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<p>As part of a systematic investigation into the compatibility of the low-GWP refrigerant R-1243zf with commercial synthetic lubricants, this study extends our prior work on polyol ester (POE) mixtures to examine the thermophysical properties of R-1243zf with polyvinyl ether (PVE 68) and polyalkylene glycol (PAG 46) oils. Comprehensive experimental data on solubility, liquid density, and dynamic viscosity were obtained for both binary systems over temperatures ranging from 298.15&#xa0;K to 343.15&#xa0;K and pressures up to 1.0&#xa0;MPa. Complete miscibility was confirmed across all conditions for both refrigerant/lubricant pairs. The solubility followed the descending order PVE 68 &gt; POE RL 32 &gt; POE RL 68 &gt; PAG 46, highlighting the substantial influence of lubricant base-stock chemistry on absorption capacity. The NRTL model successfully correlated the vapor–liquid equilibrium data with average relative deviations below 0.8&#xa0;%. Mixture viscosity exhibited a strong dependence on refrigerant concentration, decreasing sharply in the oil-rich region, while density displayed a non-monotonic trend with composition. Both properties were accurately represented using excess-property models combined with Redlich–Kister expansions. Daniel charts constructed for each system illustrate the coupled effects of temperature, pressure, and composition on kinematic viscosity, providing practical guidance for lubricant selection in R-1243zf-based refrigeration applications.</p>

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Thermodynamic Properties of 3,3,3-Trifluoropropene with Polyvinyl Ether and Polyalkylene Glycol Mixtures

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Yanjun Sun,
  • Haiqi Zheng,
  • Gengguang Qin,
  • Xiaopo Wang,
  • Maogang He

摘要

As part of a systematic investigation into the compatibility of the low-GWP refrigerant R-1243zf with commercial synthetic lubricants, this study extends our prior work on polyol ester (POE) mixtures to examine the thermophysical properties of R-1243zf with polyvinyl ether (PVE 68) and polyalkylene glycol (PAG 46) oils. Comprehensive experimental data on solubility, liquid density, and dynamic viscosity were obtained for both binary systems over temperatures ranging from 298.15 K to 343.15 K and pressures up to 1.0 MPa. Complete miscibility was confirmed across all conditions for both refrigerant/lubricant pairs. The solubility followed the descending order PVE 68 > POE RL 32 > POE RL 68 > PAG 46, highlighting the substantial influence of lubricant base-stock chemistry on absorption capacity. The NRTL model successfully correlated the vapor–liquid equilibrium data with average relative deviations below 0.8 %. Mixture viscosity exhibited a strong dependence on refrigerant concentration, decreasing sharply in the oil-rich region, while density displayed a non-monotonic trend with composition. Both properties were accurately represented using excess-property models combined with Redlich–Kister expansions. Daniel charts constructed for each system illustrate the coupled effects of temperature, pressure, and composition on kinematic viscosity, providing practical guidance for lubricant selection in R-1243zf-based refrigeration applications.