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Dispersions à changement de phase pour des applications de refroidissement isotherme.

Phase change dispersions for isothermal cooling applications.

Numéro : 1948

Auteurs : FISCHER L. J., VON ARX S., O'NEILL P., MARANDA S., STAMATIOU A., WORLITSCHEK J.

Résumé

This work presents the development, characterisation and the application of a Phase Change Dispersion as a heat transfer fluid. The phase change dispersion contains CrodaTherm 24 droplets dispersed within water, which changes from solid to liquid whilst absorbing heat at a constant temperature and changes from liquid to solid whilst releasing heat. Firstly, this paper presents the thermophysical properties of the phase change dispersion, which melts around 22°C, from the developmental process in the laboratory such as particle size distribution, thermal stability, thermal profiles and dynamic viscosities. After this developmental process, an experimental test-rig was built to test the application of using the formulated phase change dispersion as a cooling fluid by exploiting the latent heat of phase change of the particles within the phase change dispersion. The premise of the developed test-rig is to allow the phase change dispersion to change continuously from suspension to emulsion in an electrically heated pipe and back to suspension by flowing through a water recooled plate heat exchanger system. From the test-rig, the phase change dispersion showed a constant apparent specific heat capacity of between 13-15 kJ kg-1 K-1 for a total of 72 hours continuous cycling, and managed to keep a temperature difference between inlet and outlet of 1 K.
 

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Pages : 8

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Détails

  • Titre original : Phase change dispersions for isothermal cooling applications.
  • Identifiant de la fiche : 30028850
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 13rd IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: (online) Vicenza, Italy, September 1-3, 2021.
  • Date d'édition : 01/09/2021
  • DOI : http://dx.doi.org/10.18462/iir.PCM.2021.1948
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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