Directional solidification for the controlled freezing of biomat

Details Directional solidification for the controlled freezing of biomat Directional solidification for the controlled freezing of biomat

1984-10-24

1985-07-30

Capossela, Ronald C.

Refrigeration

Processes

Treating an article

62 65, 62 78, 62378, F25D 1306

Patent

active

045313733

ABSTRACT:
Controlled freezing of a material (12) is accomplished by positioning an aliquot of the material (12) upon one surface (26) of a longitudinally extending substrate (14). First (30) and second (36) bases are provided each having heat transfer surfaces (32,40) which are adapted to sit in heat transfer relation with the other surface (24) of the substrate (14). The temperature of the first base (30) is controlled to be above the freezing temperature of the material (12). The temperature of the second base (36) is controlled to be below the freezing temperature of the material (12). The substrate (14) is moved longitudinally across the first base (30) in the direction of second base (36) while maintaining heat transfer relation of both bases (30,36) with the first surface (24) of the substrate (14). The frezzing rate of the material (12) is closely controlled and frozen material (12) can be produced in a continuous process.

REFERENCES:
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patent: 4388814 (1983-06-01), Schilline
Korber et al.: "Solute Polarization During Planar Freezing of Aqueous Salt Solutions", Int'l Journal of Heat and Mass Transfer, May 1982, vol. 26, No. 8, pp. 1241-1253.

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