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Diagramme de phase expérimental du système dodécane–tridécane comme matériau à changement de phase pour des applications d’entreposage frigorifique.

Experimental phase diagram of the dodecane–tridecane system as phase change material in cold storage.

Auteurs : GUNASEKARAN S., KUMOVA S., CHIU J. N. W., et al.

Type d'article : Article, Article de la RIF

Résumé

Integrating thermal storage with phase change materials (PCMs) in refrigeration and air conditioning processes enables energy performance improvements. Herein, the experimental phase diagram of the alkane system dodecane–tridecane (C12H26–C13H28) is evaluated to find PCMs for freezing applications. For that, the temperature-history method was coupled with a Tammann plot analysis. The obtained C12H26–C13H28 phase diagram indicated a congruent minimum-melting solid solution and polymorphs. The minimum-melting liquidus and the polymorphs identified here agree with previous literature. However, the system does not represent a eutectic, as previously was proposed. The minimum-melting composition is here identified within 15–20?mol% C13H28 compositions. The 17.7?mol% C13H28 is the narrowest minimum-melting composition among those analyzed, melting and freezing between -16 and -12?°C and between -17 and -15?°C, with the enthalpies 185?kJ?kg-1 and 165?kJ?kg-1; no supercooling; and only minor hysteresis. Hence, this blend has potential as a PCM in freezing refrigeration applications.

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Format PDF

Pages : 130-140

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    20 €

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Détails

  • Titre original : Experimental phase diagram of the dodecane–tridecane system as phase change material in cold storage.
  • Identifiant de la fiche : 30022276
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 82
  • Date d'édition : 10/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.06.003

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