Enhancing microwave heating uniformity using reconfigurable diffractive beamforming surface

2021 ◽  
Author(s):  
Daehyeon Kim ◽  
Minhyeock Kim ◽  
Youngno Youn ◽  
Suho Chang ◽  
Cheonga Lee ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Heating Uniformity

scholarly journals A new concept to improve microwave heating uniformity through data-driven process modelling

2019 ◽  
Author(s):  
Yingguang Li ◽  
Jing Zhou ◽  
Di Li
Keyword(s):  
Microwave Heating ◽  
Process Model ◽  
Influence Factor ◽  
Data Driven ◽  
Experimental Investigations ◽  
Microwave System ◽  
Long Time ◽  
Heating Uniformity ◽  
Heating Pattern

For a long time, the heating pattern of the workpiece within a multimode microwave oven was considered to be highly sophisticated. As a consequence, the uneven microwave heating problem can only be partly alleviated by a random movement between the electromagnetic field and the workpiece. In this paper, we reported that the heating pattern has a specific correspondence with microwave system settings. The influence factor of the heating pattern and the corresponding mechanism were systematically studied by both theoretical analysis and experimental investigations. On this basis, a data-driven process model was established to learn the material’s dynamic temperature behaviors under different microwave system settings, and a new concept to improve the microwave heating uniformity by temperature monitoring and active compensation was proposed. The effectiveness of the method was demonstrated by a polymer composite microwave processing case study.

Effect of the rotating metal patch on microwave heating uniformity

2018 ◽  
Vol 52 (2) ◽  
pp. 94-108 ◽  
Author(s):  
Qian Meng ◽  
Junqing Lan ◽  
Tao Hong ◽  
Huacheng Zhu
Keyword(s):  
Microwave Heating ◽  
Heating Uniformity

The impact of pins on dual-port microwave heating uniformity and efficiency with dual frequency

2020 ◽  
Vol 54 (2) ◽  
pp. 83-98
Author(s):  
Guichao Xiong ◽  
Huacheng Zhu ◽  
Kama Huang ◽  
Yang Yang ◽  
Zhipeng Fan ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Dual Frequency ◽  
Heating Uniformity ◽  
The Impact

Multi-physical simulation of stirring effect on heating uniformity in a microwave reactor with interlayer

2021 ◽  
pp. 1-46
Author(s):  
Pengcheng Zou ◽  
Guangyuan Jin ◽  
Guoyu Nie ◽  
Chunfang Song ◽  
Zhengwei Cui
Keyword(s):  
Heat Transfer ◽  
Power Consumption ◽  
Microwave Heating ◽  
Optimization Model ◽  
Physical Simulation ◽  
Nonuniform Heating ◽  
Microwave Reactor ◽  
Stirring Effect ◽  
Microwave Reactors ◽  
Heating Uniformity

Abstract Due to the exhaustion of fossil fuels and environmental degradation, biodiesel has attracted much attention as a new energy source. Currently, microwave reactors are used extensively for producing biodiesel. However, nonuniform heating of producing biodiesel in microwave reactors is a major problem. In order to solve the problem, a microwave reactor with an interlayer which can obviously improve the uniformity of microwave heating was designed. In this work, the heating efficiency and heating uniformity of the reactor were discussed from two aspects of waveguide position and interlayer thickness by means of multi-physical coupling calculation. According to the calculation results, the optimization model of a microwave reactor with an interlayer was obtained. Then, based on the above optimization model of a microwave reactor with an interlayer, a stirrer that can improve the heat transfer of the fluid material was introduced. The Maxwell equation, heat transfer equation and flow equation were coupled by multi-physical field simulation method to explore the influence of different factors of stirrer on power consumption and heating uniformity. Through response surface analysis, it was found that the primary and secondary order of stirring factors affecting microwave heating uniformity was stirring speed > impeller diameter > bottom clearance, and there was an interaction between different factors. From the two aspects of stirring power consumption and heating uniformity, the best stirring effect was obtained.

Hamburger Composition and Microwave Heating Uniformity

2006 ◽  
Vol 69 (7) ◽  
pp. 187-196 ◽  
Author(s):  
S. Ryynänen ◽  
P.O. Risman ◽  
T. Ohlsson
Keyword(s):  
Microwave Heating ◽  
Heating Uniformity

Continuous tubular microwave heating of homogeneous foods: evaluation of heating uniformity

2016 ◽  
Vol 50 (1) ◽  
pp. 43-65 ◽  
Author(s):  
Birgitta Wäppling Raaholt ◽  
Sven Isaksson ◽  
Lars Hamberg ◽  
Andreas Fhager ◽  
Yngve Hamnerius
Keyword(s):  
Microwave Heating ◽  
Heating Uniformity
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