Investigation of the Hygrothermal Performance of Alternative Insulation Materials

Carsten Rode, Finn Harken Kristiansen, Niels T. Rasmussen

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    Abstract

    The paper gives an account of hygrothermal investigations carried out on some insulation products which are "alternative" to the ones that are traditionally used in Danish constructions. The alternative products are claimed to be friendly both to the environment and to the labour force. The materials investigated are: cellulose insulation, sheep's wool, flax, and perlite. These materials, except for the last one, are very hygroscopic. The following two separate investigations are described.1. Investigation of the thermal conductivity at different humidity conditions.The thermal conductivity is determined for the different materials with a guarded hot plate apparatus in which different vapour pressure conditions can be maintained over the specimens. The apparatus and some results are presented.2. Computational analysis of the hygrothermal performance of constructions with alternative insulation products.The hygrothermal performance of constructions with alternative insulation products is analysed with a computational model for combined heat and moisture transfer. The analysis concerns both traditional wall and roof constructions with the alternative insulation products, and some alternative designs prescribed by manufacturers of alternative insulation materials.Both investigations are compared against similar results when mineral fibre insulation is used.
    Original languageEnglish
    Title of host publicationProceedings of the 5th Symposium on Building Physics in the Nordic Countries
    Place of PublicationGöteborg
    PublisherChalmers University of Technology and Swedish National Testing and Research Institute
    Publication date1999
    Pages137-144
    Publication statusPublished - 1999
    Event5th Symposium on Building Physics in the Nordic Countries - Gothenburg, Sweden
    Duration: 24 Aug 199926 Aug 1999
    Conference number: 5

    Conference

    Conference5th Symposium on Building Physics in the Nordic Countries
    Number5
    Country/TerritorySweden
    CityGothenburg
    Period24/08/199926/08/1999

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