Influence of Moisture on Heat Transfer Through Fibrous-Insulating Materials

    Published: Jan 1983

      Format Pages Price  
    PDF (236K) 19 $25   ADD TO CART
    Complete Source PDF (14M) 19 $75   ADD TO CART


    In a previous study, the thermal conductivity of a high-density mineral fiberboard had been experimentally determined as a function of moisture content at ambient temperature in steady-state conditions, allowing moisture to be redistributed in the product. The results obtained were significantly different from those of other authors who had performed experiments with a uniform moisture distribution. The present work is an attempt to understand the reasons for these differences. A second series of tests has been performed on the same high-density product in an attempt to re-create the results of these authors. A method of measurement has been developed, and the results obtained for mean temperatures of 10 and 24°C are presented and discussed. Special attention is given to the heat transfer caused by vapor diffusion and to the latent heat component of thermal conductivity due to this diffusion. A simple model for predicting the thermal conductivity in the conditions of the tests is presented; fairly good correlation with the experimental results was obtained. Finally, all results are compared and discussed in order to see which can be considered representative of field conditions.


    thermal insulation, thermal conductivity, heat transfer, moisture migration, fibrous material

    Author Information:

    Langlais, C
    Isover Saint-Gobain, Centre de Recherches Industrielles, Fantigny,

    Hyrien, M
    Isover Saint-Gobain, Centre de Recherches Industrielles, Fantigny,

    Klarsfeld, S
    Isover Saint-Gobain, Centre de Recherches Industrielles, Fantigny,

    Committee/Subcommittee: C16.30

    DOI: 10.1520/STP29472S

    CrossRef ASTM International is a member of CrossRef.