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Crystallisation and rheology of an hydrate slurry as secondary two-phase refrigerant for air-conditioning application.

Author(s) : DABOURET M., COURNIL M., HERRI J. M.

Summary

Under atmospheric pressure condition and temperatures between 0 and 12°C, tetra-n-butylammonium bromide (TBAB) aqueous solutions crystallise into hydrate slurries. These slurries seem to be well appropriate for cold storage and transportation in the case of air-conditioning applications. The authors focus in the article on the crystallisation and the rheological properties of TBAB hydrates slurries. Once the crystallisation conditions described, they propose an experimental analysis of their flow behaviour. The experimental device is made up of a brushed surface heat exchanger in which the hydrates slurry is generated, and of a measurement loop. The flow behaviour of the slurry is characterised through flow rates and pressure drop measurements. The authors obtain flow curves of hydrates slurries depending on the volume fraction of hydrate solid particles. In the range of shear rate investigated, hydrate slurries behave as Bingham fluids. A method of determining their apparent viscosities and yield shear stress versus the volume fraction of hydrates is proposed.

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Details

  • Original title: Crystallisation and rheology of an hydrate slurry as secondary two-phase refrigerant for air-conditioning application.
  • Record ID : 2006-2939
  • Languages: English
  • Source: Proceedings of the sixth Workshop on Ice Slurries of the IIR/Proceedings of the Second Conference on Phase Change Material and Slurry (PCM 2005).
  • Publication date: 2005/06/15

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