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Continuous tubular microwave heating of homogeneous foods: evaluation of heating uniformity
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience. (Process and Environmental Engineering)ORCID iD: 0000-0001-6729-5710
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience. (Process and Environmental Engineering)ORCID iD: 0000-0002-2149-4586
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience. (Process and Environmental Engineering)ORCID iD: 0000-0001-7150-9099
Chalmers, Sweden.
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2016 (English)In: The Journal of microwave power and electromagnetic energy, ISSN 0832-7823, Vol. 50, no 1, 43-65 p.Article in journal (Refereed) Published
Abstract [en]

A pilot-scale process for continuous in-flow microwave processing of foods, designed and implemented at SP Food and Bioscience, was evaluated for heat treatment of a homogeneous model food for high-temperature short-time (HTST) conditions, at constant total input microwave power, at 2450 MHz. The microwave system has three consecutive cavities, one excited by the TM020 microwave mode that heats primarily in the tube centre, and two TM120 mode cavities that heat primarily in the tube periphery. The temperature uniformity of the homogeneous model food after microwave heating is here evaluated in terms of spatial distribution, for different set-ups of input microwave power in each cavity and for different order of the placement of the cavities, while maintaining the total input microwave power. The microwave heating uniformity is evaluated, based on measured and calculated radial temperature profiles. Combined TM020 and TM120 heating was found to result in more uniform heating by means of spatial temperature uniformity over the tube cross section. Furthermore, appropriately selected microwave power distribution between the centre and periphery heating cavities results in a stable heating profile in the studied food, that differs only about 10 °C or less between highest and lowest average values directly after microwave heating.

Place, publisher, year, edition, pages
London: Taylor & Francis Group, 2016. Vol. 50, no 1, 43-65 p.
Keyword [en]
Microwave in-flow heating, continuous process, microwave tubular heating, pumpable food, microwave pasteurization, microwave-assisted HTST system, homogeneous foods
National Category
Other Physics Topics Other Electrical Engineering, Electronic Engineering, Information Engineering Food Engineering Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ri:diva-31310DOI: 10.1080/08327823.2016.1157318OAI: oai:DiVA.org:ri-31310DiVA: diva2:1145419
Available from: 2017-09-28 Created: 2017-09-28 Last updated: 2017-10-02Bibliographically approved

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Wäppling Raaholt, BirgittaIsaksson, SvenHamberg, Lars
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