Abstract

An approach is reported for the preliminary design of single product batch/semicontinuous plants. The methodology consists of two components: a new approximate sizing procedure, which determines the number of units in parallel at each stage as well as the sizes of the batch and semicontinuous units and a set of synthesis rules, which serve to select structural features such as consecutive tasks that should be merged or split and tasks that should be separated by intermediate storage. The sizing procedure can accommodate both new plant design as well as some simple forms of retrofitting applications. The effectiveness of the approach is demonstrated with comparisons to designs obtained using nonlinear programming formulations solved by using a generalized reduced-gradient algorithm.

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