||Beer pasteurization models
||Larsen, Kristina Hoffmann
||Thomsen, Per Grove (Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
||Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
||This thesis investigates and develops models for beer pasteurization. There are two different types of models which are used to describe the physics in the pasteurization. The simplest models are developed from general physical considerations which allows a fairly easy implementation in MATLAB. The implementations in MATLAB are examined with the perturbation, initialization and initial guess in mind and hereby allowing determination of whether the results are reliable or not.
The other type of models is more complicated and is generated by using partial differential equations for heat transfer and fluid flow. The models are produced in COMSOL Multi-physics which among many other things allows a visual presentation of the pasteurization process
To collect the necessary data sets for the models, experiments was made in a small scal pasteurizer located at Sander Hansen's research facility. The data sets from these experiments are used to make the implementation in MATLAB. Furthermore the data sets are used to verify the results from the COMSOL based models.
By using the collected data sets it is possible to investigate the coe±cients in the simple models and thereby propose improvements to these models. The data set also made it possible to examine the temperature in the pasteurizer and implement these new results in the models.
In this public version of the thesis 6 sections from the preproject are not included because they contain confidential information. This also means that some expressions in the thesis are rewritten. If you would like to know more about these sections and expressions or if something is di±cult to understand because of the missing sections you are welcome to contact Sander Hansen.
||In co-operation with Sander Hansen A/S.
||Department of Informatics and Mathematical Modeling, Technical University of Denmark, DTU : DK-2800 Kgs. Lyngby, Denmark
Creation date: 2006-10-06
Update date: 2012-12-18