The accurate thermophysical model of pure refrigerant R1243zf was firstly established by the PR (Peng–Robinson) equation of state, where the deviation between the calculated and experimental data is less than 1 % for saturated pressures, and the average absolute deviation for superheated vapor density is 1.38 %. Then, the vapor–liquid equilibrium, enthalpy, and entropy properties of R1243zf/R134a, R1243zf/R1234ze(E), R290/R1243zf, and R600a/R1243zf four blends were investigated by associating the HV (Huron–Vidal) mixing rule, and the binary interaction coefficients of mixtures were also obtained. The results revealed that the average absolute deviations of mixtures are less than 1.05 % and 0.0033 for bubble pressures and vapor phase mole fractions, respectively. The flammability analysis of four blends indicated M1 (R1243zf/R134a (0.71/0.29)) and M2 (R1243zf/R1234ze(E) (0.64/0.36)) blends have a flammability group of A2L, whereas M3 (R290/R1243zf (0.11/0.89)) and M4 (R600a/R1243zf (0.08/0.92)) are classified as A2. Besides, near-azeotropic behaviors were observed for M1, M2, and M4 blends, with the temperature glides of less than 0.2 °C, while a temperature glide of 3.8 °C for M3 at 0.5 MPa. Finally, the working fluids in refrigeration system applications were explored, and the results presented that the highest operating pressure is obtained by R22, while R1243zf, M1, M2, M3, and M4 have similar operating pressures with R134a. Lower discharge temperatures and compression ratios of R1243zf and four blends than R134a are found at various operating conditions. Additionally, M4 shows slightly higher cooling and heating capacities and coefficients of performance than those of R134a and R22. Nevertheless, mixtures are inferior to R22 in terms of volumetric cooling capacity, whereas M3 gives a similar volumetric cooling capacity with R134a. Consequently, it can be concluded that R1243zf, M1, M2, M3, and M4 low-GWP refrigerants can be used as a drop-in replacement for R134a in refrigeration system applications.

纯制冷剂 R1243zf 的精确热物理模型首先由 PR (Peng-Robinson) 状态方程建立，其中饱和压力的计算和实验数据之间的偏差小于 1%，过热蒸汽密度的平均绝对偏差是 1.38%。然后，通过将 R1243zf/R134a、R1243zf/R1234ze(E)、R290/R1243zf 和 R600a/R1243zf 四种混合物的汽液平衡、焓和熵特性结合起来，研究了 R1243zf/R134a、R1243zf/R1234ze(E)、还获得了混合物的二元相互作用系数。结果表明，对于气泡压力和气相摩尔分数，混合物的平均绝对偏差分别小于 1.05% 和 0.0033。四种混合物的可燃性分析表明 M1 (R1243zf/R134a (0.71/0. 29)) 和 M2 (R1243zf/R1234ze(E) (0.64/0.36)) 混合物的易燃性组别为 A2L，而 M3 (R290/R1243zf (0.11/0.89)) 和 M4 (R600a/R129408z)f.被归类为A2。此外，观察到 M1、M2 和 M4 共混物的近共沸行为，温度下滑小于 0.2 °C，而 M3 在 0.5 MPa 下的温度下滑为 3.8 °C。最后，对制冷系统应用中的工质进行了探索，结果表明，最高工作压力由R22获得，而R1243zf、M1、M2、M3和M4的工作压力与R134a相似。在各种操作条件下，发现 R1243zf 和四种混合物的排放温度和压缩比低于 R134a。此外，M4 的冷却和加热能力和性能系数略高于 R134a 和 R22。尽管如此，混合物在体积冷却能力方面不如 R22，而 M3 的体积冷却能力与 R134a 相似。因此，可以得出结论，R1243zf、M1、M2、M3 和 M4 低 GWP 制冷剂可用作制冷系统应用中 R134a 的直接替代品。