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Automotive AC System Oil Migration HFO-1234yf Vs. R134a
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2011 by SAE International in United States
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As global automotive manufacturers prepare for the introduction of HFO-1234yf as the low Global Warming Potential (GWP) refrigerant solution in Europe and North America concerns over compressor durability due to oil migration still remain. This preliminary study evaluates several different variables that affect oil migration. Several compressor suppliers each having their own unique oil formulation for HFO-1234yf were included. Comparisons between vehicle tests and various accelerated lab test methods are made. In R134a automotive system the thresholds that cause compressor warranty are well understood. This study will compare AC systems running with HFO-1234yf at the same time identical systems with R134a are run to understand the relative effect of HFO-1234yf versus R134a.
CitationGordon, T., Eustice, H., and Brooks, W., "Automotive AC System Oil Migration HFO-1234yf Vs. R134a," SAE Technical Paper 2011-01-1173, 2011, https://doi.org/10.4271/2011-01-1173.
Data Sets - Support Documents
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- SAE CRP1234-2 Miscibility Results chart data courtesy of Chris Seeton of Honeywell