The R-1234yf is much more reactive than R-134a. On the positive side, this higher reactivity is why R-1234yf is so much more friendly to the environment. It tends to react with other gases in the atmosphere and break down within a couple of weeks, as compared to R-134a, which remains stable for over a decade.
Still, the answer is an emphatic, “No.” Not only would a retrofit of this type negate the environmental benefits of R-1234yf, but it would also be a violation of Federal Law under Section 203 of the Clean Air Act: “tampering” with a vehicle's emissions control device.
The first place to look for this information is under the hood. Pop the hood and look for a label, which is usually white or bright yellow. On this it will either say “R-134a” or “R-1234yf,” and it may even say what the capacity is. However, not all cars have this label.
R-134a and R-1234yf systems have unique fittings so they can only be used with the appropriate corresponding refrigerants and equipment. R-1234yf is very expensive. This has led to end-users trying to replace the refrigerant in vehicles originally containing R-1234yf with R-134a, in an attempt to save money.
In this case, the correct identification for R-1234yf refrigerant is: b) Pink with a white stripe Refrigerant cylinders are color-coded to easily distinguish between different types of refrigerants. R-1234yf refrigerant is typically contained in cylinders that are pink with a white stripe.
R-134a cylinders are colored light blue. A phaseout and transition to HFO-1234yf and other refrigerants, with GWPs similar to CO2, began in 2012 within the automotive market.
You can convert an empty R-1234yf system to R-134a. Mercedes made this obvious when it raised objections to R-1234yf over 11⁄2 years ago and recalled European models with the refrigerant, recovered it from the vehicles' systems and recharged them with R-134a.
Most vehicles have a label or sticker under the hood that indicate whether the refrigerant used is R-134a or R-1234yf.
The cooling capacity of R1234yf used as a drop-in replacement in a R134a refrigerant facility is about 9% lower than that presented by R134a in the test range. This difference in the values of cooling capacity obtained with both refrigerants decreases when the condensing temperature increases and when an IHX is used.
HFO-1234yf (R-1234yf ) has a global warming impact value of 1 versus 1300 for R-134a. It breaks down chemically in the atmosphere in only 11 days versus 13 years for R-134a! While R-1234yf oils are backwards compatible with R-134a systems, R-134a PAG oils are not compatible with R-1234yf systems.
One way you can tell which refrigerant your air conditioner needs is by checking the large sticker or plate on its compressor or evaporator, which will state the refrigerant that's required.
2 (a) shows that the variation of the pressure-volume diagram is very similar when using R1234yf and R134a, with, R134a shows a higher final discharge pressure, with the difference in the indicated work for compressor when using both fluids to be less than 2%, as shown in Fig.
Refrigerant types are not to be mixed. The usage of dyes and sealants is discouraged.
Switching to R1234yf refrigerant is a step towards a greener future, but it comes with higher costs due to advanced equipment, stringent regulations, and specialized training.
As standard, all MAHLE ArcticPRO® air conditioning service units have an inte- grated flushing function that allows fast, low-cost flushing of the air conditioning system with the refrigerants R134a or R1234yf. An external flushing unit and parts from a flushing kit will be required— both are available separately.
Vehicles with R-1234yf have different service fittings than R-134a vehicles to prevent cross-contamination with different refrigerants. Also, it's illegal to put R-134a or any other refrigerant into a car originally equipped with R-1234yf.
Why Is R-134A Being Phased Out? When Is the Phaseout Expected to Conclude? Like a lot of '90s relics, R-134A has not aged well. It was known then that 1,1,1,2-tetrafluoroethane could potentially contribute to acid rain and that its ozone layer depletion potential was high.
General Motors began introducing vehicles to the market utilizing this new system in 2013 with full conversion in 2018. Chrysler, Honda, and Subaru models followed in 2017. It is anticipated that by 2025 all vehicles will contain 1234YF.
The results of this study have shown that the cooling capacity of R1234yf AAC system is significantly lower (between 5 to 25 %) than R134a system.
Firstly, the primary difference is the environmental impact. Old refrigerants like R-12 and R-134a are known to contribute to ozone depletion and global warming. In contrast, 1234YF is classified as a has a much lower global warming potential. Secondly, the performance of the refrigerants is different.
Most cars hold between 28 and 32 ounces of refrigerant (or about 2—3 12oz cans), however larger vehicles and those with rear A/C will likely hold more. Check your vehicle manual for the system capacity for your specific vehicle.
In with the new
The new refrigerant type uses ND-oil 12, also a PAG 46 oil but with additives specifically for the R1234yf type refrigerant.