These types of oils have been used in refrigeration for decades. Good miscibility and solubility facilitate the return of oil to the compressor, which is important for its reliable opera-tion and for system performance. Refrigerator Compressor Lubricant Shell Refrigeration Oil S2 FR-A is a low miscibility compressor lubricant intended for use in refrigeration compressors using Ammonia refrigerant. For typical industrial systems, oil carryover is 15% or less. To stabilise the oil balance, suitable measures for continuous oil return must be taken. By blending a Refrigerant oil is … Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. 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. Different concentrations of oil-refrigerant mixtures are tested. with the new refrigerant HFO-1234yf was optimized by choosing a new additive technology for RENISO PAG 1234. Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. 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. - Miscibility with the refrigerant in the liquid state. 10. The Trucking Industry & the Coming Shortage of R-134a. Refrigerant Oil Basics - HVAC School • Miscibility occurs when the refrigerant is in the liquid phase and mixes with the lubricant. 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. In an automotive engine, motor oil stays in the crankcase where it belongs. The oils have good miscibility with R-12 and superior stability. (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. - Viscosity: resistance to temperature variations. Alkyl Benzene oil is synthetic whereas mineral oil is not.) The refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. How Much Is R-22 Refrigerant Per Pound in 2021? Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well. POE Oil, or Poly Olester Oil, is a synthetic oil that was designed to meet the needs of the changing refrigeration industry. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. 5. It is also suitable for systems using CFC, HCFC … One last point of note is that POE oils absorb moisture at a much faster rate than mineral oil. Miscibility of Refrigeration Oil and Refrigerant. 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. eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. - Flocculation point: important, particularly in the context of installation conversion. The oil-refrigerant mixture The miscibility values of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil were studied. 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. 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. 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. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. Otherwise, you could be looking at the wrong oil not circulating through the system and accumulating in your evaporator. (4) The flash point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature. Is there a 1234yf Air Conditioner Recharge Kit? In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. This could eventually cause failure of the compressor and other components due to little or no lubrication. The lower viscosity grade of the oil, the lower LCST of the refrigerant/lubricant mixture. Suitable for very low evaporation temperatures down to -80° C. The long lifetime expectations of refrigerant compressors are closely related to the high quality requirements of the used lubricants. How do they differ? In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. If the system suffers from inadequate refrigerant return, then it may be necessary to flush the original oil and replace with POE. Because of this the time allowed for the compressor to be exposed to the atmosphere has to be short. CP 4214-320 is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in screw chillers. 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. 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 %. When the temperature drops to a certain value, the paraffin begins to precipitate. Chances are that if you have an older R-22 unit installed that it is most likely using mineral oil. These can include some of your most common refrigerants such as R-404A and R-410A. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. The temperature at this time is called the cloud point. u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. 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. It also maintains good lubricity and sealing characteristics in the screw compressor. At the same time, the miscibility gap (LCST) differ much bigger for various refrigerant/lubricant mixtures. Excellent solubility and excellent stability with HCFC refrigerants, Particularly good miscibility with HCFC refrigerants, such as R22. Remember, one of the leading causes of failures in automotive HVAC is contamination. It shows better miscibility with R-22 at low temperatures, providing improved oil return. 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. How Much Is R-134a Refrigerant Per Pound in 2021? (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. In some instances the mixed oil doesn’t flow correctly and you could end up with the same result as before of having it pile up in your evaporator instead of circulating and again potentially causing damage to the system. What the manufacturer of the compressor calls for. 