【摘要】 空分是国民经济发展不可或缺的行业,其能耗是该行业发展的瓶颈。内部热耦合空分塔(ITCASC)改变了传统空分塔结构,可达到良好的节能效果,是空分节能控制研究的前沿。本文提出了一种ITCASC混合建模方法,用液相组成、压强和相平衡温度的PCA-CGA-RBF统计模型,代替传统机理建模中泡点法计算温度的过程,可以显著提高模型求解效率。研究结果表明,混合模型求解时间从机理模型的31.06 s减少为11.18 s,减少了64.01%,而模型精度基本不变,有助于进一步的优化控制研究。更多还原

【Abstract】 Air separation is an essential industry for national economic development,its energy consumption has become the bottleneck of the development.Internal thermal coupled air separation column(ITCASC)changed the structure of traditional air separation column,which can achieve good energy efficiency and is a research front of air separation energy saving control.This paper presents an ITCASC hybrid method with the PCA-CGA-RBF statistical model of liquid phase composition,pressure and equilibrium temperature to instead of the traditional mechanisms of equilibrium stage modeling method,the proposed method can improve the efficiency of solving the model significantly.The results show that the solution time decreases from 31.06 s to 11.18 s,64.01% reduction,while the accuracy remains basically unchanged,which paves the way of further optimization and control researches.更多还原