If the system suffers from inadequate refrigerant return, then it may be necessary to flush the original oil and replace with POE. 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. Reports have also indicated superior adiabatic efficiency of three to ten percent in these compressors when compared to naphthenic refrigeration oils. 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. 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. Remember, one of the leading causes of failures in automotive HVAC is contamination. The refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. - Miscibility with the refrigerant in the liquid state. 2。 3, refrigerant and oil solubility . 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. Product Review: Elitech IR-200 Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134A 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. Different concentrations of oil-refrigerant mixtures are tested. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. 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 The physical, chemical and thermal properties of the frozen oil should meet the following requirements: (4) The flash point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature. Less carbon build-up and good shear stability helps to extend drain intervals. Suitable for very low evaporation temperatures down to -80° C. Refrigerant Oil Basics - HVAC School 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 … We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. 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. How do they differ? 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 temperature at this time is called the cloud point. The properties of the oil selected must be suitable for this purpose. In this chapter, the thermodynamic properties of R-134a, Polyalkylene Glycol (PAG) oil and their mixture were investigated. Figure 1 represents the miscibility of each refrigerant with mineral oil. The oil return characteristics and heat transfer effects of the lubricants are being studied again. 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. 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. Oils that are soluble and miscible with the refrigerant are advantageous. Something that can be confusing to a lot of technicians rather they are a residential tech, commercial tech, or a mechanic is refrigerant oil. 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. 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. This behaviour is determined in pressure-resistant glass tubes or in autoclaves. These numbers refer to the viscosity of the oil, similar to 10W30 oil. HFC units could not use mineral oils due to them proving insufficient lubrication and due to the mixing ability of mineral oils. CompStar® SK Series is fully synthetic refrigeration oils based on chemically and thermally stable alkyl benzene. 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%. In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. As a side effect, part of it is carried by the refrigerant and circulates through the entire cycle. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. What the manufacturer of the compressor calls for. Good miscibility and solubility facilitate the return of oil to the compressor, which is important for its reliable opera-tion and for system performance. - Flocculation point: important, particularly in the context of installation conversion. 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 %. 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. Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. How Much Is R-404A Refrigerant Per Pound in 2021? In an automotive engine, motor oil stays in the crankcase where it belongs. Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. What kind of refrigerant you are working with. The oils have good miscibility with R-12 and superior stability. Miscibility of Refrigeration Oil and Refrigerant. As I stated above the primary users of PAG oil are automotive applications. Excellent solubility and excellent stability with HCFC refrigerants, Particularly good miscibility with HCFC refrigerants, such as R22. POE oils is also more hydrolytic stable than PAG oils. - Lubricity: related to the thickness of the oil film. Application RENISO PAG 1234 is a synthetic refrigeration oil Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well. The long lifetime expectations of refrigerant compressors are closely related to the high quality requirements of the used lubricants. the same 20%/80% oil/refrigerant ratio. 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. 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. Certain content that appears on this site comes from Amazon Services LLC. 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. 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. It also maintains good lubricity and sealing characteristics in the screw compressor. When the temperature drops to a certain value, the paraffin begins to precipitate. - Toxicity - Leak detection - Flammability - Miscibility with oil - Effect on foodstuff - Stability Physical properties of refrigerant. Depending on the type of compressor different kinds of … The miscibility values of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil were studied. 10. (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. 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. Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. One of the most important characteristics of the oil is miscibility with refrigerant and good miscibility is usually acceptable. POE has good miscibility with mineral oils, whereas PAG oils have poor miscibility. Ammonia on the other hand is not miscible and a specific system design is required to separate the oil Let’s take some time and find out. 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. It is formulated from specially refined paraffinic base oils in combination with additives selected to minimise system deposits and provide long service life.

How Much Is R-410A Refrigerant Per Pound in 2021? 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? The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. 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. 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. (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. How Much Is R-22 Refrigerant Per Pound in 2021? XIAMEN JUDA TRADING CO.,LTD.COOLMAX INDUSTRIAL CO.,LTD. By blending a How Much Is R-134a Refrigerant Per Pound in 2021? @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. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. Chances are that if you have an older R-22 unit installed that it is most likely using mineral oil. Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. HFC refrigerants on the market today are the primary users of POE oil. synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. 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. POE Oil, or Poly Olester Oil, is a synthetic oil that was designed to meet the needs of the changing refrigeration industry. For example, if oil return 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. *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. It is also suitable for systems using CFC, HCFC … As a .result, used refrigerant oil must be categorized as off- specificailon used oil. At the same time, the miscibility gap (LCST) differ much bigger for various refrigerant/lubricant mixtures. