Share

IIR document

Measurement and correlation development of the diffusion coefficient of R32 in lubricating oil.

Author(s) : XIE L., ZHUANG D., DING G.

Type of article: IJR article

Summary

R32 has been widely used in room air-conditioners, and its dissolution in lubricating oil can significantly affect the air-conditioner performance. The dissolved mass of R32 is determined by the diffusion coefficient which is related to the air conditioner working conditions, and thus a diffusion coefficient model that reflects the effects of the working conditions of temperature, pressure and initial concentration is needed. The purpose of this study is to develop a diffusion coefficient correlation of R32 in lubricating oil based on experimental investigation. The experiments of R32 absorption in lubricating oil are performed to measure refrigerant concentrations through refractive index, and then diffusion coefficients are obtained through the measured refrigerant concentrations. The experimental conditions cover the temperature of 35–50 °C, the pressure of 1.2–1.8 MPa and the initial refrigerant concentration of 0–8 %. The experimental results show that diffusion coefficients of R32 in the lubricating oil increase with the increase of temperature, pressure or initial refrigerant concentration. A new diffusion coefficient correlation which reflects the effects of temperature, pressure and initial concentration simultaneously is developed, and the proposed correlation could agree with 90 % of the experimental data within a deviation of ± 10 % and the average deviation is 5.4 %.

Available documents

Format PDF

Pages: 179-193

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Measurement and correlation development of the diffusion coefficient of R32 in lubricating oil.
  • Record ID : 30032340
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 162
  • Publication date: 2024/06
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2024.04.006

Links


See other articles in this issue (20)
See the source

Indexing