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Parallel column model for Dividing Wall Column simulations
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DOI：10.1016/j.compchemeng.2019.02.008.png)
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Dividing Wall Columns (DWC) have attracted considerable attention in recent years. It is often stated that no commercial flowsheet simulation package has yet offered a DWC as a standard model. As a result, nearly all simulations of DWCs employ interlinked multi-column equilibrium stage models in a sequential-modular process simulator. It is claimed that equation-based simulators offer advantages over sequential modular simulators when modelling DWCs but, to date, no empirical evidence in support of such a contention has been published. In this paper we describe an equation-based parallel column model (PCM) designed to enable the straightforward simulation of an entire DWC as though it were a single column. With the aid of simulations of several different DWCs with one, two, or three walls, and with one or two condensers, we demonstrate that an equation-oriented PCM can have good numerical performance, arguably superior to sequential-modular multi-column models. (C) 2019 Elsevier Ltd. All rights reserved.
Keyword:
Dividing Wall Column
DWC
Parallel column model
Equation-based
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