A complex investigation of the nanofluids R600а-mineral oil-AL2O3 and R600а-mineral oil-TiO2. Thermophysical propertiesUne étude complexe des propriétés thermophysiques des nanofluides R600a-huile minérale-Al2O3 et R600a-huile minérale-TiO2

- Experimental information for thermophysical properties of the nanofluids is presented.
- Influence the nanoparticle additives on thermophysical properties is studied.
- SP-QSPR model is successfully applied for predicting the thermophysical properties.

This paper presents experimental data for the density, solubility, viscosity and capillary constant for solutions of the natural refrigerant isobutane (R600a) with mineral compressor oil and nanoparticles Al2O3 and TiO2 over a wide range of temperatures and concentrations. Based on obtained information for the capillary constant, the surface tension of the solutions isobutane/mineral oil/Al2O3 nanoparticles and isobutane/mineral oil/TiO2 nanoparticles is determined. SP-QSPR (Scaling Principles-Quantitative Structure Property Relationship) model has been successfully applied for fitting the experimental data obtained for solutions of isobutane with mineral compressor oil and nanoparticles Al2O3 and TiO2. It was shown that the nanoparticle additives lead to increase of the viscosity and reduce surface tension of the refrigerant/oil solutions.