北京林业大学学报2012，Vol.34Issue(2)：133-136,4.
木材超声波-真空协同干燥的动力学研究
Preliminary study of wood ultrasound-vacuum combined drying dynamics.
摘要
Abstract
Combined with the advantages of ultrasound drying and vacuum drying, Juglans mandshurica Maxim was dried by ultrasound-vacuum combined drying method at different drying temperatures, absolute pressures, ultrasound power and frequency conditions. The water effective diffusion coefficient during drying process was measured, and the drying dynamics model was also established. The results showed that the value of the water effective diffusion coefficient increased along with the increasing temperature, while absolute pressure had little effects on the water effective diffusion coefficient during the ultrasound-vacuum drying process; temperature had significant effects on drying rates; the variation trends of drying rates versus time were approximate at the same temperature and different absolute pressure conditions; the drying model, which was established based on the effective diffusion coefficient equation and the Fick＇s unidirectional diffusional equation, was approximate to the practical drying dynamics.关键词
超声波/木材真空干燥/水分有效扩散系数/干燥速率Key words
ultrasound/wood vacuum drying/water effective diffusion coefficient/drying rate分类
农业科技引用本文复制引用
何正斌,郭月红,伊松林,张璧光..木材超声波-真空协同干燥的动力学研究[J].北京林业大学学报,2012,34(2):133-136,4.基金项目
国家自然科学基金项目（30871978）. （）
