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Impact of various conventional drying conditions on drying rate and on moisture content gradient during early stage of beechwood drying
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An appropriate moisture transport and a control of moisture distribution are needed from the early beginning of drying process, especially at drying of high dense and less permeable hardwoods. For determination of suitable process conditions at drying of European beechwood (Fagus sylvatica L.) the unidirectional drying kinetics, with an emphasis of free water removal was researched. We used radially oriented sapwood specimens, having thickness from6 mm to 24 mm (f L = 6 mm). Series of conventional drying processes were carried out in the laboratory tunnel drier at constant climate (T = 30
2.5 m/s) lead to early irreversible reduction of initial moisture flow and transition to the period of significantly falling drying rate, where the internal mass resistance predominated and caused high initial moisture content gradient. The diffusion barrier was induced at too fast free water removal which controlled further drying rate and significantly prolonged the drying process in continuation.
Not categorized (r6)
1.08 - Published Scientific Conference Contribution
BF - Biotechnical Faculty
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Record is a part of a monograph
The future of quality control for wood & wood products
Proceedings of the final conference of COST Action E53: Quality control for wood & wood products 4 - 7th May 2010, Edinburgh, UK
Edinburgh Napier University, Forest Products Research Institute / Centre for Timber Engineering
Place of publishing:
D. J. Ridley-Ellis, J. R. Moore
Fagus sylvatica L.
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