R1233zd(E)制冷剂CPA状态方程

CPA Equation of State of Refrigerant R1233zd(E)

R1233zd(E)属于氢氟烯烃类(HFOs)物质,是一种新型替代制冷工质。为更加精确地描述其热力学性质,以CPA状态方程为基础,利用文献公开报道的R1233zd(E)的饱和液相密度、饱和气体密度及饱和蒸气压测量数据,拟合获取到CPA状态方程的5个参数。基于MATLAB,实现了利用CPA状态方程计算工质的热力学性质。研究结果表明:CPA状态方程在求解饱和气相密度时,精度与SRK方程相比有所降低;计算饱和液体密度和单相液体密度时的精度显著提升。

R1233zd(E)belongs to hydrofluoroolefins(HFOs),which is a new type of alternative refrigerant.In order to describe its thermodynamic properties more accurately,based on the CPA equation of state,five parameters of the CPA equation of state were obtained by fitting the saturated liquid density,saturated liquid density and saturated vapor pressure of R1233zd(E)reported in the literature.Based on MATLAB,the thermodynamic properties of the working liquid were calculated using CPA equation of state.The research results showed that compared with the SRK equation of state,the CPA equation of state had a larger deviation when calculating the saturated gas phase density,but the accuracy of calculating the saturated liquid density and single-phase liquid density was significantly improved.