Estimation of a time schedule for kiln drying, 1: A method to estimate a drying time for optional conditions
2007
Nakajima, A.(Hokkaido. Forest Products Research Inst., Asahikawa (Japan)) | Tsuchihashi, H. | Kawahara, A.
To estimate time schedules for kiln drying of karamatsu (Larix leptolepis) and todomatsu (Abies sachalinensis) sawn timbers, we conducted an investigation to determine the drying rates for six sawing sizes, timber with pith or without it, and three temperature conditions. The method for estimating the time schedule were summarized as follows: 1) Drying time was estimated by clarifying the coefficient of the drying rate at the approximating equation (1) which showed the decrease of moisture content (MC) in previous reports 1,2) to apply data from the drying tests. 2) By using the equation for the relationship between 'surface area/volume' and the coefficient of the drying rate, drying time was estimated to interpolate the coefficient of the drying rate at the difference of timber size for the sectional dimensions. 3) The drying schedule and drying time were applied in that time schedule for initial MC standardized at roughly 40-70% and revised when they were outside this range.
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