Optimizing the pine wood drying process using a critical diffusion coefficient and a timed moistening impulse
Optimizing the pine wood drying process using a critical diffusion coefficient and a timed moistening impulse
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使用临界扩散系数和定时润湿脉冲优化松木干燥过程
DOI：
10.2478/fsmu-2021-0017
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
V. Tamme
中科院分区：
文献类型：
--
作者：
H. Tamme;P. Muiste;V. Tamme
本文论证了用两种独立的方法优化松木干燥过程是可能的。这些方法包括使用由下面所示的实验确定的临界扩散系数（DC）和/或在第二干燥阶段中的干燥空气润湿脉冲。当处理的数据已经从松木干燥实验中获得的，一致性和差异被发现时，从模拟的干燥过程中进行了使用相同的干燥时间表的结果相比。在模拟和实验确定的干燥曲线的情况下，干燥实验和TORKSIM v5.11模拟程序的模拟结果之间有相对较好的一致性。DC的数值大小与这一发现一致，在干燥实验的最后阶段在142小时的木材的水分分布、从干燥开始到进入该过程60小时的点的模拟和测量的木材表面温度、以及当与电表面-芯比（ESCR）图的最大值比较时的模拟木材应力也是如此。如实验所确定的。发现在从第一干燥阶段过渡到第二干燥阶段之后，DC的数值急剧减小约1.5倍。
Abstract This article demonstrates that it is possible to optimize the drying process for pine wood in two independent ways. Those ways involve either the use of the critical diffusion coefficient (DC) which is determined by the experiment shown below, and/or the drying air moistening impulse in the second drying phase. When processing data which has been gained from the pine wood drying experiment, both coincidences and differences were found when compared to the results from a simulation of the drying process which was carried out using the same drying schedule. There is a relatively good level of agreement between the drying experiment and the simulation results of TORKSIM v5.11 simulation program in the case of the simulated and experimentally determined drying curves. The magnitude of numerical values for the DC agrees with this finding, as do the wood's moisture profile in the final phase of the drying experiment at 142 hours, the simulated and measured wood surface temperatures from the beginning of drying to a point at 60 hours into the process, and the simulated wood stresses when compared with the maximum values for the electrical surface-core ratio (ESCR) graph, as determined by the experiment. It was found that the DC's numerical value decreases sharply by about 1.5 times after transitioning from the first drying phase to the second drying phase.