Dynamic Modelling and Simulation of Liquid Food Process Lines

Tomas Skoglund

Dynamic Modelling and Simulation of Liquid Food Process Lines

Tomas Skoglund

Livsmedelsteknik

Forskningsoutput: Avhandling › Doktorsavhandling (sammanläggning)

1364 Nedladdningar (Pure)

Sammanfattning

Popular Abstract in Swedish
I följande arbete har ett dynamiskt modellbibliotek av komponenter utvecklats för processlinjer. Analysen inriktades mot karakteristiska aspekter för processlinjer för flytande livsmedel, och nya modeller utvecklades för byte av fluidum, dispersion, blandfaser och första ordningens kemiska reaktioner i rör och värmeväxlare. Modellernas beräkningseffektivitet och noggrannhet analyserades. Det visades att klassiska modeller av fluiders propagering i processlinjer kunde kombineras med moderna numeriska metoder för att uppnå beräkningseffektiva dynamiska modeller för simulering av dispergerat konvektivt flöde, med och utan kemiska reaktioner.

Speciellt demonstrerades att en transportfördröjningsmodell väl lämpar sig för simulering av termiska transienter orsakad av byte av fluidum i värmeväxlare. Det visades att modellen kunde kompletteras med dispersion genom en metod som, trots klassisk metodik, möjliggör viss frihet i val av diskretisering beroende på behovet av noggrannhet visavi beräkningshastighet. Ytterligare komplettering av modellen med första ordningens kemiska reaktioner för simulering av mikrobiell deaktivering demonstrerades.

Dessutom demonstrerades användbarheten av modellen för dispergerat konvektivt flöde i syfte att prediktera storlek på blandfaser och mängd bortsorterad produkt vid kontinuerlig produktion. Relevansen med avseende på spårbarhet diskuteras och konceptet ?fuzzy spårbarhet? införs.

Originalspråk	engelska
Kvalifikation	Doktor
Tilldelande institution	Livsmedelsteknik
Handledare	Dejmek, Petr, handledare
Tilldelningsdatum	2007 juni 12
Förlag	Department of Food Technology, Engineering and Nutrition, Lund University
ISBN (tryckt)	978-91-976695-1-1
Status	Published - 2007

Bibliografisk information

Defence details

Date: 2007-06-12
Time: 13:00
Place: Lecture Hall B, Center of Chemistry and Chemical Engineering, Getingevägen 60, Lund, Sweden

External reviewer(s)

Name: de Prada Moraga, César
Title: Professor
Affiliation: Dpt. of Systems Engineering and Automatic Control, Universidad de Valladolid, c/ Real de Burgos s/n.

---

<div class="article_info">Tomas Skoglund, Karl-Erik Årzén and Petr Dejmek. <span class="article_issue_date">2006</span>. <span class="article_title">Dynamic object-oriented heat exchanger models for simulation of fluid property transitions</span> <span class="journal_series_title">International Journal of Heat and Mass Transfer</span>, <span class="journal_volume">vol 49</span> <span class="journal_pages">pp 2291-2303</span>. <span class="journal_distributor">ELSEVIER</span></div>
<div class="article_info">Tomas Skoglund and Petr Dejmek. <span class="article_issue_date">2007</span>. <span class="article_title">Adynamic object-oriented model for efficient simulation of fluid dispersion in turbulent flow with varying fluid properties</span> <span class="journal_series_title">Chemical Engineering Science</span>, <span class="journal_volume">vol 62</span> <span class="journal_pages">pp 2168-2178</span>. <span class="journal_distributor">ELSEVIER</span></div>
<div class="article_info">Tomas Skoglund and Petr Dejmek. <span class="article_issue_date"></span>. <span class="article_title">A dynamic object-oriented model for efficient simulation of microbial reduction in dispersed turbulent flow</span> <span class="journal_pages">pp 20</span>. (submitted)</div>
<div class="article_info">Tomas Skoglund and Petr Dejmek. <span class="article_issue_date"></span>. <span class="article_title">Fuzzy traceability - A process simulation derived extension of the traceability concept in continuous food processing</span> <span class="journal_pages">pp 8</span>. (submitted)</div>

Ämnesklassifikation (UKÄ)

Livsmedelsteknik

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Doctoral_thesis_T_Skoglund_20070612

