Superstructure-based MINLP Formulation for Divided-Wall Column (DWC) Design
Date Issued
2008
Date
2008
Author(s)
Tseng, Yi-Ling
Abstract
Owing to the rising cost of energy and the fact that new energy resources are not yet available to all, how to utilize energy in an efficient way has become an important issue for industrial processes. In high energy-consuming chemical industrials, the distillation process plays the most part in consuming energy. Therefore, all savant devote improving the distillation system to promote the nergy-consuming efficiency. Until now, the relevant literature of the distillation system, the energy integration of distillation is the most interesting. Divided-wall Distillation Column (DWC) is the one of energy integration of distillation. Based on a superstructure which incorporates all possible schemes, this work aims to propose a general mixed-integer nonlinear programming (MINLP) formulation for modeling and optimizing the Divided-wall Distillation Column, where design objectives include the minimization of energy consumption and the minimization of total annual cost (TAC). For a three component feed, Optimal operating conditions can be obtained with different feed conditions according to the model of this work. For one thing, results from the proposed mathematical formulation will be compared with the results from Underwood''s method to comfirm its correction. For the next, the results are also compared with the results of conventional distillation systems to illustrate that the advantages of energy-consuming and capital investment cost of Divided-wall Distillation Column (DWC).
Subjects
Divided-Wall Distillation Column
MINLP
Optimization
SDGs
Type
thesis
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