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为了获得混合制冷剂R134a/R1234yf的热物性数据,以Burentt法为基础搭建的高精度PVTx试验台,测定了混合制冷剂R134a/R1234yf质量分数为40%/60%,65%/35%和60%/40%、温度范围为268 K~323 K的PVT性质,并且拟合了三种不同配比的混合工质的气态维里方程。实验数据与方程的平均误差为1%左右,具有较好的重合度,为进一步研究混合制冷剂R134a/R1234yf气液相平衡特性奠定了基础。
In order to obtain the thermophysical data of the mixed refrigerant R134a / R1234yf, the high-precision PVTx test stand based on the Burentt method was used to determine the mass percent of the mixed refrigerant R134a / R1234yf of 40% / 60%, 65% / 35% and 60% % / 40%, PVT of 268 K ~ 323 K in the temperature range, and fit the gas Villi equation of three different mixtures. The average error between the experimental data and the equation is about 1%, which shows a good coincidence degree, which lays the foundation for further study on the gas-liquid equilibrium characteristics of the mixed refrigerant R134a / R1234yf.