微波干燥室内的能量分布研究  

Distribution of Power Density in Microwave Drying Chamber

作　　者：董铁有[1] 

机构地区：[1]河南科技大学农业工程学院,河南洛阳471023

出　　处：《干燥技术与设备》2015年第4期35-39,共5页

基　　金：河南省自然科学研究基金重点项目(0211062000);教育部及河南省人事厅留学回国人员资助项目;河南省教育厅创新人才基金资助目

摘　　要：本文对典型载荷条件下微波干燥室的能量分布特性进行了研究。根据实验数据分析可知当具有较大的介电常数的物料均匀平铺在干燥床上时,微波干燥室内的能量分布可根据天线的辐射能分布瓣型来确定,而不应该以谐振腔对待。理论上,在微波干燥床上的XZ面内的θ=±24°50'50"范围内及YZ面内的θ=±36°2'40"范围内的微波功率密度大于该面内.最大微波功率密度的二分之一。解明了长期以来将微波干燥时看做谐振腔对待所带来的谬误。Distribution of microwave radiation power density on the drying bed in a typically structured microwave drying chamber was analyzed based on the antenna theory and experimental data. The results showed that, when material with a relatively large dielectric loss factor to be dried is spread fully over the drying bed in a drying chamber, which is the most common condition for large scaled microwave drying, the material on the drying bed will first absorb most of the radiation energy of the incident microwave from the mouth of the microwave guide connected with the drying chamber. The distribution of microwave radiation power density on the drying bed could be determined by analyzing the radiation pattern of the open-ended microwave guide.

关 键 词：微波 能量 分布 天线 干燥室 

分 类 号：TS255[轻工技术与工程—农产品加工及贮藏工程]