Evaluation of refrigerant oil for HFC refrigerants and selection of sliding materials

摘要

The most important characteristics of refrigerant oil is lubricity for the reliability of compresors.and the selection of sliding materials also is important.We suggest that the selection of refrigerant oils should be carried out based on their viscosiyt and pressure viscosity coefficinent,becasue there exists some mixed lubricatin depending on conditions.Tehrefore,prssure viscosity coefficient was measured by utilizing the opticla interference mehtod.THese measurements showed the good result of PVE.