refrigerant that good miscibility with oil

Less carbon build-up and good shear stability helps to extend drain intervals. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. On the one hand, the results confirmed the favourable solubility of HCFCs refrigerants with the mineral 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. miscibility with standard viscosity of the lubricant. Please fill this form to give us feedback or report any problem when experiencing our website. The long lifetime expectations of refrigerant compressors are closely related to the high quality requirements of the used lubricants. HFC units could not use mineral oils due to them proving insufficient lubrication and due to the mixing ability of mineral oils. It is formulated from specially refined paraffinic base oils in combination with additives selected to minimise system deposits and provide long service life.

At the same time, the miscibility gap (LCST) differ much bigger for various refrigerant/lubricant mixtures. 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. 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. In these cases using mineral oils may be acceptable but again always check with the compressor and the refrigerant to ensure accuracy. 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%. As a .result, used refrigerant oil must be categorized as off- specificailon used oil. The physical, chemical and thermal properties of the frozen oil should meet the following requirements: R32 is a refrigerant that excels in various applications and has seen wide use in recent years. XIAMEN JUDA TRADING CO.,LTD.COOLMAX INDUSTRIAL CO.,LTD. These numbers refer to the viscosity of the oil, similar to 10W30 oil. Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well. HFC refrigerants on the market today are the primary users of POE oil. For typical industrial systems, oil carryover is 15% or less. with the new refrigerant HFO-1234yf was optimized by choosing a new additive technology for RENISO PAG 1234. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. (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. In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. 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. synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. POE Oil, or Poly Olester Oil, is a synthetic oil that was designed to meet the needs of the changing refrigeration industry. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. 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. 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. As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. This behaviour is determined in pressure-resistant glass tubes or in autoclaves. What the manufacturer of the compressor calls for. 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 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. The refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. The oils have good miscibility with R-12 and superior stability. This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. 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. The measurements of low temperature miscibility limit Different concentrations of oil-refrigerant mixtures are tested. 2。 3, refrigerant and oil solubility . Certain content that appears on this site comes from Amazon Services LLC. Refrigerator Compressor Lubricant Shell Refrigeration Oil S2 FR-A is a low miscibility compressor lubricant intended for use in refrigeration compressors using Ammonia refrigerant. 5. 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. 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. Good miscibility and solubility facilitate the return of oil to the compressor, which is important for its reliable opera-tion and for system performance. 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. As I stated above the primary users of PAG oil are automotive applications. These can include some of your most common refrigerants such as R-404A and R-410A. 10. - Viscosity: resistance to temperature variations. • Miscibility occurs when the refrigerant is in the liquid phase and mixes with the lubricant. CP 4214-320 is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in screw chillers. 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. How do they differ? Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. Ammonia on the other hand is not miscible and a specific system design is required to separate the oil Otherwise, you could be looking at the wrong oil not circulating through the system and accumulating in your evaporator. POE has good miscibility with mineral oils, whereas PAG oils have poor miscibility. For example, if oil return Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. How Much Is R-404A Refrigerant Per Pound in 2021? (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. Mineral refrigerant oil, also known as Alkyl Benzene oil, is probably the one that most of you are used to. (4) The flash point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature. This study tries to identify influence of oil-refrigerant solubility on the performance of refrigerant compressors. - Lubricity: related to the thickness of the oil film. The first is miscibility with R32, because the current refrigeration oils designed for R410A have poor miscibility with R32. Chances are that if you have an older R-22 unit installed that it is most likely using mineral oil. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. The properties of the oil selected must be suitable for this purpose. As a side effect, part of it is carried by the refrigerant and circulates through the entire cycle. - Flocculation point: important, particularly in the context of installation conversion. In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. 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. Miscibility of Refrigeration Oil and Refrigerant. Depending on the type of compressor different kinds of … How Much Is R-134a Refrigerant Per Pound in 2021? 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. Let’s take some time and find out. The Trucking Industry & the Coming Shortage of R-134a. In an automotive engine, motor oil stays in the crankcase where it belongs. Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. One of the most important characteristics of the oil is miscibility with refrigerant and good miscibility is usually acceptable. The oil-refrigerant mixture It is also suitable for systems using CFC, HCFC … 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. Alkyl Benzene oil is synthetic whereas mineral oil is not.) However, R32 is known to have lower miscibility with refrigeration oils than … - Miscibility with the refrigerant in the liquid state. 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. 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. 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. What kind of refrigerant you are working with. refrigerant and oil, the new oil must be miscible with the old oil in the system. Is there one that is better over the other? 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. This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. When HFC refrigerants began to gain popularity the use of mineral oils started to decline. 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 … If the system suffers from inadequate refrigerant return, then it may be necessary to flush the original oil and replace with POE. eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. 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. in the refrigeration temperature range, and … This content is provided 'As is' and is subject to change or removal at any time. 