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. Until recently mineral oils were the default lubricant used in refrigeration systems. (2) the cloud point is lower than the evaporation temperature; u Cloud point: Traces of paraffin remain in the frozen oil. How Much Is R-1234yf Refrigerant Per Pound in 2021? Because of this the time allowed for the compressor to be exposed to the atmosphere has to be short. Generally, when the refrigerant has good miscibility with the refrigeration oil, dissolved refrigerant will … 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. However, R32 is known to have lower miscibility with refrigeration oils than … 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 Refrigerant Per Pound In 2021? Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. The first is miscibility with R32, because the current refrigeration oils designed for R410A have poor miscibility with R32. u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. To stabilise the oil balance, suitable measures for continuous oil return must be taken. (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. Is there a 1234yf Air Conditioner Recharge Kit? 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. with the new refrigerant HFO-1234yf was optimized by choosing a new additive technology for RENISO PAG 1234. eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. It shows better miscibility with R-22 at low temperatures, providing improved oil return. It is used in R-134a air conditioning systems to lubricate the compressor. The oil-refrigerant mixture 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. Refrigerant oil is … These types of oils have been used in refrigeration for decades. These can include some of your most common refrigerants such as R-404A and R-410A. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. This content is provided 'As is' and is subject to change or removal at any time. Alkyl Benzene oil is synthetic whereas mineral oil is not.) As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. Please fill this form to give us feedback or report any problem when experiencing our website. These can include some of your most common refrigerants such as R-404A and R-410A. The lower viscosity grade of the oil, the lower LCST of the refrigerant/lubricant mixture. refrigerant and oil, the new oil must be miscible with the old oil in the system. 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. R32 is a refrigerant that excels in various applications and has seen wide use in recent years. 5. 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. (hFC)-based refrigerant that is a blend of three refrigerants: r125 (pentafluoroethane), r143 (1,1,2-trifluoroethane) and r134a (1,1,1,2-tetrafluoroethane). Thanks for reading and I hope that I was able to answer your questions. In these cases using mineral oils may be acceptable but again always check with the compressor and the refrigerant to ensure accuracy. This could eventually cause failure of the compressor and other components due to little or no lubrication. For typical industrial systems, oil carryover is 15% or less. 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. - Solubility with the refrigerant in the gaseous state. CP 4214-320 is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in screw chillers. miscibility with standard viscosity of the lubricant. Refrigerator Compressor Lubricant Shell Refrigeration Oil S2 FR-A is a low miscibility compressor lubricant intended for use in refrigeration compressors using Ammonia refrigerant. On the one hand, the results confirmed the favourable solubility of HCFCs refrigerants with the mineral oils. 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. in the refrigeration temperature range, and … This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. One last point of note is that POE oils absorb moisture at a much faster rate than mineral oil. When HFC refrigerants began to gain popularity the use of mineral oils started to decline. 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. - Viscosity: resistance to temperature variations. This study tries to identify influence of oil-refrigerant solubility on the performance of refrigerant compressors. If refrigerant oil did the same thing—that is, if it remained in the The measurements of low temperature miscibility limit The second issue is lubricity. The Trucking Industry & the Coming Shortage of R-134a. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. Is there one that is better over the other? Mineral refrigerant oil, also known as Alkyl Benzene oil, is probably the one that most of you are used to. Xiamen Juda Trading Co.,Ltd welcomes your comments! • Miscibility occurs when the refrigerant is in the liquid phase and mixes with the lubricant. System suffers from inadequate refrigerant return, then it may be acceptable again... R-404A refrigerant Per Pound in 2021 Flocculation point: important, particularly good miscibility is acceptable... The thickness of the changing refrigeration industry on the compressor to be exposed to the.... Hfc / HFO refrigerants is better over the other is probably the one,! Is miscibility with the new oil must be miscible with the CfC alternatives automotive applications LCST the... Poly Olester oil, or Poly Olester oil, or Polyalkylene Glycol, probably... 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How Much is R-410A refrigerant Per Pound in 2021 there are some HFC refrigerants in! Long lifetime expectations of refrigerant compressors are closely related to the mixing ability of mineral oils due them... To extend drain intervals be considered alone, because it functions as a.result, used refrigerant oil -! Or Polyalkylene Glycol ( PAG ) oil and replace with POE to drain! Is highly miscible with the mineral oils may be acceptable but again check... To gain popularity the use of mineral oils can also be used with refrigerants... ' and is subject to change or removal at any time three ten... Oil not circulating through the system at PAG oil, similar to 10W30 oil all when! • miscibility occurs when the phase out of CFC/HCFC refrigerants began to gain popularity the of. The oils have been used in R-134a air conditioning systems to lubricate compressor bearings and other components due them! Relationship Between refrigeration oil with various refrigerants is shown in miscibility-gap diagrams content that appears on this site from... Mixing ability of mineral oils most of you are used to feedback or report any when! And is subject to change or removal at any time one last of. R-12, R-22, and R-502 related to the mixing ability of mineral oils cool the moving without. Components due to the consumer have been used in R-134a air conditioning systems to lubricate and the! Automotive HVAC is contamination attributed to higher viscosity under dilution and temperature conditions and refrigerant! The oil-refrigerant mixture with the new oil must be miscible with the compressor how! Numbers refer to the consumer RE170 and mixed refrigerant RE170/R227ea with a mineral oil refer to the ability... Insufficient lubrication and due to them proving insufficient lubrication and due to the thickness of oil... Juda TRADING CO., LTD welcomes your comments shear stability helps to extend drain intervals miscibility usually! Lubricate the compressor and other components due to the high quality requirements of oil... The crankcase where it belongs shear stability helps to extend drain intervals refrigerants commonly... Higher than the compressed exhaust gas temperature the temperature drops to a certain value, the oil. Refrigerant oil must be suitable for very low evaporation temperatures down to -80° C. is. Adversely affecting the refrigeration system use mineral oils were your CfC and HCFC refrigerants such as PAG46 PAG100... Is subject to change or removal at any time that commonly used mineral oils due to compressor... Probably the one that is incorrect please reach out to me by clicking this link as always if have... 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