| Abstract [eng] |
Wood drying – important part of woodworking process, performed in economical and technological directions. A number of factors are encountered when drying the wood that influence the quality of dried material. High-quality dried wood is expensive and it is easier to process than wet wood. Wood drying schedules selection is a very important part of production cycle. A variety of wood drying schedules are tested and their efficiency verified, according to the drying time and final distribution of moisture content in dried wood. The wide variation of moisture content in wood after drying, cause a lot of trouble to process wood further. Main goal of this scientific work – identify the influence of place in the drying kiln and drying schedule on moisture content distribution in wood. The study of wood drying is carried out in a convection drying chamber with electronic humidity and temperature sensors and computer controls (RGK 170, CSA Electronic, Germany). Four different modes of low temperature drying are applied. Wood drying schedules are adjusted based on wood species that will be drying. Birch (lat. Betula) wood was used for the production of samples. The tests were carried out by drying 37mm thickness birch wood to get 7.5% final moisture content of the wood. 240 birch wood samples has been made and 12 drying process performed in order to identify the influence of place in the drying kiln and drying schedule on moisture content distribution in wood. Wood humidity distributions in the applied drying schedule and place in the drying chamber were determined. Each drying process duration was found. All four schedules of drying were evaluated and the results are given. Research has shown that drying schedules doesn‘t have the effect on moisture content distribution in wood. However the place in the drying kiln affects moisture content distribution in wood. |
