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Document IIF

Mesure des conductivité thermique et de la capacité calorifique des matériaux à changement de phase par la méthode de l'écoulement de chaleur longitudinal.

Measurement of thermal conductivity and heat capacity of phase change materials with the longitudinal heat flow method.

Numéro : pap. 7

Auteurs : BRÜTTING M., HAGEN T., VIDI S., et al.

Résumé

Even though Differential Scanning Calorimetry (DSC) is a common method for the determination of specific heat capacity, there is also need for methods suitable for a larger specimen size in the range of several cubic centimeters instead of micro liters. For phase change materials or compounds which show specimen size dependent thermophysical caloric properties below a critical specimen volume, e.g. sub cooling effects, the larger specimen volumes are absolutely essential. The Longitudinal Heat Flow Method is a well-known steady state method to measure the thermal conductivity of medium sized solid samples. With a modification of the measurement procedure to a transient temperature step at the top and bottom end of the stack it is now possible to determine the heat capacity of a specimen in a defined temperature interval. An apparent heat flux is determined during the transient heating phase, which can be evaluated with a novel analytical model. Numerical simulations of this new measurement method are validated by experimental investigation of different materials.

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Format PDF

Pages : 8

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    20 €

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Détails

  • Titre original : Measurement of thermal conductivity and heat capacity of phase change materials with the longitudinal heat flow method.
  • Identifiant de la fiche : 30017870
  • Langues : Anglais
  • Source : 11th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Karlsruhe, Germany, May 18-20, 2016.
  • Date d'édition : 18/05/2016
  • DOI : http://dx.doi.org/10.18462/iir.pcm.2016.0007

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