Nonisothermal moisture movement in wood |
| |
| Authors: | Xianjun Li Biguang Zhang Wenjun Li Yanjun Li |
| |
| Institution: | (1) School of Industry, Central South Forestry University, Changsha, 410004, China;(2) College of Material Science and Technology, Beijing Forestry University, Beijing, 100083, China;(3) School of Engineering, Zhejiang Forestry University, Lin’an, 311300, China |
| |
| Abstract: | In order to analyze the effect of temperature gradient on moisture movement during highly intensive drying, such as microwave-vacuum
drying, the profile of the temperature and moisture content in sealed wood whose opposite faces were subjected to temperature
gradient for a short time was measured. The ratio of the moisture content (MC) gradient to the temperature gradient (dM/dT) was calculated and the factors influencing moisture movement under nonisothermal conditions were discussed. The results
indicate that moisture moved in wood from the warm surface to the cold one even if opposite faces of the sealed wood assembly
were exposed continuously to different but constant temperatures for a short period. The moisture content on the cold surface
was higher than that on the warm surface. The moisture content gradient opposite to the temperature gradient was established,
and the dM/dT was below 0.9%/°C. The temperature in the sample and the distance from the hot surface of the sample was strongly linearly
correlated. With an increase in temperature, initial moisture content and experimental time, the dM/dT was significantly increased.
__________
Translated from Journal of Beijing Forestry University, 2005, 27(2): 96–100 译自: 北京林业大学学报, 2005, 27(2): 96–100] |
| |
| Keywords: | nonisothermal moisture movement temperature gradient moisture content gradient wood |
| 本文献已被 SpringerLink 等数据库收录！ |
|
