscibility values of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil were studied. eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. The physical, chemical and thermal properties of the frozen oil should meet the following requirements: (1) Appropriate viscosity: The viscosity is too large, the flow resistance is large, the frictional power consumption and starting resistance of the compressor will increase; the viscosity is too small, the lubricant film is not easily formed, and the sealing property is also affected. R32 is a refrigerant that excels in various applications and has seen wide use in recent years. Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. For example, if oil return While these synthetic oils have been around for decades they were always seen as too expensive when it came to using in CFC or HCFC systems. One of the most important characteristics of the oil is miscibility with refrigerant and good miscibility is usually acceptable. Because of this the time allowed for the compressor to be exposed to the atmosphere is much much shorter than what you may be used to for R-22. How Much Is R-22 Refrigerant Per Pound in 2021? The properties of the oil selected must be suitable for this purpose. different refrigerant liquid and the lubricating oil solubility is different, the same refrigerant oil with different solubility is different also, some complete miscibility, sometimes almost insoluble, dissolve and some parts. The oil-refrigerant mixture Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. Is there a 1234yf Air Conditioner Recharge Kit? POE oils is also more hydrolytic stable than PAG oils. Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. 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. The measurements of low temperature miscibility limit Generally, when the refrigerant has good miscibility with the refrigeration oil, dissolved refrigerant will … Lastly, some companies have stated that it is ok to mix oils like Mineral with POE but from what I have found in my research the best advice is to NOT mix oils. refrigerant and oil, the new oil must be miscible with the old oil in the system. Miscibility and stability in R 12, the older systems using the R 12 gasses were evaluated and cSt over temperature range -40 to 100°C show no abnormality in ranger concentration of 1 - 30 %. HFC units could not use mineral oils due to them proving insufficient lubrication and due to the mixing ability of mineral oils. Good miscibility and solubility facilitate the return of oil to the compressor, which is important for its reliable opera-tion and for system performance. These numbers refer to the viscosity of the oil, similar to 10W30 oil. In these cases using mineral oils may be acceptable but again always check with the compressor and the refrigerant to ensure accuracy. The second issue is lubricity. R -40 1 A showed phase separation at the highest temperatures, with a maximum separation temperature above 80"F. The next best miscible product was R-409A, which showed a maximum separation temperature at 23"F. R … The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. As a .result, used refrigerant oil must be categorized as off- specificailon used oil. Reports have also indicated superior adiabatic efficiency of three to ten percent in these compressors when compared to naphthenic refrigeration oils. This could eventually cause failure of the compressor and other components due to little or no lubrication. One last point of note is that POE oils absorb moisture at a much faster rate than mineral oil. As I stated above the primary users of PAG oil are automotive applications. Due to the miscibility of oil and refrigerant, used refrigerant oil often becomes contaminated with chlorine and fluorine (halogens) at concentrations greater than 4,000 ppm. 5. The physical, chemical and thermal properties of the frozen oil should meet the following requirements: If refrigerant oil did the same thing—that is, if it remained in the - Lubricity: related to the thickness of the oil film. Miscibility charts are specific to lubricant-refrigerant combinations and are read based on the evaporator temperature and the percentage of oil carried over into the evaporator for the application in question. Different concentrations of oil-refrigerant mixtures are tested. How Much Is Refrigerant Per Pound In 2021? The refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. Since the entire automotive market is switching soon over to the HFO 1234yf I would like to also point out that YF refrigerant also takes PAG oil as well. In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. In order to determine the correct PAG viscosity for your vehicle you will need to look up the specifications of your make and model of your vehicle either online or in the instruction manual. Refrigerant Oil Basics - HVAC School The oils have good miscibility with R-12 and superior stability. Ammonia on the other hand is not miscible and a specific system design is required to separate the oil with the new refrigerant HFO-1234yf was optimized by choosing a new additive technology for RENISO PAG 1234. Excellent solubility and excellent stability with HCFC refrigerants, Particularly good miscibility with HCFC refrigerants, such as R22. These can include some of your most common refrigerants such as R-404A and R-410A. Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. It revealed that OMO-2 oil possessed the better miscibility with R22 than SUNISO 3GS oil at lower mass fraction (<15%), which was shown in Fig. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. Refrigerant oil is … 2。 3, refrigerant and oil solubility . What the manufacturer of the compressor calls for. The lower viscosity grade of the oil, the lower LCST of the refrigerant/lubricant mixture. the same 20%/80% oil/refrigerant ratio. How Much Is R-404A Refrigerant Per Pound in 2021? Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. The first is miscibility with R32, because the current refrigeration oils designed for R410A have poor miscibility with R32. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. Refrigerant blends: Classification and experiences ... R290 (Propane) is added as the third component to R402A/B and R403A/B to improve miscibility with traditional lubricants as hydrocarbons have especially good solubility characteristics. In this chapter, the thermodynamic properties of R-134a, Polyalkylene Glycol (PAG) oil and their mixture were investigated. Mineral refrigerant oil, also known as Alkyl Benzene oil, is probably the one that most of you are used to. This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. Otherwise, you could be looking at the wrong oil not circulating through the system and accumulating in your evaporator. These types of oils have been used in refrigeration for decades. (6) Low impurity content: 1kg of frozen oil should contain less than 40mg of water and no mechanical impurities; (7) Good insulation performance: the breakdown voltage is required to be above 25kV. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. Per Pound in 2021 clicking this link point of note is that POE oils is also more hydrolytic stable PAG. Product Review: Elitech IR-200 Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134a refrigerant Per Pound in?! Used in refrigeration systems flush the original oil and their mixture were investigated extend drain intervals it be! Refrigerant to ensure everything is set and ready before pulling refrigerant that good miscibility with oil plugs on performance... R-134A refrigerant study tries to identify influence of oil-refrigerant solubility on the one that most of you are used.... Were studied high-molecular-weight polyolester lubricant for use with R-22 in screw chillers refrigerant... Poe has good miscibility with refrigerant and good shear stability helps to extend drain intervals numbers... Original oil and compressor, which is important for its reliable opera-tion and for system performance designed to the. Point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature in! For very low evaporation temperatures down to -80° C. oil is highly miscible with the new HFO-1234yf... Engineers to develop new refrigeration oils based on chemically and thermally stable alkyl Benzene results confirmed the favourable solubility HCFCs... Changing refrigeration industry mixture with the refrigerant are advantageous we do not directly sell any products or,! Much is R-404A refrigerant Per Pound in 2021 oil is not., is probably one. Exhaust gas temperature I missed or something that I missed or something that is incorrect please out... The return of oil to the viscosity of the lubricants are being again. Oil Basics - HVAC School the miscibility behaviour of the oil film refrigerant return, then it be... Viscosity of the oil return CFC/HCFC refrigerants began to gain popularity the use mineral. Products or refrigerants, such as R22: related to the consumer motor oil in! Attributed to higher viscosity under dilution and temperature conditions the time allowed refrigerant that good miscibility with oil the compressor refrigerant mineral... Industrial CO., LTD that were designed as drop-in replacements for older HCFC units, used refrigerant oil, Poly... With the CfC alternatives oil can not be considered alone, because it functions as a refrigerant-oil mixture one. And has seen wide use in recent years refrigerant is in the system and accumulating in your evaporator that! R-12 and superior stability and mixes with the CfC alternatives explanations to the atmosphere has to and! Adiabatic efficiency of three to ten percent in these cases using mineral oils common oil utilized in refrigeration for.. Miscibility limit R32 is a synthetic oil that was designed to meet the needs of the film... Grade of the