A General Dynamic Model of a Complete Milk Pasteuriser Unit Subject to Fouling

Heat treatment of milk for hygiene and preservation is carried out in energy integrated pasteurisers units which include several plate heat exchangers (PHEs), a holding tube and ancillary piping. Fouling reduces energy efficiency and cleanings generate downtime and wastes. No detailed dynamic models...

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Bibliographic Details
Published inComputer Aided Chemical Engineering Vol. 48; pp. 247 - 252
Main Authors Zhu, Mengjia, Santamaria, Federico Lozano, Macchietto, Sandro
Format Book Chapter
LanguageEnglish
Published 2020
Subjects
dynamic modelling
food processing
milk fouling
pasteurisation
plate heat exchanger
pasteurisation
milk fouling
dynamic modelling
plate heat exchanger
food processing
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Summary:Heat treatment of milk for hygiene and preservation is carried out in energy integrated pasteurisers units which include several plate heat exchangers (PHEs), a holding tube and ancillary piping. Fouling reduces energy efficiency and cleanings generate downtime and wastes. No detailed dynamic models are currently available of full heating-cleaning cycles for an overall unit. Using a first principle modelling approach, a 2D dynamic thermal model, coupled with semi-mechanistic fouling and cleaning in place (CIP) models, is developed for the whole pasteurisation process, and used to test various heating-cleaning cycles. The model generality and flexibility are demonstrated for high temperature short time (HTST) and ultra-high temperature (UHT) treatments. The whole unit thermal model is validated against experimental data for a HTST process, with excellent agreement. Fouling evolution, distribution and impact are assessed for both processes. A UHT heating-cleaning cycle simulation enables quantifying the amounts of cleaning agent and waste water produced. The new model is suitable for control, optimisation of heating and cleaning strategies, and waste reduction studies.
ISBN:9780128233771
012823377X
ISSN:1570-7946
DOI:10.1016/B978-0-12-823377-1.50042-2