Highly efficient microwave heating for target area based on metamaterial

Wu, Zhe; Deng, Bobo; Liu, Jianlong; Zhang, Baoqing

doi:10.1002/mop.30389

Cited by 14 publications

(6 citation statements)

References 22 publications

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“…where λ 0 is the free space wavelength of the microwave; ε r is the relative dielectric constant; tan δ is the loss angle constant; and c = 3 × 10 8 m/s. The heating depth is given by Equations (5) and (6):…”

Section: Microwave Frequencymentioning

confidence: 99%

“…Considering the deficiencies of traditional deicing methods, in the field of de-icing agents, people began to consider how to reduce harm to the environment and the main project, tending to adopt environmentally-friendly snow-removing agents [5]; in terms of snow-melting ice technology, researchers focused on the suppression of frozen pavements, thermal heating, energy conversion, and other new technologies for melting snow [6,7]. Among them, the road deicing technology using microwave heating for de-icing has been widely popularized and applied.…”

Section: Introductionmentioning

confidence: 99%

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Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

et al. 2018

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A method of deicing using microwave heating is proposed to make scientific and economical road deicing in a cold area, and to make up for deficiencies in the existing methods for melting snow and ice. This paper proposes to define microwave deicing efficiency as the heating rate of a concrete surface when heated to 0 °C (the efficiency of deicing is equal to the difference divided by heating time, which is between 0 °C and the initial temperature at the junction of ice and concrete). Based on the mechanism of microwave heating and deicing, a method combining the finite element simulation model with indoor experiments was proposed to study the deicing efficiency of microwaves, and the effects of different microwave frequencies and different road structure materials on microwave deicing efficiency were analyzed. The results show that the microwave frequency and road structure materials have a great influence on microwave deicing. For asphalt concrete, the ice melting efficiency of 5.8 GHz is 4.31 times that of 2.45 GHz, but the heating depth is less than that of 2.45 GHz. At 2.45 GHz, the melting efficiency of cement concrete is 3.89 times that of asphalt concrete. At 5.8 GHz, the melting efficiency of cement concrete is 5.23 times that of asphalt concrete. Through the consistency of the simulation and experimental results, the validity of the simulation model based on the finite element theory is verified. The results provide theoretical guidance and a practical basis for future applications of microwave deicing.

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Section: Microwave Frequencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

et al. 2018

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“…In general, different microwave absorbing abilities of concrete and ice layer are the key points for the microwave deicing method. 19…”

Section: Principles Of the Microwave Deicing Methodsmentioning

confidence: 99%

Investigations on microwave deicing effects on graphite-modified concrete

Liu

2017

RSC Adv.

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“…Yazdi et al designed a periodic array of meta-surfaces that exhibited perfect asymmetric light absorption from one side . Wu et al used a double-layer meta-surface with several microwave energies, thus improving the heating efficiency of the target area . Our past research has shown that a meta-surface featuring a periodic groove structure can enable microwave asymmetric propagation within a rectangle waveguide and effectively heat continuous fluids with varying dielectric constants .…”

Section: Introductionmentioning

confidence: 99%

“…24 Wu et al used a double-layer meta-surface with several microwave energies, thus improving the heating efficiency of the target area. 25 Our past research has shown that a meta-surface featuring a periodic groove structure can enable microwave asymmetric propagation within a rectangle waveguide and effectively heat continuous fluids with varying dielectric constants. 26 However, the high electric field intensity within the meta-surface grooves poses a risk of discharge breakdown under high power.…”

Section: Introductionmentioning

confidence: 99%

Continuous-Flow Microwave Reactor for High-Performance Heating of a Dynamic Chemical Reaction System

Yang,

Xia,

Tian

et al. 2023

Ind. Eng. Chem. Res.

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Continuous-flow microwave reactors find widespread application in chemical production. However, dynamic changes in the dielectric constant of reactants result in a low microwave energy efficiency. This paper reveals a circular waveguide developed using a meta-surface unidirectional propagation of microwaves. This waveguide was integrated into a continuous-flow heating system that efficiently heats materials with varying dielectric constants. A multiphysics model incorporating electromagnetic, fluid heat transfer, and chemical engineering has been built to analyze the microwave heating performance under different loads. Based on simulation and experimental findings, the meta-surface can achieve an energy efficiency of over 90% for loads with dielectric constants from 10 to 80. Moreover, a continuous-flow heating experiment conducted for biodiesel production indicated that meta-surfaces can enhance the heating efficiency by over a quarter. This research presents a promising approach toward efficient continuous-flow microwave heating, which can potentially revolutionize large-scale chemical production in industry.

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Highly efficient microwave heating for target area based on metamaterial

Cited by 14 publications

References 22 publications

Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

Investigations on microwave deicing effects on graphite-modified concrete

Continuous-Flow Microwave Reactor for High-Performance Heating of a Dynamic Chemical Reaction System

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