Abstract:

Divided wall column (DWC) is a new energy-saving distillation technology. However, its optimal design is a mixed integer nonlinear programming (MINLP) problem, and it is difficult to optimize the solution. In this paper, an online Kriging surrogate model-based optimization method is proposed and applied to the total annual cost optimization of DWC. Through the proposed method, the optimal solution of the optimization problem can be obtained by a small number of rigorous simulation data points. The solution of an illustrating example shows that, compared with the traditional offline surrogate model-based optimization method, the proposed method is more advantageous in terms of accuracy and effectiveness, being able to overcome the shortcomings of the traditional offline surrogate based-model optimization, such as time-consuming and large amount of calculation.

Key words: surrogate model, Kriging model, divided wall column, computer simulation, optimization

摘要：

隔板塔是一种新型的精馏节能技术，但其优化设计属于混合整数非线性规划问题，优化求解困难。本文提出在线Kriging代理模型优化方法，将其应用于隔板塔年度总费用优化。与传统离线代理模型相比，本文方法采用少量的隔板塔严格模拟数据点，即可得到优化问题的最优解。计算表明，较传统离线代理模型，本文提出的在线代理模型显示了更高的准确性和有效性，可以克服传统离线代理模型优化耗时、计算量大的缺点。

关键词: 代理模型, Kriging模型, 隔板塔, 计算机模拟, 优化