Measuring Moisture Content of Wood Using a Transient Hot-Wire Technique

作者：Zhao, Jingyao; Cai, Yingchun^*

来源：BioResources, 2017, 12(1): 748-759.

DOI：10.15376/biores.12.1.748-759

• Hot wire
• Moisture content
• Uncertainty analysis
• Volumetric heat capacity
• Wood

Wood easily acquires a large amount of moisture when it is exposed to high-humidity conditions. The high moisture content influences the service life of wood. Thus, there is a need for an accurate, rapid, nondestructive, and simple measurement technique for wood's moisture content. This investigation proposes a method to measure the moisture content of wood by the wood volumetric heat capacity using a transient hot wire (THW) technique. The moisture content was inferred from the change of the volumetric heat capacity before and after the wood acquired moisture; the volumetric heat capacity is the ratio of the thermal conductivity to the thermal diffusivity. The results were validated by the gravimetric method, displaying good agreement, with discrepancies within 4%.

• 出版日期2017
• 单位东北林业大学