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[求助]
英文翻译求助 化工分离 多组分分离严格算法
It is shown that the well-known and extensively used bubble-point methods, such as the one proposed by Wang and Henke for simulating vapor liquid multistage distillation problems, can be used efficiently for the simulation of other types of vapor liquid multistage separation problems, such as absorption and reboiled-absorption processes, even when the thermodynamic properties are a strong function of the composition. Via numerical simulations, it is shown that a robust bubble-point temperature iteration scheme provides convergence stability in the whole bubble-point method. The proposed robust bubble-point temperature iteration scheme is a combination of an equation decoupling method and a simultaneous method. This hybrid bubble-point temperature iteration scheme exploits the reliability of the equation decoupling method, which makes good convergence progress from a poor starting point.However, if the initial point in the bubble-point temperature calculation is good enough, only the equation decoupling method is used, to avoid excessive successive substitution steps when the separation factors are updated. As a consequence of the extension of the bubble-point method to simulate absorption cases, a didiagonal matrix with an off column is generated, when the interstage vapor rates are calculated. An efficient and simple algorithm derived from the Gaussian elimination method to solve the didiagonal matrix with an off column is presented. Results are reported for distillation, absorption, and reboiled-absorption processes, using the Soave Redlich Kwong equation of state.众所周知泡点法已被科学界认可和广泛使用，如由王与亨克提出的模拟多级汽液蒸馏原理可以很好地用于其他类型的汽液多级分离仿真模拟。例如吸收和再沸吸收过程，即使对于一个热力学性质组成非常复杂的系统，也可以通过数据模拟来进行仿真实验。通过数据仿真实验结果表明，一个可靠的泡点温度迭代方法可以保证在整个泡点法中收敛的稳定性。以上提到的可靠泡点温度迭代方法是由耦合方程和同步方程组合而成。这种混合泡点温度迭代计划利用方程耦合法的稳定性，使得收敛问题从一个差的起点有了很好的进展。但是，如果在泡点温度计算初始点是不够好，只有使用方程耦合方法，当分离因子被更新时才能避免过多的连续替代步骤。由于泡点法存在扩展模拟吸收情况，当计算级间汽率时会产生一个二对角矩阵和一个相关联的列向量。一个高效简单的算法是用高斯消去法求解得出的二对角矩阵和关联的列向量。蒸馏，吸收，再沸吸收过程使用S-R-K状态方程来验证其结果。这是我粗浅的翻译的，麻烦高人翻译或者改正，这个读不通的。
[ Last edited by 米尔蜜儿 on 2011-6-3 at 12:00 ] |
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