• Miscibility occurs when the refrigerant is in the liquid phase and mixes with the lubricant. HFC refrigerants on the market today are the primary users of POE oil. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. Is there a 1234yf Air Conditioner Recharge Kit? 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. 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 refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. 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. One last point of note is that POE oils absorb moisture at a much faster rate than mineral oil. Xiamen Juda Trading Co.,Ltd welcomes your comments! 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 %. As always if you see something that I missed or something that is incorrect please reach out to me by clicking this link. How Much Is R-22 Refrigerant Per Pound in 2021? with the new refrigerant HFO-1234yf was optimized by choosing a new additive technology for RENISO PAG 1234. These types of oils have been used in refrigeration for decades. What the manufacturer of the compressor calls for. The Trucking Industry & the Coming Shortage of R-134a. 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 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. Refrigerants that commonly used mineral oils were your CFC and HCFC refrigerants such as R-12, R-22, and R-502. *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. Otherwise, you could be looking at the wrong oil not circulating through the system and accumulating in your evaporator. 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. Thanks for reading and I hope that I was able to answer your questions. On the one hand, the results confirmed the favourable solubility of HCFCs refrigerants with the mineral oils. Suitable for very low evaporation temperatures down to -80° C. - Solubility with the refrigerant in the gaseous state. The lower viscosity grade of the oil, the lower LCST of the refrigerant/lubricant mixture. The first is miscibility with R32, because the current refrigeration oils designed for R410A have poor miscibility with R32. The measurements of low temperature miscibility limit At the same time, the miscibility gap (LCST) differ much bigger for various refrigerant/lubricant mixtures. 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? R32 is a refrigerant that excels in various applications and has seen wide use in recent years. 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. Lastly, just like POE oils PAG oils are hygroscopic and can absorb moisture at a much faster rate than mineral oil. u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. How do they differ? These can include some of your most common refrigerants such as R-404A and R-410A. 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. Different concentrations of oil-refrigerant mixtures are tested. - Miscibility with the refrigerant in the liquid state. CompStar® SK Series is fully synthetic refrigeration oils based on chemically and thermally stable alkyl benzene. 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. This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. However, R32 is known to have lower miscibility with refrigeration oils than … The oils have good miscibility with R-12 and superior stability. In an automotive engine, motor oil stays in the crankcase where it belongs. 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. eval(ez_write_tag([[300,600],'refrigeranthq_com-large-leaderboard-1','ezslot_2',112,'0','0']));report this ad. 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. @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. 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. The second issue is lubricity. These numbers refer to the viscosity of the oil, similar to 10W30 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. For example, if oil return It also maintains good lubricity and sealing characteristics in the screw compressor. This behaviour is determined in pressure-resistant glass tubes or in autoclaves. 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. As I stated above the primary users of PAG oil are automotive applications. POE Oil, or Poly Olester Oil, is a synthetic oil that was designed to meet the needs of the changing refrigeration industry. The properties of the oil selected must be suitable for this purpose. As a .result, used refrigerant oil must be categorized as off- specificailon used oil. Remember, one of the leading causes of failures in automotive HVAC is contamination. 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%. Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. In these cases using mineral oils may be acceptable but again always check with the compressor and the refrigerant to ensure accuracy. Mineral oils can also be used with other refrigerants such as Ammonia or some Hydrocarbons as well. Is there one that is better over the other? If the system suffers from inadequate refrigerant return, then it may be necessary to flush the original oil and replace with POE. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. Generally, when the refrigerant has good miscibility with the refrigeration oil, dissolved refrigerant will … Ammonia on the other hand is not miscible and a specific system design is required to separate the oil - Viscosity: resistance to temperature variations. - Lubricity: related to the thickness of the oil film. Refrigerant oil is … This all changed when the phase out of CFC/HCFC refrigerants began in the 1990’s and 2000’s. The oil-refrigerant mixture How Much Is R-404A Refrigerant Per Pound in 2021? 5. - Toxicity - Leak detection - Flammability - Miscibility with oil - Effect on foodstuff - Stability Physical properties of refrigerant. One of the most important characteristics of the oil is miscibility with refrigerant and good miscibility is usually acceptable. It is used in R-134a air conditioning systems to lubricate the compressor. Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. For typical industrial systems, oil carryover is 15% or less. 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. 10. Alkyl Benzene oil is synthetic whereas mineral oil is not.) Less carbon build-up and good shear stability helps to extend drain intervals. Until recently mineral oils were the default lubricant used in refrigeration systems. Figure 1 represents the miscibility of each refrigerant with mineral oil. Refrigerant Oil Basics - HVAC School The long lifetime expectations of refrigerant compressors are closely related to the high quality requirements of the used lubricants. CP 4214-320 is a specially designed, high-molecular-weight polyolester lubricant for use with R-22 in screw chillers. Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. How Much Is R-134a Refrigerant Per Pound in 2021? The temperature at this time is called the cloud point. 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. 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. 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 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. Mineral refrigerant oil, also known as Alkyl Benzene oil, is probably the one that most of you are used to. 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 - Flocculation point: important, particularly in the context of installation conversion. 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 has to be short. refrigerant and oil, the new oil must be miscible with the old oil in the system. How Much Is R-410A Refrigerant Per Pound in 2021? Miscibility of Refrigeration Oil and Refrigerant. 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. We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. 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. (4) The flash point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature. Please fill this form to give us feedback or report any problem when experiencing our website. If refrigerant oil did the same thing—that is, if it remained in the This could eventually cause failure of the compressor and other components due to little or no lubrication. Application RENISO PAG 1234 is a synthetic refrigeration oil In some instances there are some HFC refrigerants and compressors out there that were designed as drop-in replacements for older HCFC units. (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. 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. Best practice is to ensure everything is set and ready before pulling the plugs on 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. Excellent solubility and excellent stability with HCFC refrigerants, Particularly good miscibility with HCFC refrigerants, such as R22. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. By blending a synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. How Much Is R-1234yf Refrigerant Per Pound in 2021? It is also suitable for systems using CFC, HCFC … POE has good miscibility with mineral oils, whereas PAG oils have poor miscibility. Certain content that appears on this site comes from Amazon Services LLC. 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. POE oils is also more hydrolytic stable than PAG oils. To stabilise the oil balance, suitable measures for continuous oil return must be taken. 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. Something that can be confusing to a lot of technicians rather they are a residential tech, commercial tech, or a mechanic is refrigerant oil. When HFC refrigerants began to gain popularity the use of mineral oils started to decline. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. The miscibility values of promising refrigerants RE170 and mixed refrigerant RE170/R227ea with a mineral oil were studied. (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 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. 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. 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. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. 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. 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. The oil return characteristics and heat transfer effects of the lubricants are being studied again. 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