Gongran Ye,Yibo Fang,Yalun Li,Zhikai Guo,Lin Wang,Xiaohong Han
The absorption refrigeration system (ARS) was important for energy saving, which can be driven by low-grade energy. In this work, the mixtures of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) + N-methyl-2-pyrrolidone (NMP) and R1234ze(E) + triethylene glycol dimethyl ether (DMETrEG) were considered as the promising new working fluids for ARS. The vapor–liquid equilibrium (VLE) data of R1234ze(E) + DMETrEG and R1234ze(E) + NMP binary mixtures were measured using a liquid-recirculation apparatus from 293.15 to 353.15 K. The VLE data were correlated by the five-parameter non-random two-liquid activity coefficient model, and the correlated results showed a good agreement with the experimental VLE data. The average absolute relative deviation and maximum absolute relative deviation of the pressure were 1.70 and 5.11% for R1234ze(E) + NMP and 1.30 and 3.22% for R1234ze(E) + DMETrEG, respectively. The two binary mixtures exhibited positive deviations from Raoult’s law.
Owing to zero ozone depletion potential (ODP) and extremely low global warming potential (GWP), 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) as most potential refrigerants have attracted much interest in refrigeration and air conditioning (RAC). For a better insight into the refrigeration performance using R1234y and R1234ze(E) as refrigerants, the thermophysical properties of refrigerant/lubricant blends should be well understood, especially the viscosities of the refrigerant/lubricant blends. Using a self-designed-capillary apparatus, the viscosity measurements were performed for blends of POE85 oil saturated with R1234y and R1234ze(E) between 303.15 and 343.15 K. Viscosities of both R1234yf/POE85 and R1234ze(E)/POE85 have a similar trend. With an increase in solubility, the viscosity plunges dramatically at the beginning and then drops slowly. The results indicate that the refrigerant dissolved in oil has a large impact on the lubricant viscosity. The experimental data were successfully correlated by Eyring’s absolute rate theory coupled with modified two-suffix-Margules (Eyring-MTSM model).
危险品化学品经营许可证（带存储）