三元混合制冷剂 R290+R600a+N2 汽液相平衡实验研究.

In hydrogen liquefaction process,precooling cycle is an important link,among which the unit energy consumption of MR is relatively low,so it is particularly important to optimize the performance of MR.In this paper,the experimental system of VLE was built by the method of single-phase liquid phase cycle,and the properties of VLE in the ternary system R290+R600a+N2were studied.The temperature range of 273.15 K～323.15 K was used to study the ternary mixing medium R290+R600a+N2,and 18 groups of experimental data were obtained.At the same time,Peng-Pobinson-Stryjek-Vera （PRSV） equation of state combined with van der Waals（vdW） mixing rule was used to calculate the VLE properties of the ternary system.By comparing the experimental data with the calculated results,the average absolute relative deviation AARDp of the system pressure is 0.85%,and the average absolute deviation AADy1,AADy2and AADy3of the system components R290,R600a and N2are 0.0064,0.0027 and 0.0063,respectively. [ABSTRACT FROM AUTHOR]