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Thermal conductivity of controlled ice-fraction materials.

Author(s) : CARSON J. K., WANG J. F., WILLIX J., et al.

Summary

Effective thermal conductivity predictions for frozen products require both an ice fraction model and an effective thermal conductivity model; hence there are two degrees of freedom when comparing model predictions to experimental data for real foods, which can lead to misleading conclusions. To avoid ice fraction prediction uncertainties, thermal conductivity was measured for two types of ice samples (ice chips produced by a commercial ice maker, and synthetic snow) in which the ice and air fractions were controlled. Levy's effective thermal conductivity model provided reasonable predictions for the ice-chip data, although greater accuracy was obtained using a composite effective medium theory and co-continuous model. The Maxwell-Eucken model provided reasonable predictions for the synthetic snow data; however, systematic error in these measurements may have been significant.

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Pages: ICR07-C2-536

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Details

  • Original title: Thermal conductivity of controlled ice-fraction materials.
  • Record ID : 2008-0270
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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