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Experimental research on the hygrothermal behaviour of natural insulation materials in wood frame walls : the effect of water infiltration on the drying potential and thermal performance

Anke Blommaert (UGent) , Lisa Lambrechts, Bruno Vanderschelden (UGent) , Nathan Van Den Bossche (UGent) and Marijke Steeman (UGent)
(2023) 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings.
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Abstract
Natural or bio-based insulation materials can be a promising alternative to insulation materials based on fossil fuels. Not only can they have a reduced embedded energy, also they typically have moisture buffering properties. However, they could also entail a higher risk for degradation under moist conditions. Currently the knowledge about the hygrothermal behaviour of thes e materials is insufficient to guarantee their widespread application. In this study, the hygrothermal behaviour of five bio-based insulation materials (wood wool, cotton, grass, hemp and hemp lime) is investigated by in situ testing in a test pavilion. Th is pavilion consists of a timber frame structure measuring 5,43 m by 3,13 m with a height of 2,76 m. Two out of the four walls are divided into compartments in which the various insulation materials are installed. For each insulation material two identical compartments are provided: one compartment always remains dry and the other compartment is exposed to accidental water infiltration. In these compartments the insulation layer is exposed to a water leak by pouring water into a tube connected to the outside. Homogeneous indoor conditions are ensured by the installation of a convector and fan. Various temperature and relative humidity sensors are positioned at different locations in the walls. On top of that, the heat flux over the compartments is measured. Based on the measurement data the hygrothermal behaviour of the insulation materials is compared. Both the influence of the water infiltration on the thermal performance of the compartments as well as the drying rate and the moistur e buffering behaviour were evaluated. It is observed that the wetting rate of the wood wool and hemp lime insulation is lower than the other natural insulation materials tested. The highest increase in heat flux after water infiltration is found for cotton insulation and grass.
Keywords
Bio-based insulation materials, Hygrothermal behaviour, Water infiltration, Drying potential, Thermal performance

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MLA
Blommaert, Anke, et al. “Experimental Research on the Hygrothermal Behaviour of Natural Insulation Materials in Wood Frame Walls : The Effect of Water Infiltration on the Drying Potential and Thermal Performance.” 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings, Itecons - Instituto de Investigação e Desenvolvimento Tecnológico para a Construção, Energia, Ambiente e Sustentabilidade, 2023.
APA
Blommaert, A., Lambrechts, L., Vanderschelden, B., Van Den Bossche, N., & Steeman, M. (2023). Experimental research on the hygrothermal behaviour of natural insulation materials in wood frame walls : the effect of water infiltration on the drying potential and thermal performance. 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings. Presented at the 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Funchal, Portugal.
Chicago author-date
Blommaert, Anke, Lisa Lambrechts, Bruno Vanderschelden, Nathan Van Den Bossche, and Marijke Steeman. 2023. “Experimental Research on the Hygrothermal Behaviour of Natural Insulation Materials in Wood Frame Walls : The Effect of Water Infiltration on the Drying Potential and Thermal Performance.” In 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings. Itecons - Instituto de Investigação e Desenvolvimento Tecnológico para a Construção, Energia, Ambiente e Sustentabilidade.
Chicago author-date (all authors)
Blommaert, Anke, Lisa Lambrechts, Bruno Vanderschelden, Nathan Van Den Bossche, and Marijke Steeman. 2023. “Experimental Research on the Hygrothermal Behaviour of Natural Insulation Materials in Wood Frame Walls : The Effect of Water Infiltration on the Drying Potential and Thermal Performance.” In 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings. Itecons - Instituto de Investigação e Desenvolvimento Tecnológico para a Construção, Energia, Ambiente e Sustentabilidade.
Vancouver
1.
Blommaert A, Lambrechts L, Vanderschelden B, Van Den Bossche N, Steeman M. Experimental research on the hygrothermal behaviour of natural insulation materials in wood frame walls : the effect of water infiltration on the drying potential and thermal performance. In: 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings. Itecons - Instituto de Investigação e Desenvolvimento Tecnológico para a Construção, Energia, Ambiente e Sustentabilidade; 2023.
IEEE
[1]
A. Blommaert, L. Lambrechts, B. Vanderschelden, N. Van Den Bossche, and M. Steeman, “Experimental research on the hygrothermal behaviour of natural insulation materials in wood frame walls : the effect of water infiltration on the drying potential and thermal performance,” in 2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings, Funchal, Portugal, 2023.
@inproceedings{01J1Q7M30K450JQ587RE1CE7S2,
  abstract     = {{Natural or bio-based insulation materials can be a promising alternative to insulation materials based on fossil fuels. Not only
can they have a reduced embedded energy, also they typically have moisture buffering properties. However, they could also
entail a higher risk for degradation under moist conditions. Currently the knowledge about the hygrothermal behaviour of thes e
materials is insufficient to guarantee their widespread application. In this study, the hygrothermal behaviour of five bio-based
insulation materials (wood wool, cotton, grass, hemp and hemp lime) is investigated by in situ testing in a test pavilion. Th is
pavilion consists of a timber frame structure measuring 5,43 m by 3,13 m with a height of 2,76 m. Two out of the four walls are
divided into compartments in which the various insulation materials are installed. For each insulation material two identical
compartments are provided: one compartment always remains dry and the other compartment is exposed to accidental water
infiltration. In these compartments the insulation layer is exposed to a water leak by pouring water into a tube connected to the
outside. Homogeneous indoor conditions are ensured by the installation of a convector and fan. Various temperature and
relative humidity sensors are positioned at different locations in the walls. On top of that, the heat flux over the compartments
is measured. Based on the measurement data the hygrothermal behaviour of the insulation materials is compared. Both the
influence of the water infiltration on the thermal performance of the compartments as well as the drying rate and the moistur e
buffering behaviour were evaluated. It is observed that the wetting rate of the wood wool and hemp lime insulation is lower
than the other natural insulation materials tested. The highest increase in heat flux after water infiltration is found for cotton
insulation and grass.}},
  author       = {{Blommaert, Anke and Lambrechts, Lisa and Vanderschelden, Bruno and Van Den Bossche, Nathan and Steeman, Marijke}},
  booktitle    = {{2nd International Conference on Construction, Energy, Environment & Sustainability (CEES 2023), Proceedings}},
  isbn         = {{9789895449934}},
  keywords     = {{Bio-based insulation materials,Hygrothermal behaviour,Water infiltration,Drying potential,Thermal performance}},
  language     = {{eng}},
  location     = {{Funchal, Portugal}},
  pages        = {{8}},
  publisher    = {{Itecons - Instituto de Investigação e Desenvolvimento Tecnológico para a Construção, Energia, Ambiente e Sustentabilidade}},
  title        = {{Experimental research on the hygrothermal behaviour of natural insulation materials in wood frame walls : the effect of water infiltration on the drying potential and thermal performance}},
  url          = {{https://www.cees2023.uc.pt/projectos/cees2023/index.php?module=sec&id=954&f=1}},
  year         = {{2023}},
}