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DESIGN AND STUDY OF A FREEZE-DRIER USING A THREE-COMPONENT DIATHERMIC FLUID.

[In Chinese. / En chinois.]

Author(s) : WU J. B.

Type of article: Article

Summary

AN 8.1 M2 FREEZE-DRIER WAS DESIGNED AND PRODUCED IN 1982 FOR THE PRODUCTION OF FREEZE-DRIED ENZYMES, HORMONES AND OTHER BIOCHEMICAL PRODUCTS. THE DRYING TIME WAS 22 HOURS WITH A PRODUCTION CAPACITY OF 60,000 AMPOULES OF 2 MILLIL EACH. ENERGY CONSUMPTION IS 43 KILOWH FOR 10,000 AMPOULES WHICH IS LOWER THAN MOST OF THE PRESENT DRIERS OF THE SAME CAPACITY. THE KEY PROBLEM IN THIS DESIGN WAS THE SELECTION OF ANIDEAL THERMOCONDUCTION FLUID FOR THE COOLING AND HEATING OF PANELS IN THE DRIER. MANY EXPERIMENTS WERE CONDUCTED AND THE FLUID FINALLY SELECTED WAS COMPOSED OF 3 COMPONENTS: ETHYLENE GLYCOL 40%, ENTHYL ALCOHOL 20% AND WATER 40%. THE FLUID BOILING POINT IS 371 K (98 DEG C), FREEZING POINT 209 K (-64 DEG C), DENSITY 1 KG/L, SPECIFIC HEAT 3.14 KILOJ/KG K AND VISCOSITY 1 MM2/SEC AT 298 K (25 DEG C).

Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 1987-2451
  • Languages: Chinese
  • Source: J. chin. Assoc. Refrig. - n. 4
  • Publication date: 1986/12
  • Document available for consultation in the library of the IIR headquarters only.

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