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Inter-vial variance of the sublimation rate in shelf freeze-drier. Uniformization of the process by means of chamber wall temperature control.

[In Japanese. / En japonais.]

Author(s) : KOBAYASHI M., HARASHIMA K., ARIYAMA H., YAO A. R.

Type of article: Article

Summary

The authors developed a new model of laboratory-scale freeze-drier which has temperature-controllable chamber walls, and using this new model, they analyzed causes of inter-vial variance in the sublimation rate. The higher sublimation rate for the vials placed on the shelf edge is due to additional heat input from the wall and to further additional heat from the shelf surface on which no kissing vial is placed. It is possible to cancel out the additional heat input from the shelf by maintaining an optimum wall temperature, which must be lower than the material temperature. The paper discusses a method for eliminating the inter-vial variance in drying conditions and shortening the drying time by means of chamber wall temperature control.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-0588
  • Languages: Japanese
  • Source: Trans. JAR - vol. 10 - n. 1
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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