本文在假定AEOS∞≈[GE/(RT))]EOSp-＞0=[GE(x)/(RT)]solution model的基础上经过一系列的推导,将原WS混合规则中的交叉相互作用参数kij简化为一个只与组份和活度系数模型参数有关的函数,并将该简化后的WS混合规则(WS-S)结合PR状态方程及NRTL活度模型对16对双元混合物的汽液相平衡进行了关联.关联结果表明,在较宽的温度与压力范围内,应用该模型可得到令人满意的结果.与原WS混合规则相比,精度基本相当,但是计算量却得到了一定的减小,并使方程具有一定的预测性,可以更加方便地应用于工程设计计算中.
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