Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6453
Título: Modelling temperature variability in batch retorts and its impact on lethality distribution
Autor: Varga, Szabolcs
Oliveira, Jorge C
Smout, Chantal
Hendrickx, Mark E.
Palavras-chave: Conduction-heating
Mathematical modelling
Finite elements
In-pack sterilisation
Time-series
Data: 2000
Editora: Elsevier
Citação: VARGA, Szabolcs...[et al] - temperature variability in batch retorts and its impact on lethality distribution. Journal of Food Engineering. ISSN 0260-8774. Vol. 44 (2000), p. 163-174
Resumo: Experimental time±temperature distributions from two di erent industrial scale retort systems were statistically analysed. The retort temperature was modelled as the sum of a trend value and a residual, with the trend temperatures being simple functions of time. The residuals were modelled using time-series. The resulting impact on the lethality distribution was assessed by calculating the F-value distribution in the centre of cans simulated via a conduction-heating ®nite element model for 180 simulated temperature histories. Comparing the distributions obtained with those calculated using the actual experimental temperature histories validated the applicability of this approach. The results indicated that the experimental and the modelled average lethalities were statistically similar at 95% con®dence. The standard deviation was also similar for the F-value up to the end of holding but larger for the modelled distribution when considering the whole cycle, which was attributed to a correlation between the heating and cooling parameters that was not considered in the model.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6453
Versão do Editor: doi:10.1016/S0260-8774(00)00021-2
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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