Study on the Interaction Coefficients in PR Equation with vdW Mixing Rules for HFC and HC Binary Mixtures
Study on the Interaction Coefficients in PR Equation with vdW Mixing Rules for HFC and HC Binary Mixtures
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DOI：
10.1007/s10765-008-0528-4
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发表时间：
2008-11
影响因子：
2.2
通讯作者：
Jian-Xin Chen;P. Hu;Zeshao Chen
中科院分区：
文献类型：
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作者：
Jian-Xin Chen;P. Hu;Zeshao Chen
采用Peng-Robinson状态方程和货车der Waals混合规则关联了HFC/HC、HFC/HFC和HC/HC二元混合物的汽液平衡数据。对每一个二元混合物，得到了相互作用参数kij。假设kij具有来自两个组分的贡献，并且每个组分对于混合物具有其自身的恒定贡献因子kij，并且kij的值指示两个组分之间的性质差异的程度。因此，相互作用参数kij被建议为：kij=ki−kj。采用最小二乘法拟合了丙烷、异丁烷、正丁烷、R23、R32、R125、R143 a、R134 a、R152 a、R227 ea、R236 fa、R236 ea和R245 fa等6种碳氢化合物（HFCs和HC）的混合因子k。在此基础上，共分析了39个制冷剂的二元混合物，结果表明，与实验数据吻合良好。压力和蒸气摩尔分数的总平均绝对偏差分别为1.3%和0.0089.
The Peng-Robinson equation of state with the van der Waals mixing rules was used to correlate vapor–liquid equilibrium (VLE) data for HFC/HC, HFC/HFC, and HC/HC binary mixtures. The interaction parameterkijwas obtained for every binary mixture. It was assumed thatkijhas contributions from the two components, and each component has its own constant contribution factorkifor the mixture, and the values ofkijindicate the degree in difference of properties between the two components. Therefore, the interaction parameterskijis proposed as:kij=ki−kj. The values of the mixing factorkifor Hydrofluorocarbons (HFCs) and Hydrocarbons (HCs), including propane, isobutane, n-butane, R23, R32, R125, R143a, R134a, R152a, R227ea R236fa, R236ea, and R245fa, were obtained by least-square fitting. In total, 39 refrigerant binary mixtures were analyzed on the basis of this method, and the results showed good agreement with experimental data. The overall average absolute deviations of pressure and vapor mole fraction are 1.3 % and 0.0089, respectively.