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La génération, la fraction de cristal et la viscosité des coulis à changement de phase (PCS) K2HPO4·6H2O.

Generation, crystal fraction and viscosity of K2HPO4·6H2O-PCS.

Numéro : pap. 0047

Auteurs : SCHMIT H., PAUCKNER D., LINN J., et al.

Résumé

The salt hydrate K2HPO4·6H2O has a melting temperature of around 14 °C, a melting enthalpy of 177 J g-1, and shows inhibited crystal growth. Due to these properties, K2HPO4·6H2O is a candidate as a phase change slurry (PCS). In this work, it is demonstrated, that the crystal fraction of K2HPO4·6H2O-PCS can be determined by using a turbidity sensor. Generation of K2HPO4·6H2O-PCS is possible by using the hydroscraped slurry generator method. However, with the used test setup, the limit of the crystal fraction was around 14 wt% due to clogging in the heat exchanger. Due to the formation of K2HPO4·3H2O in K2HPO4·6H2O-PCS, it was not possible to determine the viscosity of K2HPO4·6H2O-PCS. Therefore, the viscosity of K2HPO4·6H2O-PCS* with a slightly higher water content than K2HPO4·6H2O-PCS was determined. It was found, that up to about 16 wt% crystal fraction, the viscosity of K2HPO4·6H2O-PCS* increased to 1.7 relative to the purely liquid phase.

Détails

  • Titre original : Generation, crystal fraction and viscosity of K2HPO4·6H2O-PCS.
  • Identifiant de la fiche : 30023819
  • Langues : Anglais
  • Source : 12th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Orford, Canada, May 21-23, 2018.
  • Date d'édition : 21/05/2018
  • DOI : http://dx.doi.org/10.18462/iir.pcm.2018.0047
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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