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Operational modes for heat pump drying: new technologies and production of a new generation of high quality dried fish products.

Author(s) : STRØMMEN I., EIKEVIK T. M., ALVES-FILHO O.

Summary

The paper presents new technology based on heat pump drying with production costs considerably lower than vacuum freeze drying but with similar qualities of dried products. The focus is on the design, dimensioning and operation of such heat pump dryers using a combined mode with drying temperatures below and above the product freezing point. Several materials were dried in test plants, including fish products, fruits, vegetables and dairy products. The interaction between the air side of the plant and the heat pump was studied and different system solutions with ammonia as the working fluid were scrutinized. Consequences on the dryer thermal efficiency and the heat pump coefficient of performance are presented.

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Details

  • Original title: Operational modes for heat pump drying: new technologies and production of a new generation of high quality dried fish products.
  • Record ID : 2004-1410
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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