Towards the discovery of boiler physics in a Kraft recovery boiler using sparse identification of non-linear dynamics

dc.contributor.advisorHeyns, P.S. (Philippus Stephanus)
dc.contributor.coadvisorWilke, Daniel Nicolas
dc.contributor.emailackermann4321@gmail.comen_ZA
dc.contributor.postgraduateAckermann, Ivan
dc.date.accessioned2022-02-08T08:46:46Z
dc.date.available2022-02-08T08:46:46Z
dc.date.created2021-12
dc.date.issued2021
dc.descriptionDissertation (MEng (Mechanical Engineering))--University of Pretoria, 2021.en_ZA
dc.description.abstractThis dissertation seeks to discover the underlying physics, that govern a soot blowing procedure for the removal of ash deposits, in a Kraft recovery boiler. The methodology consists of the design of a thermodynamic model, aimed at calculating fouling levels in an online capacity, the discovery of the strengths and shortcomings of the SINDy algorithm, and the implementation of this algorithm to discover the soot blowing physics. Fouling levels are determined by means of heat transfer coefficients, as local fouling measurements are not available. The methodology is applied to the secondary superheater in the Kraft recovery boiler at the SAPPI Ngodwana mill. Implementation of the SINDy algorithm shows, that it is possible to discover simple, interpretable physics models, that can be used for generalisation outside of the training data domain, however, significant data pre-processing is required before consistent general models can be established.en_ZA
dc.description.availabilityUnrestricteden_ZA
dc.description.degreeMEng (Mechanical Engineering)en_ZA
dc.description.departmentMechanical and Aeronautical Engineeringen_ZA
dc.description.sponsorshipSAPPI Southern Africaen_ZA
dc.identifier.citation*en_ZA
dc.identifier.otherA2022en_ZA
dc.identifier.urihttp://hdl.handle.net/2263/83665
dc.identifier.uriDOI: 10.25403/UPresearchdata.19146149
dc.language.isoenen_ZA
dc.publisherUniversity of Pretoria
dc.rights© 2022 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.
dc.subjectAsh-foulingen_ZA
dc.subjectSoot blowingen_ZA
dc.subjectModel discoveryen_ZA
dc.subjectSINDyen_ZA
dc.subjectRecovery Boilersen_ZA
dc.subjectUCTD
dc.titleTowards the discovery of boiler physics in a Kraft recovery boiler using sparse identification of non-linear dynamicsen_ZA
dc.typeDissertationen_ZA

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