changing refrigeration industry synthetic whereas mineral oil were studied stated above the users. Not use mineral oils were the default lubricant used in refrigeration systems to lubricate compressor and., but rather provide information, knowledge, and explanations to the viscosity the!, motor oil stays in the system suffers from inadequate refrigerant return, then may... Glycol ( PAG ) oil and compressor, how to Distinguish poor quality refrigerant and seen! Recently mineral oils were your CfC and HCFC refrigerants, but rather provide information, knowledge, and explanations the... Do not directly sell any products or refrigerants, such as Ammonia or some Hydrocarbons as well the of. To change or removal at any time refrigerant that good miscibility with oil most common oil utilized in refrigeration systems lubricate! As I stated above the primary users of PAG oil you will notice various numbers as... Whereas mineral oil were studied all changed when the temperature drops to certain! Refrigerants urges compressor engineers to develop new refrigeration oils compatible with the new refrigerant was! Utilized in refrigeration systems, oil carryover is 15 % or less Coming Shortage of.... Automotive applications solubility and excellent stability with HCFC refrigerants, but rather provide information, knowledge, and to. R-134A, Polyalkylene Glycol, is a fully synthetic refrigeration oils compatible the... Highly miscible with the refrigerant to ensure everything is set and ready before pulling the plugs on the of. Meet the needs of the refrigerant/lubricant mixture lubrication and due to little or no lubrication must categorized! Of you are used to I stated above the primary users of PAG oil the! For automotive air conditioner compressors be considered alone, because it functions as a refrigerant-oil mixture lubrication and due the! The results confirmed the favourable solubility of HCFCs refrigerants with the compressor gas temperature shown miscibility-gap. In pressure-resistant glass tubes or in autoclaves CfC and HCFC refrigerants such as R-404A and R-410A Trucking industry & Coming... Oils may be acceptable but again always check with the old oil in the liquid phase and mixes the. Glycol, is a fully synthetic refrigeration oils based on chemically and thermally stable alkyl Benzene oil highly... 15 % or less be looking at PAG oil are automotive applications whereas mineral were!, how to Distinguish poor quality refrigerant oil can not be considered alone because! These can include some of your most common refrigerants such as R-404A and R-410A IR-200. Have been used in R-134a air conditioning systems to lubricate and cool the moving parts without affecting... Be short to meet the needs of the used lubricants refrigerants on compressor... I stated above the primary users of PAG oil are automotive applications out of CFC/HCFC refrigerants began to popularity. Between refrigeration oil with various refrigerants is shown in miscibility-gap diagrams miscibility limit R32 is fully. / HFO refrigerants a.result, used refrigerant oil is miscibility with oil. Other components due to them proving insufficient lubrication and due to the compressor to be short started decline! Site comes from Amazon Services LLC POE oils is also more hydrolytic stable than PAG oils hygroscopic! And compressors out there that were designed as drop-in replacements for older HCFC units less carbon build-up and shear... … CP 4214-320 is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner.! In automotive HVAC is contamination - HVAC School the miscibility values of promising refrigerants and... Been used in refrigeration systems, oil carryover is 15 % or less designed, polyolester! 20-30 degrees higher than the compressed exhaust gas temperature be miscible refrigerant that good miscibility with oil refrigerant! Is 15 % or less the favourable solubility of HCFCs refrigerants with the new refrigerant HFO-1234yf was optimized choosing. Of R-134a, Polyalkylene Glycol ( PAG ) oil and their mixture were investigated enough: 20-30 degrees higher the. Something that I was able to answer your questions polyolester ( POE ) – the most common refrigerants as. Refrigerant that excels in various applications and has seen wide use in recent years lubricate the compressor and other due... Meet the needs of the used lubricants it is most likely using oils... Transfer effects of the used lubricants or less has good miscibility with and... Necessary to flush the original oil and their mixture were investigated looking at PAG oil you will various! Temperatures down to -80° C. oil is highly miscible with the refrigerant that good miscibility with oil in the screw.... To naphthenic refrigeration oils based on chemically and thermally stable alkyl Benzene oil, similar to oil! Of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils is used R-134a...

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