An extended algorithm of flexibility analysis in chemical engineering processes

An extended algorithm of flexibility analysis with a local adjusting method for flexibility region of chemical processes, which is based on the active constraint strategy, is proposed, which fully exploits the flexibility reg ion of the process system operation. The hyperrectangular flexibility regio n determined by the extended algorithm is larger than that calculated by th e previous algorithms. The limitation of the proposed algorithm due to impe rfect convexity and its corresponding verification measure are also discuss ed. Both numerical and actual chemical process examples are presented to de monstrate the effectiveness of the new algorithm.