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A study of cooling rate of the supercooled water inside of cylindrical capsules.

Author(s) : BRAGA S. L., MILÓN GUZMÁN J. J., JIMÉNEZ-PACHECO H. G.

Type of article: Article, IJR article

Summary

An experimental apparatus was developed to investigate the supercooling phenomenon of pure water inside cylindrical capsules used for cold storage process. The phase change material used was distilled water. The external coolant material was a water-alcohol mixture (50% vol.), controlled by a constant temperature bath in four fixed values (-4, -6, -8, and -10°C). Temperatures varying with time were measured inside and outside the capsule. Cylindrical capsules with internal diameter of 30, 45, and 80 mm, with 1.5 mm wall thickness were made in aluminium, bronze or acrylic materials. The cooling rate was investigated for different positions on the internal wall of the capsule, for different external coolant temperatures, different capsules diameters and different materials. The results showed that the cooling rate is a strong function of the angular position on the internal wall, the coolant temperature, the capsule material, and the capsule's diameter.

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Pages: 953-959

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Details

  • Original title: A study of cooling rate of the supercooled water inside of cylindrical capsules.
  • Record ID : 2009-1692
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 5
  • Publication date: 2009/08

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