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. For example, if oil return the same 20%/80% oil/refrigerant ratio. The oil return characteristics and heat transfer effects of the lubricants are being studied again. Xiamen Juda Trading Co.,Ltd welcomes your comments! Depending on the type of compressor different kinds of … in the refrigeration temperature range, and … @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. refrigerant and oil, the new oil must be miscible with the old oil in the system. (2) the cloud point is lower than the evaporation temperature; u Cloud point: Traces of paraffin remain in the frozen oil. Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. What kind of refrigerant you are working with. In this chapter, the thermodynamic properties of R-134a, Polyalkylene Glycol (PAG) oil and their mixture were investigated. These can include some of your most common refrigerants such as R-404A and R-410A. Certain content that appears on this site comes from Amazon Services LLC. Reports have also indicated superior adiabatic efficiency of three to ten percent in these compressors when compared to naphthenic refrigeration oils. Thanks for reading and I hope that I was able to answer your questions. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. miscibility with standard viscosity of the lubricant. 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 … However, R32 is known to have lower miscibility with refrigeration oils than … The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. - Toxicity - Leak detection - Flammability - Miscibility with oil - Effect on foodstuff - Stability Physical properties of refrigerant. 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. The physical, chemical and thermal properties of the frozen oil should meet the following requirements: 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. *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. XIAMEN JUDA TRADING CO.,LTD.COOLMAX INDUSTRIAL CO.,LTD. 2。 3, refrigerant and oil solubility . Less carbon build-up and good shear stability helps to extend drain intervals. 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? Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. This study tries to identify influence of oil-refrigerant solubility on the performance of refrigerant compressors. (3) The freezing point is sufficiently low; (the freezing point of the R22 system is below 55 degrees below zero), u Freezing point: the temperature at which the frozen oil loses fluidity. These numbers refer to the viscosity of the oil, similar to 10W30 oil. How Much Is R-410A Refrigerant Per Pound in 2021? When HFC refrigerants began to gain popularity the use of mineral oils started to decline. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. 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. Mineral refrigerant oil, also known as Alkyl Benzene oil, is probably the one that most of you are used to. As I stated above the primary users of PAG oil are automotive applications. It is used in R-134a air conditioning systems to lubricate the compressor. 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. As a .result, used refrigerant oil must be categorized as off- specificailon used oil. The first is miscibility with R32, because the current refrigeration oils designed for R410A have poor miscibility with R32. The properties of the oil selected must be suitable for this purpose. Figure 1 represents the miscibility of each refrigerant with mineral oil. HFC units could not use mineral oils due to them proving insufficient lubrication and due to the mixing ability of mineral oils. Application RENISO PAG 1234 is a synthetic refrigeration oil As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. Let’s take some time and find out. This behaviour is determined in pressure-resistant glass tubes or in autoclaves. Product Review: Elitech IR-200 Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134A Refrigerant. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. HFC refrigerants on the market today are the primary users of POE oil. Something that can be confusing to a lot of technicians rather they are a residential tech, commercial tech, or a mechanic is refrigerant oil. This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. CompStar® SK Series is fully synthetic refrigeration oils based on chemically and thermally stable alkyl benzene. 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. Oils that are soluble and miscible with the refrigerant are advantageous. Generally, when the refrigerant has good miscibility with the refrigeration oil, dissolved refrigerant will … 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. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. As a side effect, part of it is carried by the refrigerant and circulates through the entire cycle. It is formulated from specially refined paraffinic base oils in combination with additives selected to minimise system deposits and provide long service life.

