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Wood Science and Technology

Erschienen in:

06.04.2017 | Original

Thermally limited wood moisture changes: relevance for dynamic vapour sorption experiments

verfasst von: Wim Willems

Erschienen in: Wood Science and Technology | Ausgabe 4/2017

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Abstract

In this research, an analytical model is developed for the study of thermal effects on transient uptake of moisture by wood exposed to a stepwise relative humidity (RH) change. This model specifically addresses the effect of the latent heat injection (withdrawal) during adsorption (desorption) on the equilibrium wood moisture content. It is explained that this inherent effect associated with wood moisture changes dominates at high RH in slow kinetic processes having time constants up to a few hundred minutes in 20 mg wood samples. In this dynamic range, the predicted RH dependence of the time constant is confirmed by dynamic vapour sorption experiments.

Vorheriger Artikel Reversible and irreversible dimensional changes of heat-treated wood during alternate wetting and drying

Nächster Artikel Effect of supercritical CO2 dewatering followed by oven-drying of softwood and hardwood timbers

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Titel: Thermally limited wood moisture changes: relevance for dynamic vapour sorption experiments
verfasst von: Wim Willems
Publikationsdatum: 06.04.2017
Verlag: Springer Berlin Heidelberg
Erschienen in: Wood Science and Technology / Ausgabe 4/2017
Print ISSN: 0043-7719
Elektronische ISSN: 1432-5225
DOI: https://doi.org/10.1007/s00226-017-0905-x

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