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dc.contributor.advisorCarson, James K.
dc.contributor.advisorLovatt, Simon
dc.contributor.advisorOlatunji, Jamal
dc.contributor.authorHoang, Duy
dc.date.accessioned2020-11-16T02:19:36Z
dc.date.available2020-11-16T02:19:36Z
dc.date.issued2020
dc.identifier.citationHoang, D. (2020). Modelling heat transfer during chilling and freezing of packaged foods in industrial refrigeration facilities (Thesis, Doctor of Philosophy (PhD)). The University of Waikato, Hamilton, New Zealand. Retrieved from https://hdl.handle.net/10289/13959en
dc.identifier.urihttps://hdl.handle.net/10289/13959
dc.description.abstractIndustrial refrigeration equipment companies are continuously looking for ways to optimise the design of chilling and freezing tunnels in order to minimise food quality loss and increase the energy efficiency of the equipment. However, possibilities for dedicated experimental tests of the industrial operations are limited due to a large amount of food product involved while the number of design variables to be considered is high. A cost-effective alternative to experiments is numerical modelling. The main goal of this research was to simulate heat transfer of packaged food products in a chilling and freezing tunnel. Computational fluid dynamics (CFD) models were developed to improve prediction in industrial cheese chilling and chicken freezing. The industrial cheese chilling model was developed based on six blocks of agar that mimic the product arrangement and airflow pattern of a cheese chiller; while the chicken freezing model represents the first case of a CFD freezing model where the geometry was derived empirically via computed tomography scan data. The model predictions were validated by experimental temperature histories generated as part of the study. Once validated, the model was used to investigate the cooling heterogeneity and the effect of different operating conditions on the processing time. In addition to the CFD model, a simple heat transfer simulation based on the one-dimensional finite difference method was developed for industrial users. Thermal property models in the literature were also reviewed to propose the most suitable choice for thermal processing calculations.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherThe University of Waikato
dc.rightsAll items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectModelling
dc.subjectCFd
dc.subjectChilling
dc.subjectFreezing
dc.subjectCheese
dc.subjectChicken
dc.titleModelling heat transfer during chilling and freezing of packaged foods in industrial refrigeration facilities
dc.typeThesis
thesis.degree.grantorThe University of Waikato
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (PhD)
dc.date.updated2020-11-13T21:25:36Z
pubs.place-of-publicationHamilton, New Zealanden_NZ


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