NDLI: Development and Validation of a Simulation Model for the Temperature Field during High-Frequency Heating of Wood

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Haojie Chai Jingyao Zhao Yingchun Cai
Abstract	In the process of applying high-frequency heating technology to wood drying, controlling the material temperature affects both drying speed and drying quality. Therefore, research on the heat transfer mechanism of high-frequency heating of wood is of great significance. To study the heat transfer mechanism of high-frequency heating, the finite element method was used to establish and solve the wood high-frequency heating model, and experimental verification was carried out. With a decrease in moisture content, the heating rate decreased, then increased, and then decreased again. There was no obvious linear relationship between the moisture content and heating rate; the simulation accuracy of the heating rate was higher in the early and later drying stages and slightly lower near the fiber saturation point. For the central section temperature distribution, the simulation and actual measurement results matched poorly in the early drying stage because the model did not fully consider the differences in the moisture content distribution of the actual test materials. In the later drying stage, the moisture content distribution of the test materials became uniform, which was consistent with the model assumptions. Considering the changes in heating rate and temperature distribution, the accuracy of the model is good under the fiber saturation point, and it can be used to predict the high-frequency heating process of wood.
e-ISSN	19994907
DOI	10.3390/f9060327
Journal	Forests
Issue Number	6
Volume Number	9
Language	English
Publisher	MDPI AG
Publisher Date	2018-01-01
Publisher Place	Switzerland
Access Restriction	Open
Subject Keyword	Plant Ecology High-frequency Heating Wood Temperature Field Simulation Model
Content Type	Text
Resource Type	Article

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