微波真空干燥过程中木材内部的温度分布

基金项目:

国家自然科学基金项目(59876005).

详细信息

Temperature distribution inside wood during microwave-vacuum drying

1. Material Science and Engineering School, Centra-l South Forestry Science and Technology University, Changsha, 410004, P. R. China;
2. College of Materials Science and Technology, Beijing Forestry University, 100083, P. R. China;
3. School of Engineering, Zhejiang Forestry College, Lin'an, 311300, P. R. China

摘要: 该文以马尾松木材为研究对象,对微波真空干燥过程中木材内部的温度分布进行了研究.结果表明在一定的辐射功率(160kW/m³)和厚度(60mm)范围内,木材内的温度分布比较均匀,基本不呈现出整体性的温度梯度;在干燥的后期,木材内温度分布的局部不均匀性有加大的趋势;在微波真空干燥过程中,木材内部的温度差是由于微波场和湿木材本身不同部位介电特性的差异引起的,这种不均匀性以局部的形式存在于木材中.
- 微波真空 /
- 木材 /
- 干燥 /
- 温度分布
Abstract: The law of temperature distribution inside wood using Pinus massoniana as experimental material had been researched during microwave-vacuum drying for the first time. The results showed that, with a certain scope of radiation power(160 kW/m³)and wood thickness(60 mm), temperature distribution inside wood was uniform, and there was not regular temperature gradient along the direction of wood thickness; the inner temperature difference of wood presented a growing trend in the last period of drying; during microwave-vacuum drying, inner temperature difference of wood was caused by microwave field and the differences of dielectric characteristics among different locations in wet wood, and this kind of non-uniformity existed locally in wood.
- microwave-vacuum /
- wood /
- drying /
- temperature distribution