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dc.contributor.authorBrodal, Eivind
dc.contributor.authorJackson, Steven
dc.contributor.authorHailu, Getu
dc.date.accessioned2023-02-08T08:46:07Z
dc.date.available2023-02-08T08:46:07Z
dc.date.issued2022-11-28
dc.description.abstractProcess models using simplified heat exchanger (HE) models are often analyzed using methods based on derivatives or optimization procedures, where even small numerical errors can cause algorithms to fail. This article explores the use of numerical approximations for calculating pinch temperature and UA-value, including novel high-order polynomial methods using equidistant and Chebyshev grids. The results show that the mainstream methods, where LMTD and pinch temperature are calculated from grid values, are 2–5 times slower than the high-order methods if requiring accuracy better than 1%. If a 0.01% accuracy is needed high-order methods are often 10–20 times faster. Numerical errors in high-order schemes with pure fluids converge quickly to zero when increasing the grid size, and schemes with more than 30 grid points generate errors less than 1E-4%. High-order methods were less successful for fluid mixtures, where a novel hybrid high and low-order pinch temperature scheme is recommended.en_US
dc.identifier.citationBrodal, Jackson, Hailu. UA and pinch point temperature difference modeling — Finding the best heat exchanger schemes. Computers and Chemical Engineering. 2023;169(108085)en_US
dc.identifier.cristinIDFRIDAID 2087681
dc.identifier.doi10.1016/j.compchemeng.2022.108085
dc.identifier.issn0098-1354
dc.identifier.issn1873-4375
dc.identifier.urihttps://hdl.handle.net/10037/28512
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalComputers and Chemical Engineering
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleUA and pinch point temperature difference modeling — Finding the best heat exchanger schemesen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)