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@phdthesis{fd97c2cc3560499ebde43da9f8fc2611,

title = "Dynamic Modelling and Simulation of Liquid Food Process Lines",

abstract = "In the present work a dynamic model library of components for process lines was developed. The analysis addressed characteristic aspects of liquid food process lines, and new models were developed for fluid transitions, dispersion, mixing zones and first-order chemical reactions in pipes and heat exchangers. The computational efficiency and accuracy of the models were analysed. It was demonstrated that classical models of fluid propagation in process lines could be combined with modern numerical methods to obtain computationally efficient dynamic models for the simulation of dispersed convective flow, with and without chemical reactions. In particular it was demonstrated that a transport delay model was well suited for the simulation of thermal transients due to fluid transitions in heat exchangers. It was shown that the model could be extended to account for dispersion with a method that, although classical in approach, enables a certain freedom in the choice of degree of discretization depending on the demand for accuracy vs. computational speed. Further extension of the model with first-order chemical reactions to account for microbial deactivation was demonstrated. The usefulness of the dispersed-convection model to predict the extent of mixing zones and the amount of product rejects in continuous processing was demonstrated. The relevance concerning product traceability is discussed and the concept ?fuzzy traceability? introduced.",

keywords = "Process lines, Dynamic model, Microbial deactivation, Data- och systemvetenskap, computer technology, Systems engineering, Fuzzy traceability, Traceability, Thermal engineering, termodynamik, Termisk teknik, applied thermodynamics, Chemical technology and engineering, Kemiteknik och kemisk teknologi, Food and drink technology, Heat exchanger, Dispersion, Fluid property transition, Liquid food, Dynamic simulation, Livsmedelsteknik",

author = "Tomas Skoglund",

note = "Defence details Date: 2007-06-12 Time: 13:00 Place: Lecture Hall B, Center of Chemistry and Chemical Engineering, Getingev{\"a}gen 60, Lund, Sweden External reviewer(s) Name: de Prada Moraga, C{\'e}sar Title: Professor Affiliation: Dpt. of Systems Engineering and Automatic Control, Universidad de Valladolid, c/ Real de Burgos s/n. --- <div class={"}article_info{"}>Tomas Skoglund, Karl-Erik {\AA}rz{\'e}n and Petr Dejmek. <span class={"}article_issue_date{"}>2006</span>. <span class={"}article_title{"}>Dynamic object-oriented heat exchanger models for simulation of fluid property transitions</span> <span class={"}journal_series_title{"}>International Journal of Heat and Mass Transfer</span>, <span class={"}journal_volume{"}>vol 49</span> <span class={"}journal_pages{"}>pp 2291-2303</span>. <span class={"}journal_distributor{"}>ELSEVIER</span></div> <div class={"}article_info{"}>Tomas Skoglund and Petr Dejmek. <span class={"}article_issue_date{"}>2007</span>. <span class={"}article_title{"}>Adynamic object-oriented model for efficient simulation of fluid dispersion in turbulent flow with varying fluid properties</span> <span class={"}journal_series_title{"}>Chemical Engineering Science</span>, <span class={"}journal_volume{"}>vol 62</span> <span class={"}journal_pages{"}>pp 2168-2178</span>. <span class={"}journal_distributor{"}>ELSEVIER</span></div> <div class={"}article_info{"}>Tomas Skoglund and Petr Dejmek. <span class={"}article_issue_date{"}></span>. <span class={"}article_title{"}>A dynamic object-oriented model for efficient simulation of microbial reduction in dispersed turbulent flow</span> <span class={"}journal_pages{"}>pp 20</span>. (submitted)</div> <div class={"}article_info{"}>Tomas Skoglund and Petr Dejmek. <span class={"}article_issue_date{"}></span>. <span class={"}article_title{"}>Fuzzy traceability - A process simulation derived extension of the traceability concept in continuous food processing</span> <span class={"}journal_pages{"}>pp 8</span>. (submitted)</div>",

year = "2007",

language = "English",

isbn = "978-91-976695-1-1",

publisher = "Department of Food Technology, Engineering and Nutrition, Lund University",

