基于PR方程的碳酸二甲酯摩擦理论黏度模型

在对文献中发表的碳酸二甲酯黏度实验数据进行全面收集的基础上,将摩擦理论与工程上常用的Peng-Rob inson状态方程(PR方程)结合建立了碳酸二甲酯的液相黏度模型,通过最小二乘法回归得到了模型中的各系数。结果表明:在拟合范围内,碳酸二甲酯黏度模型的计算值与实验数据绝对平均偏差和最大偏差分别为1.78%和6.34%。所建立的黏度模型适用的温度范围为283—383 K,压力范围为饱和压力接近于100 MPa,文章为碳酸二甲酯作为替代燃料等的进一步深入研究和工程应用提供了黏度计算模型。

Friction theory viscosity model of dimethyl carbonate based on PR equation of state

The liquid viscosity experimental data of dimethyl carbonate were collected,and the liquid viscosity model of dimethyl carbonate was established by using the friction theory(f-theory) in conjunction with the Peng-Robinson(PR) equation of state(EOS).The coefficients of viscosity model were obtained by using the least square method.The results show that the overall average absolute deviation and the absolute maximum deviation between the experimental data and the values calculated from the viscosity model are 1.78% and 6.34%,respectively.The model is suitable for the temperatures from 283 K to 383 K and the pressures up to 100 MPa.It is apparent that this model is satisfactory and appropriate for most industrial applications.