微波真空干燥过程中木材内部的温度分布  

Temperature distribution inside wood during microwave-vacuum drying.

作　　者：李贤军[1] 张璧光[2] 李文军[2] 李延军[3] 

机构地区：[1]中南林业科技大学材料科学与工程学院 [2]北京林业大学材料科学与技术学院 [3]浙江林学院工程学院

出　　处：《北京林业大学学报》2006年第6期128-131,共4页Journal of Beijing Forestry University

基　　金：国家自然科学基金项目(59876005).

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/m^3)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.The law of temperature distribution inside wood using Pinus massoniana as experimental material had been researched during mlcrowave-vacuum drying for the first time. The results showed that, with a certain scope of radiation power（ 160 kW/m^3 ）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.

关 键 词：微波真空 木材 干燥 温度分布 

分 类 号：S781.71[农业科学—木材科学与技术]