school = "Department of Food Technology, Engineering and Nutrition",

}

TY - THES

T1 - Dynamic Modelling and Simulation of Liquid Food Process Lines

AU - Skoglund, Tomas

N1 - Defence details Date: 2007-06-12 Time: 13:00 Place: Lecture Hall B, Center of Chemistry and Chemical Engineering, Getingevägen 60, Lund, Sweden External reviewer(s) Name: de Prada Moraga, César Title: Professor Affiliation: Dpt. of Systems Engineering and Automatic Control, Universidad de Valladolid, c/ Real de Burgos s/n. --- <div class="article_info">Tomas Skoglund, Karl-Erik Årzén and Petr Dejmek. <span class="article_issue_date">2006</span>. <span class="article_title">Dynamic object-oriented heat exchanger models for simulation of fluid property transitions</span> <span class="journal_series_title">International Journal of Heat and Mass Transfer</span>, <span class="journal_volume">vol 49</span> <span class="journal_pages">pp 2291-2303</span>. <span class="journal_distributor">ELSEVIER</span></div> <div class="article_info">Tomas Skoglund and Petr Dejmek. <span class="article_issue_date">2007</span>. <span class="article_title">Adynamic object-oriented model for efficient simulation of fluid dispersion in turbulent flow with varying fluid properties</span> <span class="journal_series_title">Chemical Engineering Science</span>, <span class="journal_volume">vol 62</span> <span class="journal_pages">pp 2168-2178</span>. <span class="journal_distributor">ELSEVIER</span></div> <div class="article_info">Tomas Skoglund and Petr Dejmek. <span class="article_issue_date"></span>. <span class="article_title">A dynamic object-oriented model for efficient simulation of microbial reduction in dispersed turbulent flow</span> <span class="journal_pages">pp 20</span>. (submitted)</div> <div class="article_info">Tomas Skoglund and Petr Dejmek. <span class="article_issue_date"></span>. <span class="article_title">Fuzzy traceability - A process simulation derived extension of the traceability concept in continuous food processing</span> <span class="journal_pages">pp 8</span>. (submitted)</div>

PY - 2007

Y1 - 2007

N2 - In the present work a dynamic model library of components for process lines was developed. The analysis addressed characteristic aspects of liquid food process lines, and new models were developed for fluid transitions, dispersion, mixing zones and first-order chemical reactions in pipes and heat exchangers. The computational efficiency and accuracy of the models were analysed. It was demonstrated that classical models of fluid propagation in process lines could be combined with modern numerical methods to obtain computationally efficient dynamic models for the simulation of dispersed convective flow, with and without chemical reactions. In particular it was demonstrated that a transport delay model was well suited for the simulation of thermal transients due to fluid transitions in heat exchangers. It was shown that the model could be extended to account for dispersion with a method that, although classical in approach, enables a certain freedom in the choice of degree of discretization depending on the demand for accuracy vs. computational speed. Further extension of the model with first-order chemical reactions to account for microbial deactivation was demonstrated. The usefulness of the dispersed-convection model to predict the extent of mixing zones and the amount of product rejects in continuous processing was demonstrated. The relevance concerning product traceability is discussed and the concept ?fuzzy traceability? introduced.

AB - In the present work a dynamic model library of components for process lines was developed. The analysis addressed characteristic aspects of liquid food process lines, and new models were developed for fluid transitions, dispersion, mixing zones and first-order chemical reactions in pipes and heat exchangers. The computational efficiency and accuracy of the models were analysed. It was demonstrated that classical models of fluid propagation in process lines could be combined with modern numerical methods to obtain computationally efficient dynamic models for the simulation of dispersed convective flow, with and without chemical reactions. In particular it was demonstrated that a transport delay model was well suited for the simulation of thermal transients due to fluid transitions in heat exchangers. It was shown that the model could be extended to account for dispersion with a method that, although classical in approach, enables a certain freedom in the choice of degree of discretization depending on the demand for accuracy vs. computational speed. Further extension of the model with first-order chemical reactions to account for microbial deactivation was demonstrated. The usefulness of the dispersed-convection model to predict the extent of mixing zones and the amount of product rejects in continuous processing was demonstrated. The relevance concerning product traceability is discussed and the concept ?fuzzy traceability? introduced.

KW - Process lines

KW - Dynamic model

KW - Microbial deactivation

KW - Data- och systemvetenskap

KW - computer technology

KW - Systems engineering

KW - Fuzzy traceability

KW - Traceability

KW - Thermal engineering

KW - termodynamik

KW - Termisk teknik

KW - applied thermodynamics

KW - Chemical technology and engineering

KW - Kemiteknik och kemisk teknologi

KW - Food and drink technology

KW - Heat exchanger

KW - Dispersion

KW - Fluid property transition

KW - Liquid food

KW - Dynamic simulation

KW - Livsmedelsteknik

M3 - Doctoral Thesis (compilation)

SN - 978-91-976695-1-1

PB - Department of Food Technology, Engineering and Nutrition, Lund University

ER -

Dynamic Modelling and Simulation of Liquid Food Process Lines

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