韩晓红,陈光明,王勤

• 1:浙江大学制冷与低温研究所
• 2:浙江大学制冷与低温研究所
• 3:浙江大学制冷与低温研究所 浙江杭州310027
• 4:浙江杭州310027

摘要(Abstract)：

基于两参数状态方程提出的LCVM混合规则是将以无穷压力为参考态的HV混合规则与以零压力为参考态的MHV1混合规则线性结合而得的,尽管没有理论基础,但对于计算非极性、极性体系给出了较好的结果。因而研究借鉴获得LCVM混合规则的思路将LCVM混合规则扩展到多参数状态方程中,即将HVOS混合规则与MHV1混合规则进行线性结合,并通过引入两个对比参数λ0,λ∞给出了适合多常数状态方程的新LCVM型混合规则。在新的LCVM型混合规则中,参数δ决定了MHV1和HVOS混合规则的相对贡献,该参数可由模型在高压和低压下拟合二元混合物的泡露点得到,通过拟合得到的值约为0.21;混合规则中的活度系数模型可以利用由低压区关联出的GE模型。采用该新混合规则模型,在较宽的温度与压力范围内,结合Harmens-Knapp(HK)方程对包括非极性体系、极性体系等在内的20种二元混合物进行了相平衡计算。计算的结果与实验数据吻合得很好。该模型与采用VDW混合规则模型的相平衡计算结果比较表明,该模型的关联精度有了很大的提高,可以在较大的温度与压力范围内关联多种体系的汽液相平衡数据。但是在混合规则中,参数b,c是依赖于经验获得,因此还有待于进一步的研究。

关键词(KeyWords)： 汽液相平衡;状态方程;混合规则;活度系数

Abstract:

Keywords:

基金项目(Foundation): 浙江省自然科学基金资助项目(Z105034)

作者(Author): 韩晓红,陈光明,王勤

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