Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. How do they differ? Suitable for very low evaporation temperatures down to -80° C. HFC units could not use mineral oils due to them proving insufficient lubrication and due to the mixing ability of mineral oils. Refrigerator Compressor Lubricant Shell Refrigeration Oil S2 FR-A is a low miscibility compressor lubricant intended for use in refrigeration compressors using Ammonia refrigerant. 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. However, R32 is known to have lower miscibility with refrigeration oils than … When HFC refrigerants began to gain popularity the use of mineral oils started to decline. XIAMEN JUDA TRADING CO.,LTD.COOLMAX INDUSTRIAL CO.,LTD. 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. 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. u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. (2) the cloud point is lower than the evaporation temperature; u Cloud point: Traces of paraffin remain in the frozen oil. This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. Figure 1 represents the miscibility of each refrigerant with mineral oil. 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. POE Oil, or Poly Olester Oil, is a synthetic oil that was designed to meet the needs of the changing refrigeration industry. It also maintains good lubricity and sealing characteristics in the screw compressor. For example, if oil return If refrigerant oil did the same thing—that is, if it remained in the What the manufacturer of the compressor calls for. 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. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. (4) The flash point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature. To stabilise the oil balance, suitable measures for continuous oil return must be taken. - Miscibility with the refrigerant in the liquid state. 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. Something that can be confusing to a lot of technicians rather they are a residential tech, commercial tech, or a mechanic is refrigerant oil. Refrigerant oil is … 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. Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. This could eventually cause failure of the compressor and other components due to little or no lubrication. Depending on the type of compressor different kinds of … The Trucking Industry & the Coming Shortage of R-134a. It is formulated from specially refined paraffinic base oils in combination with additives selected to minimise system deposits and provide long service life.

Thanks for reading and I hope that I was able to answer your questions. Remember, one of the leading causes of failures in automotive HVAC is contamination. refrigerant and oil, the new oil must be miscible with the old oil in the system. 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 refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. 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. 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. Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. Chances are that if you have an older R-22 unit installed that it is most likely using mineral oil. eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. Please fill this form to give us feedback or report any problem when experiencing our website. Application RENISO PAG 1234 is a synthetic refrigeration oil the same 20%/80% oil/refrigerant ratio. 2。 3, refrigerant and oil solubility . As a side effect, part of it is carried by the refrigerant and circulates through the entire cycle. Alkyl Benzene oil is synthetic whereas mineral oil is not.) @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. Different concentrations of oil-refrigerant mixtures are tested. The properties of the oil selected must be suitable for this purpose. By blending a Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. Generally, when the refrigerant has good miscibility with the refrigeration oil, dissolved refrigerant will … *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. In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. (hFC)-based refrigerant that is a blend of three refrigerants: r125 (pentafluoroethane), r143 (1,1,2-trifluoroethane) and r134a (1,1,1,2-tetrafluoroethane). In these cases using mineral oils may be acceptable but again always check with the compressor and the refrigerant to ensure accuracy. Less carbon build-up and good shear stability helps to extend drain intervals. Product Review: Elitech IR-200 Dual Sensor Leak Detector, Tariffs on Chinese Imported R-134A Refrigerant. POE oils is also more hydrolytic stable than PAG oils. Excellent solubility and excellent stability with HCFC refrigerants, Particularly good miscibility with HCFC refrigerants, such as R22. CompStar® SK Series is fully synthetic refrigeration oils based on chemically and thermally stable alkyl benzene. The second issue is lubricity. Until recently mineral oils were the default lubricant used in refrigeration systems. 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. Otherwise, you could be looking at the wrong oil not circulating through the system and accumulating in your evaporator. with the new refrigerant HFO-1234yf was optimized by choosing a new additive technology for RENISO PAG 1234. It is used in R-134a air conditioning systems to lubricate the compressor. Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. 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. Refrigerant Oil Basics - HVAC School 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? - Flocculation point: important, particularly in the context of installation conversion. This study tries to identify influence of oil-refrigerant solubility on the performance of refrigerant compressors. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. Ammonia on the other hand is not miscible and a specific system design is required to separate the oil in the refrigeration temperature range, and … The physical, chemical and thermal properties of the frozen oil should meet the following requirements: If the system suffers from inadequate refrigerant return, then it may be necessary to flush the original oil and replace with POE. We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. It is also suitable for systems using CFC, HCFC … Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well. Good miscibility and solubility facilitate the return of oil to the compressor, which is important for its reliable opera-tion and for system performance. R32 is a refrigerant that excels in various applications and has seen wide use in recent years. CP 4214-320 is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in screw chillers. 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. Xiamen Juda Trading Co.,Ltd welcomes your comments! In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. These can include some of your most common refrigerants such as R-404A and R-410A. When the temperature drops to a certain value, the paraffin begins to precipitate. 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 behaviour is determined in pressure-resistant glass tubes or in autoclaves. How Much Is R-1234yf Refrigerant Per Pound in 2021? The lower viscosity grade of the oil, the lower LCST of the refrigerant/lubricant mixture. How Much Is R-134a Refrigerant Per Pound in 2021? 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 Certain content that appears on this site comes from Amazon Services LLC. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. - Viscosity: resistance to temperature variations. On the one hand, the results confirmed the favourable solubility of HCFCs refrigerants with the mineral oils. HFC refrigerants on the market today are the primary users of POE oil. - Solubility with the refrigerant in the gaseous state. - Lubricity: related to the thickness of the oil film. Oils that are soluble and miscible with the refrigerant are advantageous. The oils have good miscibility with R-12 and superior stability. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. 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. The oil-refrigerant mixture - Toxicity - Leak detection - Flammability - Miscibility with oil - Effect on foodstuff - Stability Physical properties of refrigerant. 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. 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. 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. Best practice is to ensure everything is set and ready before pulling the plugs on the compressor. As a .result, used refrigerant oil must be categorized as off- specificailon used oil. 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. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. How Much Is R-410A Refrigerant Per Pound in 2021? 5. 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 occurs when the refrigerant is in the liquid phase and mixes with the lubricant. What kind of refrigerant you are working with. POE has good miscibility with mineral oils, whereas PAG oils have poor miscibility. One of the most important characteristics of the oil is miscibility with refrigerant and good miscibility is usually acceptable. 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