Partager

Étude des propriétés thermiques d'un matériau à changement de phase grâce à un système optique à calorimètre par balayage différentiel.

Study on thermal properties of phase-change material by an optical DSC system.

Auteurs : WANG H. Y., LU S. S.

Type d'article : Article

Résumé

An optical differential scanning calorimeter (DSC) system was used in studying the thermal properties of phase-change material (PCM). In this study, several typical PCMs were studied in terms of their thermal properties by the optical DSC system. These PCMs are sodium sulfate (Na2SO4·10H2O), paraffin, n-octadecane, and the paraffin/n-octadecane composites at different mass ratios. The thermal properties and micro-structure change of these PCMs were mainly investigated. The results showed that for Na2SO4·10H2O, paraffin and n-octadecane, the measured phase-change temperatures and enthalpies showed no large relative deviation (<5%) from the theoretic values. A high measurement accuracy of the optical DSC system was obtained and inferred from the experimental results. For the paraffin/n-octadecane composites, the measured phase-change temperatures appeared to be lower than that of paraffin, and could be adjusted from 24.2°C to 49.6°C by changing the mass fractions of n-octadecane. The lowest eutectic temperature was obtained at the mass fraction 40% of n-octadecane. The measured phase-change enthalpies, however, showed no large variation between 186.4 J/g (paraffin) and 230.5 J/g (n-octadecane). And according to the micro-photos before and after phase change, n-octadecane existed as crystal particles which disappeared at increasing temperatures and was finally combined with the paraffin matrix.

Détails

  • Titre original : Study on thermal properties of phase-change material by an optical DSC system.
  • Identifiant de la fiche : 30008380
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 60 - n. 1-2
  • Date d'édition : 10/2013
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2013.06.055

Liens


Voir d'autres articles du même numéro (10)
Voir la source

Indexation