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http://dx.doi.org/10.9725/kts.2020.36.3.139

Study on Chemical Stabilities with R-1234yf Refrigerant of Polyol Ester Refrigerant Oil for Electric Vehicles  

Hong, J.S. (Korea Research Institute of Chemical Technology (KRICT))
Chung, K.W. (Korea Research Institute of Chemical Technology (KRICT))
Kim, N.K. (Korea Research Institute of Chemical Technology (KRICT))
Shin, J.H. (Korea Research Institute of Chemical Technology (KRICT))
Kim, Young Woon (Korea Research Institute of Chemical Technology (KRICT))
Lee, E.H. (NH chemicals)
Go, B.S. (NH chemicals)
Hwang, S.Y. (Hanon Systems)
Publication Information
Tribology and Lubricants / v.36, no.3, 2020 , pp. 139-146 More about this Journal
Abstract
Global warming has led to an increase in demand of eco-friendly vehicles, such as electric cars, for reducing greenhouse gas emissions, and especially, regulating carbon dioxide generation. In addition, electric vehicles are equipped with an electric drive-type hermetic scroll compressor and a refrigerant, which exhibit current and future trends of using environmentally friendly refrigerants, including R-1234yf. In this study, polyol ester-based refrigeration oils are prepared via condensation esterification of polyol and fatty acids. The oils can be combined with R-1234yf refrigerant for applications in air conditioning and cooling systems of electric vehicles. The structure of synthetic polyol esters is confirmed via 1H-NMR and FT-IR spectrum analysis, and the composition of the polyol ester is analyzed via gas chromatogram analysis. Furthermore, kinematic viscosity, viscosity index, total acid value, pour point, and color are analyzed as fundamental physical properties of the synthetic polyol esters. The compatibility and chemical stability of the synthetic polyol ester combined with the R-1234yf refrigerant are obtained via high temperature and high pressure oil-resistant refrigerant tests. The changes in the oil color and catalyst activity are observed before and after the experiment to determine whether it is suitable as a refrigerator oil.
Keywords
polyol esters; refrigerant oil; R-1234yf refrigerant; electric vehicle;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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