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ANALYTICAL METHOD FOR PREDICTING FREEZING TIMES OF RECTANGULAR BLOCKS OF FOODSTUFFS.

Author(s) : PHAM Q. T.

Type of article: Article, IJR article

Summary

FOR IRREGULAR GEOMETRIES, THE DISTANCE FROM THE SURFACE TO THE THERMAL CENTRE IS NOT UNIFORM. THIS MAKES THE CALCULATION OF FREEZING TIME IMPOSSIBLE. THE DIFFICULTY CAN BE OVERCOME BY DEFINING A < MEAN CONDUCTING PATH > D WHICH CAN THEN BE USED TO CALCULATE BIOT NUMBERS. FOR RECTANGULAR BLOCKS, EXPERIMENTAL DATA SUGGEST THAT D IS PROPORTIONAL TO THE GEOMETRIC MEAN OF THE TWO SHORTER SIDES. FOR SQUAT-SHAPED BODIES D AVERAGES THE SHORTEST AND LONGEST DIMENSIONS. THE FREEZING TIME PREDICTION METHOD APPLIED TO BRICK-SHAPED BLOCKS YIELDS ABOUT THE SAME ACCURACY AS FOR THE BASIC SHAPES (INFINITE SLABS, INFINITE CYLINDERS AND SPHERES).

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Pages: 43-47

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Details

  • Original title: ANALYTICAL METHOD FOR PREDICTING FREEZING TIMES OF RECTANGULAR BLOCKS OF FOODSTUFFS.
  • Record ID : 1985-1472
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 8 - n. 1
  • Publication date: 1985

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