Analysis of multi-physical field characteristics in a microwave reactor with a mode stirrer

被引：0
|
作者：
Zou P. [1 ]
Jin G. [1 ]
Li Z. [1 ]
Song C. [1 ]
Han T. [1 ]
Zhu Y. [1 ]
机构：
[1] Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, School of Mechanical Engineering, Jiangnan University, Wuxi
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 1600年 / 41卷 / 05期
关键词：
Biodiesel; Heating uniformity; Microwave reactor; Mode stirrer; Moving grid; Multi-physical field simulation;
D O I：
10.16085/j.issn.1000-6613.2021-1123
中图分类号：
学科分类号：
摘要：
As a new energy source, biodiesel has attracted widespread attention. Microwave heating is widely used to produce biodiesel due to its high efficiency. However, the non-uniform heating of microwave is the main problem that needs to be solved urgently. So, a mode stirrer was introduced into a microwave reactor with an interlayer, and the multi-physics field simulation of microwave heating process was carried out by coupling the Maxwell and heat transfer equations with COMSOL software. The arbitrary Lagrangian-Eulerian method was used to deal with the mode stirring, and the influence of different mode stirrer parameters on the microwave heating characteristics was discussed. The results showed that compared with the microwave heating model without mode stirring, the electric field distribution in the material was changed at all times by mode stirring, thus improving the heating efficiency and heating uniformity. With the increase of the height and length of the mode stirrer, the material average temperature and coefficient of variation (COV) showed a downward trend on the whole. The average temperature of material increased linearly with the increase of stirring speed, and COV showed an overall upward trend with the increase of stirring speed. Through response surface analysis, it was found that the primary and secondary order that affected the average temperature and COV was: stirrer height > stirrer speed > stirrer length, where the interaction between the stirrer height and the speed had a significant effect on the average temperature. Considering the average temperature and COV, the best stirring conditions obtained by response surface optimization were stirrer height λH of 0.164, stirrer length λB of 0.31, stirring speed N of 30r/min, COV of 0.11×10-2, and average temperature of 22.15℃. © 2022, Editorial Board of CIESC Journal. All right reserved.
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页码：2301 / 2310
页数：9
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