Partager

Document IIF

Étude mésoscopique de la conductivité thermique effective des sols secs et humides.

Mesoscopic study of the effective thermal conductivity of dry and moist soil.

Auteurs : CAI S., ZHANG B., CUI T., et al.

Type d'article : Article, Article de la RIF

Résumé

The ground heat exchanger (GHE) is a key component in the ground coupled heat pump (GCHP) system. The design of GHE significantly depends on the effective thermal conductivity of the ambient soil, which is derived from thermal response tests in the field. However, the test results normally indicate large differences in value, even at the same location. Such variations might be caused by the mesoscopic structure of soil. In order to clarify the impacts of the mesoscopic structural parameters on the effective thermal conductivity of soil-like materials, this paper presents and analyzes the findings from thermal probe tests and a modified random fractal model. It is found that porosity and degree of saturation are still the dominant factors, while the impacts of fractal dimension and size ratio are minor. The randomness of the porous structure in the soil-like materials does have considerable impact on the effective thermal conductivity.

Documents disponibles

Format PDF

Pages : 171-181

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Mesoscopic study of the effective thermal conductivity of dry and moist soil.
  • Identifiant de la fiche : 30025377
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
  • Date d'édition : 02/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.10.023

Liens


Voir d'autres articles du même numéro (51)
Voir la source

Indexation