The saturated vapor pressure of HFC134a mixed with mineral nano refrigeration oil was measured by way of the steady-state method. The measurement data were presented as the form of Youbi equation. The nano-partials NiFe2O4, the nano-partials CuO and the mineral lubricant SUNISO 3GS were used to preparation of the mineral nano refrigeration oil. The results show that the saturated vapor pressure of HFC134a mixed with mineral nano refrigeration oil is lower than that of HFC134a mixed with pure mineral lubricant SUNISO 3GS or that of pure HFC134a.

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