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Experimental investigation and modeling of oil retention of R454B-PVE oil mixture in suction pipes of air conditioners. 

Author(s) : YAN Z., ZHAN F., ZHOU W., DING G., YUE B., WU Z., SHAO Y.

Type of article: IJR article

Summary

The refrigerant R454B and its compatible lubricating oil PVE are increasingly adopted in air conditioners. To prevent oil starvation in compressors, the amount of oil retention in suction pipes should be limited, and thus a model for predicting oil retention is needed. In this paper, an oil retention model of the R454B-PVE oil mixture in suction pipes is developed, which consists of a general model and 5 fluid-specific sub-models. The general model is built on the momentum conservation equations of the vapor phase and the liquid phase in the pipes, while the 5 fluid-specific sub-models are developed for 5 key parameters based on the experimental data on the oil retention characteristics of the R454B-PVE oil mixtures presented in this research. Model accuracies are vali dated by comparing the model predictions and the experimental data, and it is shown that the mean absolute deviations of predicted values of the sub-models from experimental ones are <12.0%, while the mean absolute deviations of the oil retention model in horizontal and vertical pipes are 14.3% and 11.7%, respectively.

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Details

  • Original title: Experimental investigation and modeling of oil retention of R454B-PVE oil mixture in suction pipes of air conditioners. 
  • Record ID : 30034929
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 187
  • Publication date: 2026/07
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2026.106922

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