Séchage des bois ronds à basse température

Abstract : This stage took place in the LERMaB and among the CoolWood project that aims to develop an innovative process of log preservation at low temperatures. Yet, there are only few studies on drying wood at such temperatures. This internship aimed to characterize the migration of vapor water among the bark of three trees : spruce (Picea abies), oak (Quercus ) and beech (Fagus sylvatica), and also to study the drying of little spruce logs with or without bark at temperatures around 10°C. A 1m3 cooling chamber has been used, a humidifier built during this study within, for the drying experiments. The sorption isotherms of each species' bark are relatively close. The diffusion coefficients of water vapor in the bark are in the order of 10-13m²/s for spruce, and 10-11m²/s for oak. The reduced diffusivities of bark are in order of 10-8 for spruce and for 10-6 oak. Those coefficients have not been estimated for beech bark. The drying of spruce logs is possible yet slow; it can be accelerated if the bark is removed. The extrapolation of the results to simulate drying of entire logs could be done with the TransPore code.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2014_GUERINEAU_BAPTISTE.pdf
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Baptiste Guérineau. Séchage des bois ronds à basse température. Sciences de l'environnement. 2014. ⟨hal-01836077⟩

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