Summary
The effects of a polymer additive on the supercooling of water were investigated experimentally. Poly-vinyl alcohols (PVAs) were used as the additives, and samples were prepared by dissolving the PVA in water. Since the characteristics of PVA are decided by its degrees of polymerization and saponification, these were varied along with the concentration as the experimental parameters. Moreover, the effect of purity of the water was also considered. Each sample was cooled and the temperature at the instant when ice appeared was measured. Since the freezing of supercooled water is a statistical phenomenon, many experiments were carried out and the average degree of supercooling was obtained. It was found that PVA affects the nucleation of ice in supercooled water and the degree of supercooling increases with the addition of PVA even for water with low purity. The average degree of supercooling increases with an increase in the degree of saponification of PVA.
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Details
- Original title: Effects of poly-vinyl alcohol on supercooling phenomena of water.
- Record ID : 2009-0514
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 3
- Publication date: 2009/05
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Indexing
- Themes: Thermodynamics and changes of state
- Keywords: Thermodynamics; Alcohol; Supercooling; Polymer; Expérimentation; Water; Additive
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Study on effects of PVA (polyvinyl alcohol) on ...
- Author(s) : KUMANO H., HIRATA T., KUDOH T.
- Date : 2009/05/20
- Languages : English
- Source: ACRA-2009. The proceedings of the 4th Asian conference on refrigeration and air conditioning: May 20-22, 2009, Taipei, R.O.C.
- Formats : PDF
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Quantitative evaluation of the effects of poly-...
- Author(s) : KUMANO H., HIRATA T., TAKEDA S., et al.
- Date : 2011/12
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 8
- Formats : PDF
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- Author(s) : CHEN S. L., CHEN C. L.
- Date : 1999/10
- Languages : English
- Source: HVAC&R Research - vol. 5 - n. 4
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- Author(s) : NIST
- Date : 1997/03
- Languages : English
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Investigation on solid-liquid phase change kine...
- Author(s) : DU Y., GUI Y., XIAO C., et al.
- Date : 2008/08
- Languages : Chinese
- Source: Journal of Refrigeration - vol. 29 - n. 4
- Formats : PDF
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