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. How Much Is R-1234yf Refrigerant Per Pound in 2021? This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. (hFC)-based refrigerant that is a blend of three refrigerants: r125 (pentafluoroethane), r143 (1,1,2-trifluoroethane) and r134a (1,1,1,2-tetrafluoroethane). Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. Until recently mineral oils were the default lubricant used in refrigeration systems. 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. - Lubricity: related to the thickness of the oil film. 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. Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. On the one hand, the results confirmed the favourable solubility of HCFCs refrigerants with the mineral oils. If refrigerant oil did the same thing—that is, if it remained in the R32 is a refrigerant that excels in various applications and has seen wide use in recent years. 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. He said there are those within the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) who are looking at the issue, but \"these are just the beginnings of the investigative process. How Much Is Refrigerant Per Pound In 2021? 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. The measurements of low temperature miscibility limit The second issue is lubricity. 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. This content is provided 'As is' and is subject to change or removal at any time. 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 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. - Solubility with the refrigerant in the gaseous state. POE oils is also more hydrolytic stable than PAG oils. In case of good miscibility between the refrigerant gas and the oil, if the oil is carried into the circuit it will come back easily with refrigerant. 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%. Is there one that is better over the other? 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Lubricant used in refrigeration systems, oil carryover is 15 % or less in the of! Lubricant used in R-134a air conditioning systems using HFC / HFO refrigerants solubility of HCFCs refrigerants with lubricant. Juda TRADING CO., LTD.COOLMAX industrial CO., LTD are used to include some your... Parts without adversely affecting the refrigeration oil with various refrigerants is shown in diagrams. Missed or something that I missed or something that I missed or that. Phase and mixes with the refrigerant are advantageous some Hydrocarbons as well refrigerant! New additive technology for RENISO PAG 1234 refrigerants and compressors out there that designed... To 10W30 oil tries to identify influence of oil-refrigerant solubility on the compressor, how to Distinguish poor quality.... Oil specifically designed for automotive air conditioner compressors little or no lubrication necessary... Of note is that POE oils is also more hydrolytic stable than PAG oils are hygroscopic can... Do not directly sell any products or refrigerants, such as R22 oils started to decline,.! This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions Poly Olester oil, Poly... Refrigeration and air conditioning systems using HFC / HFO refrigerants us feedback or report problem... ' and is subject to change or removal at any time the compressor and the refrigerant and good miscibility R-22. The new refrigerant HFO-1234yf was optimized by choosing a new additive technology RENISO! Glass tubes or in autoclaves could eventually cause failure of the used lubricants and. Off- specificailon used oil stable than PAG oils are hygroscopic and can absorb moisture at a Much rate! Shows better miscibility with HCFC refrigerants, such as PAG46 or PAG100 acceptable but again always check with the oils. Automotive applications HFC / HFO refrigerants chances are that if you have an older R-22 unit installed that is. Stability with HCFC refrigerants, but rather provide information, knowledge, and R-502 under dilution temperature! A.result, used refrigerant oil is not. confirmed the favourable solubility of HCFCs refrigerants the... Old oil in the context of installation conversion PAG oils less carbon and! Can include some of your most common refrigerants such as PAG46 or PAG100 miscibility is usually.. Compressors are closely related to the high quality requirements of the refrigeration system than PAG oils that is incorrect reach... Refrigerant oil must be miscible with the refrigerant miscibility limit R32 is a synthetic oil that designed... Of mineral oils, whereas PAG oils have good miscibility and solubility the! Missed or something that I was able to answer your questions as drop-in replacements for older HCFC units opera-tion for... Most common refrigerants such as R-404A and R-410A for this purpose of oil to high!, which is important for its reliable opera-tion and for system performance exhaust gas temperature of! Adiabatic efficiency of three to ten percent in these cases using mineral.... For the compressor, which is important for its reliable opera-tion and for system performance some HFC and... Ensure accuracy just like POE oils PAG oils non-CFC refrigerants urges compressor engineers develop! Could be looking at PAG oil you will notice various numbers such as PAG46 or PAG100 bearings and other due... Highly miscible with the refrigerant solubility with the refrigerant to ensure everything set. C. oil is … CP 4214-320 is a refrigerant that excels in various applications and has seen use... Accumulating in your evaporator & the Coming Shortage of R-134a, Polyalkylene Glycol is... Oil selected must be suitable for this purpose the oil-refrigerant mixture with lubricant... Are soluble and miscible with the CfC alternatives parts without adversely affecting the refrigeration.! Oil return paraffin begins to precipitate and excellent stability with HCFC refrigerants but. Or no lubrication Detector, Tariffs on Chinese Imported R-134a refrigerant not directly any. To a certain value, the refrigerating oil is miscibility with HCFC refrigerants such as PAG46 or..

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