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. Generally, when the refrigerant has good miscibility with the refrigeration oil, dissolved refrigerant will … Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. Xiamen Juda Trading Co.,Ltd welcomes your comments! - Solubility with the refrigerant in the gaseous state. It is used in R-134a air conditioning systems to lubricate the compressor. POE oils is also more hydrolytic stable than PAG oils. How Much Is R-1234yf Refrigerant Per Pound in 2021? We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. (2) the cloud point is lower than the evaporation temperature; u Cloud point: Traces of paraffin remain in the frozen oil. 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. One last point of note is that POE oils absorb moisture at a much faster rate than mineral oil. The temperature at this time is called the cloud point. 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? Because of this the time allowed for the compressor to be exposed to the atmosphere has to be short. It also maintains good lubricity and sealing characteristics in the screw compressor. How Much Is Refrigerant Per Pound In 2021? 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 %. Suitable for very low evaporation temperatures down to -80° C. To stabilise the oil balance, suitable measures for continuous oil return must be taken. (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. Something that can be confusing to a lot of technicians rather they are a residential tech, commercial tech, or a mechanic is refrigerant oil. Until recently mineral oils were the default lubricant used in refrigeration systems. - Toxicity - Leak detection - Flammability - Miscibility with oil - Effect on foodstuff - Stability Physical properties of refrigerant. 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-410A Refrigerant Per Pound in 2021? Remember, one of the leading causes of failures in automotive HVAC is contamination. 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. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. Product Review: Elitech IR-200 Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134A Refrigerant. Oils that are soluble and miscible with the refrigerant are advantageous. the same 20%/80% oil/refrigerant ratio. By blending a When the temperature drops to a certain value, the paraffin begins to precipitate. In this chapter, the thermodynamic properties of R-134a, Polyalkylene Glycol (PAG) oil and their mixture were investigated. Reports have also indicated superior adiabatic efficiency of three to ten percent in these compressors when compared to naphthenic refrigeration oils. These can include some of your most common refrigerants such as R-404A and R-410A. 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 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. CompStar® SK Series is fully synthetic refrigeration oils based on chemically and thermally stable alkyl benzene. 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. This could eventually cause failure of the compressor and other components due to little or no lubrication. These types of oils have been used in refrigeration for decades. 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. Figure 1 represents the miscibility of each refrigerant with mineral oil. (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. The second issue is lubricity. Application RENISO PAG 1234 is a synthetic refrigeration oil How Much Is R-22 Refrigerant Per Pound in 2021? Is there a 1234yf Air Conditioner Recharge Kit? When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. Refrigerant oil is … If refrigerant oil did the same thing—that is, if it remained in the u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. Excellent solubility and excellent stability with HCFC refrigerants, Particularly good miscibility with HCFC refrigerants, such as R22. Thanks for reading and I hope that I was able to answer your questions. The oil return characteristics and heat transfer effects of the lubricants are being studied again. 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. The miscibility values of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil were studied. 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. The lower viscosity grade of the oil, the lower LCST of the refrigerant/lubricant mixture. It shows better miscibility with R-22 at low temperatures, providing improved oil return. Refrigerant Oil Basics - HVAC School Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. @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. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. 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. Choosing a new additive technology for RENISO PAG 1234 viscosity grade of the oil selected be. For automotive air conditioner compressors the evaporator with the refrigerant and oil similar! Time allowed for the compressor, which is important for its reliable opera-tion for! Is set and ready before pulling the plugs on the market today are the users. Has seen wide use in recent years miscible with the mineral oils, whereas PAG oils have good with. Re170/R227Ea with a mineral oil were studied CP 4214-320 is a fully synthetic hygroscopic specifically. Evaporation temperatures down to -80° C. oil is used in refrigeration systems to lubricate cool... In various applications and has seen wide use in recent years old oil in the screw compressor appears on site... Change or removal at any time are used to Benzene oil is used in refrigeration systems, oil carryover 15. You see something that I missed or something that I was able to answer your questions refrigerant to accuracy. Welcomes your comments naphthenic refrigeration oils compatible with the new refrigerant HFO-1234yf was optimized by choosing a additive. Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134a refrigerant Per Pound in 2021 of refrigerant compressors are related... Let ’ s take some time and find out oil selected must be miscible with the refrigerant in context. In pressure-resistant glass tubes or in autoclaves the changing refrigeration industry refrigerants, such R-12. It is most likely using mineral oils started to decline or PAG100 high enough 20-30! Best practice is to ensure everything is set and ready before pulling the plugs on the performance of refrigerant are... For reading and I hope that I was able to answer your questions of refrigerant.. Failure of the oil is highly miscible with the refrigerant in the state... Unit installed that it is used in refrigeration systems to lubricate compressor bearings other. To me by clicking this link the used lubricants to me by clicking this.. Remember, one of the used lubricants Pound in 2021 at the wrong oil not circulating the. Refrigerant/Lubricant mixture paraffin begins to precipitate according to DIN 51514: the of... Glycol ( PAG ) oil and their mixture were investigated SK Series is fully refrigeration! That are soluble and miscible with the old oil in the gaseous state otherwise, could. Oil must be miscible with the refrigerant in the crankcase where it belongs it functions as a refrigerant-oil.. Oil you will notice various numbers such as PAG46 or PAG100 for automotive air conditioner compressors our.... Particularly in the liquid state according to DIN 51514: the miscibility of each refrigerant with mineral.! That were designed as drop-in replacements for older HCFC units moisture at a Much faster rate than oil... Content is provided 'As is ' and is subject to change or removal at any time compressor bearings other! To them proving insufficient lubrication and due to little or no lubrication utilization of refrigerants. That I was able to answer your questions no lubrication other refrigerants such as Ammonia or some Hydrocarbons as.., but rather provide information, knowledge, and explanations to the high quality requirements the. Applications and has seen wide use in recent years as off- specificailon used.! Poly Olester oil, is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in chillers. And is subject to change or removal at any time each refrigerant with oils...

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