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Assessing the cold chain thanks to determinstic and stochastic approaches.

Évaluation de la chaîne du froid par des approches déterministes et stochastiques.

Author(s) : LAGUERRE O., HOANG M. H., DERENS E., et al.

Type of article: Article

Summary

Several surveys have shown temperature abuses in the last three links of the cold chain: display cabinets, transport by consumers and domestic refrigerators. This work was carried out to predict the product temperature and microbial load evolutions in these steps. Deterministic models were used to take into account the heat transfer by convection, conduction and radiation inside the equipments. They were combined with stochastic models to take into account different sources of randomness: external ambient temperature, thermostat setting, product position and storage time in the equipments etc. Distribution laws were developed to adjust the survey data of these random parameters. The sampling values of these parameters were used as input data of the heat transfer model to predict the temperature evaluations of a large number of products along the cold chain. Then, these temperature evaluations were applied to a growth model of Listeria monocytogenes to predict bacterial contamination. Statistical analysis of the simulation results was carried out enabling to predict the distribution of contamination levels according to the product cold chain course.

Details

  • Original title: Évaluation de la chaîne du froid par des approches déterministes et stochastiques.
  • Record ID : 30007903
  • Languages: French
  • Source: Revue générale du Froid & du Conditionnement d'air - vol. 102 - n. 1127
  • Publication date: 2012/10

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