Impact of various conventional drying conditions on drying rate and on moisture content gradient during early stage of beechwood drying

Aleš Straže (Author), Stjepan Pervan (Author), Željko Gorišek (Author)

Abstract

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.

Keywords

sušenje lesa;Fagus sylvatica L.;bukev;

Data

Language:	English
Year of publishing:	2010
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	UL BF - Biotechnical Faculty
UDC:	630*847
COBISS:	1820553
Views:	728
Downloads:	179
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	sušenje lesa;Fagus sylvatica L.;bukev;
Type (COBISS):	Not categorized
Pages:	Str. 39-47
ID:	1033432