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Abstract
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.
Highlights
The snow-icing phenomenon of roads is a common and urgent problem, which is serious in NorthAmerica, northern Europe, Russia, and northeast China
Microwave energy is absorbed as it passes through the material, and the ability to convert to heat
Microwave energy is absorbed as it passes through the material, and the ability to convert to energy is related to the microwave frequency
Summary
The snow-icing phenomenon of roads is a common and urgent problem, which is serious in NorthAmerica, northern Europe, Russia, and northeast China. The snow-icing phenomenon of roads is a common and urgent problem, which is serious in North. Countries generally use mechanical snow removal or a snow melting agent for melting ice [1]. The snow removal efficiency of traditional machinery is high, but most of them are only suitable for removing fresh snow that has not been roller compacted. The removal efficiency of thin or thicker ice accumulations on frozen road sections is not ideal, and the road surface is seriously damaged by forced eradication, resulting in additional costs for road maintenance [2,3]. Considering the harm of ice and snow in cold areas to road traffic and the defects of existing snowmelt ice methods, how to
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