微波干燥过程中不同物料的干燥效率研究  

Drying Efficiency of Different Materials During Microwave Drying

作　　者：吴慧栋 孙铜生[1] 凌方庆 WU Huidong;SUN Tongsheng;LING Fangqing(School Of Mechnical Engineering,Anhui Polytechnical University,Wuhu 241000,China)

机构地区：[1]安徽工程大学机械工程学院,安徽芜湖241000

出　　处：《安徽科技学院学报》2021年第6期99-105,共7页Journal of Anhui Science and Technology University

基　　金：安徽省高校自然科学研究重大项目(KJ2020ZD38)。

摘　　要：为研究微波干燥时不同物料对电磁场的影响,依据电磁波传播特性,使用COMSOL Multiphysics软件对微波真空干燥箱干燥稻谷与小麦时的场分布进行模拟,观察频率为2.45 GHz、功率为600 W环境下,微波干燥不同物料时腔体内部的电磁场与耗散功率的差异以及水分浓度差异,并以实验验证结果,发现物料特性对微波场以及干燥效率的影响规律。结果表明物料的介电常数、密度等属性对实现最佳干燥效果存在显著影响,介电常数较大的物料对于微波能的吸收具有更大优势的正确性,对后续食品干燥研究提供指导意义。In order to study the influence of material dielectric properties on electromagnetic field during microwave drying, the field distribution of microwave vacuum drying box was 2.45 GHz, at 600 W, the difference between electromagnetic field and dissipation power and different material drying rate, simulation results and the influence of material dielectric properties on microwave field and drying efficiency were studied. The results show that the material dielectric constant has a significant effect on the optimal drying effect, and the materials with large dielectric constant are more correct for the absorption of microwave energy, and it provides guiding significance for the subsequent food drying research.

关 键 词：微波干燥 介电特性 耗散功率 物料属性 干燥效率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]