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Simulation of air velocity distribution in a freezing tunnel.

Number: pap. n. 33

Author(s) : WIDELL K. N., ALONSO M. J., NORDTVEDT T. S.

Summary

Batch freezing tunnels are essential in the cold chain for the Norwegian pelagic industry. The temperature of the fish core should be at least -18°C before the tunnel is unloaded. In order to keep an adequate working schedule, unloading should be done within 24 hours. The construction of the tunnel and the arrangement of the products are vital for the freezing time. The cold air should pass by every fish box in the tunnel before returning to the fan, which means no air shortcuts and no stagnant air inside the tunnel. This paper presents an analysis of how different configurations give different air distribution and also different product freezing times. Common tunnel construction is normally not optimal and several improvements can be suggested from simulations before building a new tunnel. An existing ammonia refrigeration system with several freezing tunnels was used as a model plant.

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Pages: 8 p.

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Details

  • Original title: Simulation of air velocity distribution in a freezing tunnel.
  • Record ID : 30014639
  • Languages: English
  • Source: 6th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, April 16-18, 2015.
  • Publication date: 2015/04/16

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