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Etude sur les mesures précises de la chaleur latente d'un matériau à changement de phase à bas point de fusion à l'aide de l'histogramme de la température.

A study of accurate latent heat measurement for a PCM with a low melting temperature using T-history method.

Auteurs : PECK J. H., KIM J. J., KANG C., et al.

Type d'article : Article, Article de la RIF

Résumé

When the latent heat of a phase change material (PCM) with a lower melting point than ambient temperature was assessed according to the standard T-history method using a vertically oriented test tube, a temperature gradient occurred in the longitudinal direction of the tube due to natural convection. This led to a decrease in the accuracy of the latent heat of fusion measurement. In this study, the accuracy of the measurement with the original T-history method was improved without decreasing the test's simplicity and convenience by setting the test tube horizontally. The heat transfer to the vapour-layer of the tube under volume change during melting was assumed to be negligible and the results were calculated using the two inflection points of temperature as the start and end of latent heat period. Under these assumptions, the results agree closely with other reference data. And, the new method proposed in this study showed a remarkable reduction in data scattering.

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Format PDF

Pages : 1225-1232

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Détails

  • Titre original : A study of accurate latent heat measurement for a PCM with a low melting temperature using T-history method.
  • Identifiant de la fiche : 2006-2189
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 7
  • Date d'édition : 11/2006

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