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Cost-optimal heat exchanger network synthesis based on a flexible cost functions framework
Citation Link: https://doi.org/10.15480/882.2107
Publikationstyp
Journal Article
Date Issued
2019-02-26
Sprache
English
Author(s)
Rathjens, Matthias
Institut
TORE-DOI
TORE-URI
Journal
Volume
12
Issue
5
Article Number
784
Citation
Energies 12 (5): 784 (2019)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
Peer Reviewed
true
In this article an approach to incorporate a flexible cost functions framework into the cost-optimal design of heat exchanger networks (HENs) is presented. This framework allows the definition of different cost functions for each connection of heat source and sink independent of process stream or utility stream. Therefore, it is possible to use match-based individual factors to account for different fluid properties and resulting engineering costs. Layout-based factors for piping and pumping costs play an important role here as cost driver. The optimization of the resulting complex mixed integer nonlinear programming (MINLP) problem is solved with a genetic algorithm coupled with deterministic local optimization techniques. In order to show the functionality of the chosen approach one well studied HEN synthesis example from literature for direct heat integration is studied with standard cost functions and also considering additional piping costs. Another example is presented which incorporates indirect heat integration and related pumping and piping costs. The versatile applicability of the chosen approach is shown. The results represent designs with lower total annual costs (TAC) compared to literature.
Subjects
heat exchanger network
HEN
synthesis
optimization
direct heat integration
indirect heat integration
piping
pumping
DDC Class
600: Technik
620: Ingenieurwissenschaften
Publication version
publishedVersion
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energies-12-00784-v2.pdf
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