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On the applicability of a plug flow immersion freezer: theoretical considerations.

Author(s) : ZARKADAS D. M., MITRAKAS M.

Type of article: Article

Summary

The most promising means of fast-freezing is the immersion of the product in a liquid at a low temperature. The direct contact of a product with low temperature freezing mediums can cause several problems, the most usual being the burning of its surface or even its rupture, due to thermal shock. It is possible to overcome these problems with the application of a plug flow immersion freezer. A theoretical model was developed and tested for a plug flow immersion freezer used to freeze squid. Results indicate that the use of the proposed freezer is quite attractive for products of small thickness, up to 1 cm. A rather high heat-transfer coefficient value can be achieved; it is possible to set the temperature range of the freezing medium between -10 and -30 °C, significantly higher than those found in most commercial freezers.

Details

  • Original title: On the applicability of a plug flow immersion freezer: theoretical considerations.
  • Record ID : 2000-2970
  • Languages: English
  • Source: Lebensm.-Wiss. Technol. - vol. 32 - n. 8
  • Publication date: 1999

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