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Simplified crossover SAFT equation of state for pure fluids and fluid mixtures

机译：纯流体和流体混合物的简化交叉SAFT状态方程

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A simplified modification of the crossover statistical associating fluid theory (SAFT) EOS is used to describe thermodynamic properties of pure fluids and binary mixtures over a wide range of parameters of state including the nearest vicinity of the critical point. For pure fluids, the simplified crossover (SCR) SAFT model contains only three adjustable parameters but allows an accurate prediction of the critical parameters of pure fluids and yields a better representation of the thermodynamic properties of pure fluids than the original SAFT equation of state. For binary mixtures, simple mixing rules with only one adjustable parameter are used. A comparison is made with experimental data for pure refrigerants R12, R22, R32, R125, R134a, R143a, and mixtures R22 + R12, R32 + R134a and R125 + R32 in the one- and two-phase regions. The SCR SAFT EOS reproduces the saturated pressure data with an average absolute deviation (AAD) of about 1.1% and the saturated liquid densities with an AAD of about 0.9%. In the one-phase region, the SCR SAFT equation represents the experimental values of pressure with an AAD of about. 2.2% in the range of temperatures and density bounded by T greater than or equal to T-c and rho less than or equal to 2 rho (c). (C) 2000 Elsevier Science B.V. All rights reserved. [References: 76]
机译：交叉统计缔合流体理论（SAFT）EOS的简化修改用于描述在包括临界点最近附近在内的各种状态参数下纯流体和二元混合物的热力学性质。对于纯流体，简化的交叉（SCR）SAFT模型仅包含三个可调参数，但可以准确预测纯流体的关键参数，并且比原始SAFT状态方程更好地表示纯流体的热力学性质。对于二元混合物，使用仅具有一个可调参数的简单混合规则。将一相和两相区域中的纯制冷剂R12，R22，R32，R125，R134a，R143a以及混合物R22 + R12，R32 + R134a和R125 + R32的实验数据进行比较。 SCR SAFT EOS再现的饱和压力数据的平均绝对偏差（AAD）约为1.1％，饱和液体密度的AAD约为0.9％。在单相区域，SCR SAFT方程表示AAD约为的压力实验值。在T大于或等于T-c且rho小于或等于2 rho的温度和密度范围内的2.2％（c）。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：76]

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