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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Process simulation using the expanded fluid model for viscosity calculations
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Process simulation using the expanded fluid model for viscosity calculations

机译：使用扩展过程模拟流体模型对粘度的计算

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The expanded fluid (EF) viscosity model was implemented and further developed for efficient integration into a commercial process simulator (VMGSim (TM)). The model has three adjustable parameters per component and its inputs are density, pressure and low pressure gas viscosity. The model was adapted to use densities determined by the Rackett correlation (liquid phase) and the Advanced Peng-Robinson Equation of State (vapor phase). The enhanced EF model fit experimental viscosities of pure hydrocarbons, water and polar compounds important for the simulation of oil and natural gas systems with average absolute errors just above 5%. The implemented EF model was tested against experimental viscosity data that included hydrocarbon and aqueous mixtures with average absolutes errors of 0.7 and 6.2% respectively. Generalized expressions for the estimation interaction parameters of binary mixtures involving paraffins, naphthenes, aromatics, alcohols, glycols and water were obtained. The EF model was also applied to crude oil (bitumen) examples. The three key developments for the efficient implementation of the EF model in a commercial simulator were: (1) the appropriate selection of phase density models; (2) the automatic determination of model fluid specific parameters; and (3) the use of generalized mixing rules for the calculation of binary interaction parameters. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：扩大后的流体(EF)粘度模型实现效率和进一步发展集成到一个商业过程模拟器(VMGSim (TM))。每个组件和它的输入参数密度、压力和低压气体粘度。该模型适应使用密度决定由Rackett相关性(液相)和先进Peng-Robinson状态方程(蒸汽阶段)。纯碳氢化合物的粘度、水和极性的对仿真的石油和化合物重要天然气系统的平均绝对误差略高于5%的水平。测试实验粘度数据包括碳氢化合物和水混合物平均绝对误差为0.7和6.2%分别。二元交互参数的估计混合物包括石蜡、环烷烃、芳烃、醇、乙二醇和水获得的。油(沥青)的例子。发展的有效实现EF模型在一个商业模拟器是:(1)适当的选择阶段密度模型;液体特定的参数;广义混合规则的计算二元交互作用参数。化学工程师学会。爱思唯尔帐面价值保留所有权利。

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