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Pulp mill heat and mass balance model: Exploring the benefits and possibilities of process modelling as an applied method in a case study
Mälardalen University, School of Business, Society and Engineering.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis focused on the modelling of a pulping process. The purpose was to see if an accurate model can be crated based on relatively simple premises and if the errors can be identified or analysed. To realise this, the authors conducted a literature study to identify the current state of the art regarding the chemical pulping process. In addition, flow charts and sample data from a case study were examined. Based on the literature review and case study, model assumptions were derived. The model is divided into sixteen components. Where mixing occurs, lumped conditions are assumed. The model has five validation points, four of which are temperatures and a mass flowrate. These are shown as deviations from the measured values. In conclusions, it was the model could produce stable results over a narrow time frame. More so if the transition period at the start of the simulation is overlooked. Several new model assumptions are presented with the purpose to increase accuracy e.g. account for the components ability to store mass.

Place, publisher, year, edition, pages
2018. , p. 65
Keywords [en]
Energy balance model, kraft pulping, component based modeling, heat and mass balance model, digester model, impregnation vessel model, chip steaming and feeding model
National Category
Energy Engineering Energy Systems
Identifiers
URN: urn:nbn:se:mdh:diva-41292OAI: oai:DiVA.org:mdh-41292DiVA, id: diva2:1261270
Subject / course
Energy Engineering
Supervisors
Examiners
Available from: 2018-11-15 Created: 2018-11-06 Last updated: 2018-11-15Bibliographically approved

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fulltext(2806 kB)15 downloads
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2930313233343532 of 36
CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf