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A platform for research: civil engineering, architecture and urbanism
Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings
Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings delivered distributions of temperature and wood moisture content which can be considered as equilibrium states towards which the real temperature and moisture distribution are forced to move under the given differential climate. For an optimal moisture balance aim should be taken at maintaining a uniform and low level of wood moisture content over the cross section of the wooden profiles of wood/aluminium windows. The distribution of estimated equilibrium wood moisture content in the untreated model-window showed marked differences between the exterior and interior side of the wooden profiles when interior humidity stress occurs. Wood coatings can contribute to reduce these differences. Coatings with low permeability can promote the accumulation of moisture on the exterior side of the wooden profiles of wood/aluminium windows by restricting the release of water vapour. The same or even a better quality of protection of wood/aluminium windows against interior humidity stress as with high built coatings can be obtained by medium built coatings with higher permeability. An optimal moisture balance in the wooden profiles was achieved by using a low permeable coating on the interior side that restricts the ingress of water vapour into the wooden profiles and a more permeable coating on the exterior side that does not hinder moisture release. A more permeable coating on the interior side and a low permeable one on the exterior side can lead to severe accumulation of moisture on the exterior side of the wooden profiles of a wood/aluminium window.
Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings
Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings delivered distributions of temperature and wood moisture content which can be considered as equilibrium states towards which the real temperature and moisture distribution are forced to move under the given differential climate. For an optimal moisture balance aim should be taken at maintaining a uniform and low level of wood moisture content over the cross section of the wooden profiles of wood/aluminium windows. The distribution of estimated equilibrium wood moisture content in the untreated model-window showed marked differences between the exterior and interior side of the wooden profiles when interior humidity stress occurs. Wood coatings can contribute to reduce these differences. Coatings with low permeability can promote the accumulation of moisture on the exterior side of the wooden profiles of wood/aluminium windows by restricting the release of water vapour. The same or even a better quality of protection of wood/aluminium windows against interior humidity stress as with high built coatings can be obtained by medium built coatings with higher permeability. An optimal moisture balance in the wooden profiles was achieved by using a low permeable coating on the interior side that restricts the ingress of water vapour into the wooden profiles and a more permeable coating on the exterior side that does not hinder moisture release. A more permeable coating on the interior side and a low permeable one on the exterior side can lead to severe accumulation of moisture on the exterior side of the wooden profiles of a wood/aluminium window.
Computer modelling of steady-state moisture diffusion through wood/aluminium windows with different coatings
Rechnerische Modellierung für die stationäre Feuchtediffusion durch Holz/Aluminium-Fenster mit unterschiedlichen Beschichtungen
Grüll, Gerard (author) / Fitl, Rupert (author) / Teischinger, Alfred (author)
2004
20 Seiten, 10 Bilder, 5 Tabellen, 27 Quellen
Conference paper
English
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