Hill-Climbing for Plantwide Control to Economic Optimum

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• 作者：Vivek Kumar ; Nitin Kaistha
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 22, 2014
• 年：2014
• 卷：53
• 期：42
• 页码：16465-16475
• 全文大小：531K
• ISSN：1520-5045

文摘

The application of hill-climbing control to 鈥渟eek鈥?and drive the unconstrained set point of controlled variables (CVs) to their economic optimum is proposed for economic plantwide control. Its application is demonstrated on a reactor-column recycle process for energy efficiency maximization at given throughput (Mode I) and also for maximizing process throughput (Mode II). In Mode I, a one degree-of-freedom hill-climbing feedback controller on top of the regulatory layer is shown to reduce reboiler duty by 3.7% for a 25% throughput increase compared to that of a constant set point operation. Similarly, in Mode II, a one degree-of-freedom hill-climber achieves 3.0% throughput increase compared to that of a constant set point operation. These results highlight the effectiveness of hill-climbing for economic plantwide control.