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Title:Primerjava različnih modelov pri sublimacijskem sušenju
Authors:ID Verhnjak, Ožbej (Author)
ID Ravnik, Jure (Mentor) More about this mentor... New window
ID Hriberšek, Matjaž (Comentor)
Files:.pdf UN_Verhnjak_Ozbej_2015.pdf (2,69 MB)
MD5: 0167117FAC38D1926189B57D27153D76
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Liofilizacija je postopek, pri katerem preko poznavanja trojne točke izvedemo postopek sušenja s pomočjo sublimacije. Postopek je danes veliko v uporabi v živilski in farmacevtski industriji, saj tekom izvedbe hrana oziroma biološka tkiva ne izgubijo kvalitet, ki so jih imele v normalnem stanju. Ker pa je postopek drag, so nekatera podjetja izrazila željo po razvoju simulacijskega orodja, ki bi celoten proces uspel izračunati in tako preprečil nepotrebne stroške. V tem delu je opisano, na kakšen način je bilo simulacijsko orodje razvito. Podano je fizikalno ozadje procesa in pa različni modeli, ki ga morejo opisati. Ker v modelih nastopa veliko koeficientov je bilo potrebno preveriti, kateri imajo močan vpliv na rezultate preračuna. Na podlagi izrisanih grafov je bila narejena primerjava in podan rezultat. Zaradi večje uporabnosti programa je bil izdelan tudi uporabniški vmesnik, katerega nastanek je opisan.
Keywords:Sublimacijsko sušenje, liofilizacija, primerjava modelov, vpliv parametrov na izračun
Place of publishing:Maribor
Publisher:[O. Verhnjak]
Year of publishing:2015
PID:20.500.12556/DKUM-54041 New window
UDC:519.872:66.047.3.049.6(043.2)
COBISS.SI-ID:19138070 New window
NUK URN:URN:SI:UM:DK:L1DG6R9P
Publication date in DKUM:27.10.2015
Views:1495
Downloads:200
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Secondary language

Language:English
Title:Comparison of different physical models in freeze drying processes
Abstract:Lyophilisation is a drying process that uses the knowledge of the triple point of material to dry through sublimation. This process is nowadays used a lot, mostly in food and pharmaceutical industry, for, as it runs, the food and biological tissues don't lose qualities, that they used to have in the beginning. This procedure is expensive and for that reason some companies expressed a wish for a simulation tool, that would compute the process before the experiments and hence would get rid of unnecessary expenses. This work describes the development of such a tool. The physical background is written as well as different models with which the process can be described. In mathematical model there are plenty of coefficients that are necessary for computation and it has been a wish to test which one has the strongest influence on results. Different plots and comparisons were made and conclusions were drawn. At the end the user interface has been made for the software, since in that way it is more useful and gives more people ability to use it.
Keywords:Lyophilisation, comparison of different physical models, influence of coefficients on results, numerical model of lyophilisation


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