A dynamic object-oriented model for efficient simulation of microbial reduction in dispersed turbulent flow
Författare
Summary, in English
To account for microbial reduction and food quality changes, first-order chemical reaction was added to a model for axial-dispersed plug flow (ADPF), which was recently developed for efficient (In the terminology of this paper, efficient is related to computation time for a given level of accuracy.) computation of time-dependent, large flow systems. It was shown that the extended ADPF model gives accurate results for typical parameter values in liquid-food applications. The analysis was based on Laplace transforms and the models were written in the object-oriented language Modelica, as objects in a library structure which is being developed to simulate complex liquid-food process lines and their control systems. The models were also implemented in such a way as to efficiently account for non-isothermal reactions in heat exchangers.
Furthermore, to account for changes in flow rates, a model of dynamically calculating the “true” holding time in a channel was developed. Simulations showed that the model performs better than a straightforward alternative.
Furthermore, to account for changes in flow rates, a model of dynamically calculating the “true” holding time in a channel was developed. Simulations showed that the model performs better than a straightforward alternative.
Avdelning/ar
- Department of Food Technology, Engineering and Nutrition
Publiceringsår
2008
Språk
Engelska
Sidor
358-369
Publikation/Tidskrift/Serie
Journal of Food Engineering
Volym
86
Issue
3
Fulltext
- Available as PDF - 289 kB
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Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Food Engineering
Nyckelord
- Dynamic simulation
- Liquid-food
- Microorganisms
- Heat exchanger
- Dynamic model
- Residence time distribution
- Chemical reaction
- Microbial reduction
- Tube reactor
- Dispersion
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0260-8774