高温条件下木材升温时间的理论计算和实测

Theoretical Prediction of Heat Transfer in Wood and Experimental Verification

提出了木材热处理过程中高温干燥阶段升温时间的理论计算公式,并以20、40、60mm厚的杨木为试材,进行了验证试验。试验设置100、130、180℃三个升温阶段,测定了试材表面和芯层达到温度平衡的时间。结果表明,理论计算时间与试验实测时间能较好地吻合,应用理论计算公式,可为合理制定木材高温热处理工艺参数提供依据。

Theoretical prediction usually provides basic understanding and guidance to establish reasonable technology in the production process. A partial differential equation＇was used in this study to predict heat transfer time between the surface and core layer of wood during heat treatment. The prediction was compared with the result of an experiment that was performed on Chinese poplar lumber with various thicknesses of 20 mm, 40 mm and 60 mm. The times for the core temperature to reach to 100 ℃, 130 ℃, and 180 ℃ were recorded and compared with the predicted values. The comparison of the results showed that the theoretical predicted times matched the experimental values very well.