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Experiment on the phase change conditions and phase change latent heat of tetra-n-butyl ammonium bromide aqueous solutions for cold storage.

[In Chinese. / En chinois.]

Author(s) : SUN Z., JIANG C., SUN L.

Type of article: Article

Summary

Tetra-n-butyl ammonium bromide (TBAB) aqueous solution can form semi-clathrate hydrate at suitable solution concentration and temperature of chilled water at atmosphere pressure. It is a potential solid-liquid phase change material for cold storage in air conditioning systems. The solid-liquid phase change conditions of TBAB aqueous solutions were experimentally measured using the test rig for hydrate formation. The experimental results show that the phase change temperature of the TBAB hydrate increased with the increase of the concentration of the TBAB aqueous solution when the solution concentration was less than 45%, but the increment of the phase change temperature decreased when the TBAB solution mass fraction exceeded 25%. The phase change temperature of the TBAB hydrate decreased with the increase in the concentration of the TBAB aqueous solution when the solution concentration was more than 45%. The phase change latent of the TBAB aqueous solution was measured using the DSC rig and the test result shows that the phase change latent was about 195.9 kJ/kg.

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Pages: pp. 24-26

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2010-0139
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 30 - n. 129
  • Publication date: 2009/10

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