Thermoelectric field model of microwave hot in-place recycling for asphalt pavements

Sun Tong-sheng; Shi Jin-fei; Zhu Song-qing; Wang Hong-xiang; Zhang Zhi-sheng

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Sun Tong-sheng, Shi Jin-fei, Zhu Song-qing, Wang Hong-xiang, Zhang Zhi-sheng. Thermoelectric field model of microwave hot in-place recycling for asphalt pavements[J]. Journal of Traffic and Transportation Engineering, 2008, 8(3): 46-51.

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Sun Tong-sheng, Shi Jin-fei, Zhu Song-qing, Wang Hong-xiang, Zhang Zhi-sheng. Thermoelectric field model of microwave hot in-place recycling for asphalt pavements[J]. Journal of Traffic and Transportation Engineering, 2008, 8(3): 46-51.

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Thermoelectric field model of microwave hot in-place recycling for asphalt pavements

1.
School of Mechanical Engineering, Southeast University, Nanjing 211189, Jiangsu, China
2.
School of Electrical Engineering and Automation, Xuzhou Normal University, Xuzhou 221008, Jiangsu, China

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Author Bio:
Sun Tng-sheng(1981-), male, doctoral student, +86-25-52084852, suntongsheng@163.com

Shi Jin-fei(1964-), male, PhD, professor, +86-25-52090508, shijf@seu.edu.cn
Received Date: 2008-01-06
Publish Date: 2008-06-25

Abstract

Abstract

In order to improve the efficiency of radiation electric field and the distribution uniformity of temperature field in microwave heating for asphalt mixtures, the radiation field integrals of basic surface elements were computed, a mathematic model of radiation electric field for microwave heating device was built by using Huygens' principle, a mathematic model of temperature field for asphalt mixtures in front of radiation surface was established by using the law of energy conservation, and the influences of structure parameters and media physical properties on thermoelectric field were analyzed. The lengths of antennas in E-plane and H-plane were optimized by using the theories of antenna near-field radiation, microwave heating experiments were made for two kinds of antennas with different lengths in E-plane and H-plane, and the temperature fields were simulated. Simulation result indicates that the temperatures of asphalt mixtures in most regions are from 75 ℃ to 90 ℃ and decline slightly around the periphery when using the antenna in accordance with the length principle; however, the temperatures are over 130 ℃ in local regions and under 70 ℃ in most regions when using the other antenna. Obviously, the temperature field is more homogeneously and the heating efficiency is improved by using the former antenna, which demonstrates the accuracy of thermoelectric field model and the availability of structure optimization.
- pavement engineering,
- microwave hot in-place recycling,
- mathematic model,
- radiation field,
- temperature field,
- main lobe width

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References(10)

References

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