R1234ze(E)制冷剂PC-SAFT状态方程

PC-SAFT Equation of State for R1234ze(E)Refrigerant

R1234ze(E)属于氢氟烯烃类(HFOs)物质,是一种新型替代制冷工质。为了更加精确地描述其热力学性质,以PC-SAFT状态方程为基础,利用文献公开报道的R1234ze(E)的饱和液相密度及饱和蒸气压测量数据,拟合获取到PC-SAFT状态方程的3个参数。基于MATLAB软件,实现了利用PC-SAFT状态方程计算工质的热力学性质。研究结果表明:与CPA状态方程相比,PC-SAFT状态方程在计算饱和气相密度时偏差有所增大,但是在计算饱和液体密度和单相液体密度时的精度显著提升。

R1234ze(E)belongs to the class of hydrofluoroalkenes(HFOs)and is a new alternative refrigerant.In order to more accurately describe its thermodynamic properties,based on the PC-SAFT equation of state,three parameters of the PC-SAFT equation of state were obtained by fitting the saturated liquid density and saturated vapor pressure measurement data of R1234ze(E)reported in literature.Based on MATLAB,the thermodynamic properties of the working fluid were calculated using the PC-SAFT equation of state.The research results indicated that compared with the CPA equation of state,the PC-SAFT equation of state had an increase in deviation when calculating the density of saturated gas phase,but its accuracy was significantly improved when calculating the density of saturated liquid and single-phase liquid.