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HEAT TRANSFER DURING THE HEATING AND COOLING OF PULPS IN 20 LITRE CYLINDRICAL CANS.

[In Portuguese. / En portugais.]

Author(s) : YAMAGATA H.

Type of article: Article

Summary

THE EFFECTS OF ROTATIONAL SPEED, CAN POSITION, LIQUID VISCOSITY AND HEADSPACE, WERE STUDIEDIN RELATION TO THE SPEED OF HEATING AND COOLING OF GUAVA PULP, 2.5% BY WEIGHT AQUEOUS SOLUTIONS OF CARBOXYMETHYLCELLULOSE (CMC) AND WATER, CONTAINED IN 20 LITRE CYLINDRICAL CANS. FOR EACH CONDITION AND PRODUCT, THE GLOBAL HEAT TRANSFER COEFFICIENTS OBTAINED DURING COOLING WERE NOT VERY DIFFERENT FROM THOSE OBTAINED DURING HEATING. AT 35 R.P.M. (3.7 RAD/S) AND IN THE HORIZONTAL POSITION, A 50 K FALL IN THE AVERAGE TEMPERATURE WAS OBTAINED IN 9 MINUTES WITH WATER, 24 MINUTES WITH THE CMC SOLUTION AND 23 MINUTES WITH THE GUAVA PULP. SIMILARLY, AN INCREASE IN 50 K OF THE AVERAGE TEMPERATURE OF THE PRODUCT WAS OBTAINED IN 8 MINUTES WITH WATER, 21 MINUTES WITH THE CMC SOLUTION, AND 18 MINUTES WITH THE GUAVA PULP.

Details

  • Original title: [In Portuguese. / En portugais.]
  • Record ID : 1984-0687
  • Languages: Portuguese
  • Source: Bol. ITAL - vol. 19 - n. 3
  • Publication date: 1982
  • Document available for consultation in the library of the IIR headquarters only.

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