Theoretical Determination of Moisture and Heat Transfer To Lumber During Preheating

Zhu-Qiang Hou, Xiao-Mei Jiang, Ning Guan, Zhangjing Chen


Two-dimensional heat and mass flux equations were used to describe preheating process during wood drying. Mathematical formulae of heat and moisture transfer to wood were developed. Based on the theoretical calculation, the increase in lumber moisture content (MC) was less than 8% during the preheating process. The calculated results also indicated that it takes about 3 h for the center of 4-cm-thick lumber to reach ambient temperature.


Chemical potential;heat transfer;moisture transfer

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