Supercooling Water in Cylindrical Capsules

Authors: Guzman, J.; Braga, S.

Source: International Journal of Thermophysics, Volume 26, Number 6, November 2005 , pp. 1781-1802(22)

Publisher: Springer

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Abstract:

An experimental apparatus was developed to investigate the supercooling phenomenon of water inside cylindrical capsules used for a cold storage process. The coolant is a water–alcohol mixture controlled by a constant temperature bath (CTB). Temperatures varying with time are measured inside and outside the capsule. Cylinders with an internal diameter and thickness of 45 and 1.5┬ámm, respectively, were made from four different materials: acrylic, PVC, brass, and aluminum. The supercooling period of the water and the nucleation temperature were investigated for different coolant temperatures. The supercooling and nucleation probabilities are shown as a function of the coolant temperature for the four different materials.

Keywords: air conditioning; nucleation; phase change; refrigeration; supercooling; thermal storage

Document Type: Research Article

DOI: http://dx.doi.org/10.1007/s10765-005-8596-1

Affiliations: Email: slbraga@mec.puc-rio.br

Publication date: November 1, 2005

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