Modeling the hygrothermal behavior of biobased construction materials

Dubois, Samuel; Evrard, Arnaud; Lebeau, Frédéric

doi:10.1177/1744259113489810

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Modeling the hygrothermal behavior of biobased construction materials

Dubois, Samuel; Evrard, Arnaud; Lebeau, Frédéric

2013 • In Journal of Building Physics, p. 1-23

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https://hdl.handle.net/2268/150902

DOI
10.1177/1744259113489810

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Keywords :

Heat air and moisture modeling; Moisture Buffer Value; lime–hemp concrete; hygroscopic; latent heat

Abstract :

[en] Materials with high moisture exchange capacity may have a strong impact on indoor climate conditions as well as building energy performance. Crop-based materials, characterized by their high porosity and hygroscopicity, belong to this category. Modeling their hygrothermal behavior accurately is thus particularly relevant for appropriate building design. A COMSOL Multiphysics transient heat air and moisture model is developed in this article to simulate moisture exchange between a lime–hemp concrete block and surrounding air during a Moisture Buffer Value evaluation test. Results are then compared with the validated heat air and moisture software using performance criteria showing a slight preference for both moisture exchanges and latent heat effect characterization. It offers yet additional advantages in terms of flexibility and transparency as well as further evolution potential.

Disciplines :

Architecture
Energy
Agriculture & agronomy

Author, co-author :

Dubois, Samuel ; Université de Liège - ULiège > Doct. sc. agro. & ingé. biol.

Evrard, Arnaud; Université Catholique de Louvain - UCL > Architecture et Climat

Lebeau, Frédéric ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Mécanique et construction

Language :

English

Title :

Modeling the hygrothermal behavior of biobased construction materials

Alternative titles :

[en] Modélisation du comportement hygrothermique des matériaux de construction bio-sourcés

Publication date :

14 June 2013

Journal title :

Journal of Building Physics

ISSN :

1744-2591

eISSN :

1744-2583

Publisher :

SAGE Publications

Pages :

1-23

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://jen.sagepub.com/content/early/2013/06/12/1744259113489810

Funders :

FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]

Available on ORBi :

since 20 June 2013

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