Open AccessForecasting the final moisture of birch lumbers in the process of chamber drying
Author(s) -
Yu A Korchuk,
А. А. Орлов,
А. А. Попов,
A K Ovsyankin
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/839/5/052024
Subject(s) - water content , equilibrium moisture content , wood drying , evaporation , moisture , intensity (physics) , materials science , process (computing) , pulp and paper industry , significant difference , composite material , environmental science , mathematics , chemistry , meteorology , engineering , geotechnical engineering , computer science , sorption , physics , optics , organic chemistry , adsorption , statistics , operating system
The paper substantiates a method for predicting the timely completion of the process of convective drying of birch lumber. The results of statistical processing of industrial drying of birch lumber in MJR-150 chambers are presented. It has been established that there is a statistically significant dependence of the final moisture content of the dried batch of sawn timber on the temperature difference and equilibrium moisture content characterizing the intensity of moisture evaporation along the movement of the drying agent through the stacks. Depending on the thickness of the sawn timber in the last period of the drying process, the temperature difference is from 0.9 to 3.1 °C, and the EMC difference is from 0.5 to 0.9%. As the average moisture content of wood Wav in stacks decreases, the difference in temperature and equilibrium moisture content decreases. Graphical dependencies for birch lumber 25 and 50 mm thick were built. These graphs are offered to the camera operator as an additional tool for making a decision about the end of the drying process.