电热型融雪沥青路面传热特性研究

doi:10.13229/j.cnki.jdxbgxb20210671

摘要/Abstract

摘要：

为研究电热型融雪沥青路面传热特性及其影响规律，采用有限元方法建立了二维传热模型，分析了发热系统设计参数（布设间距、埋设深度、输入功率）以及环境因素（风速、环境温度）对路表温度分布和升温速率的影响，并通过试验段实测数据验证模型的准确性和有效性。结果表明：二维传热模型可以很好地预测电热型融雪沥青路面路表温度值，平均最大绝对误差为1.1 ℃，平均精度为88.1%，最大精度为96.6%；在发热系统设计参数及外界环境等影响因素中，布设间距是影响路表温度均匀性的主要因素，其次是埋设深度；输入功率和环境因素主要影响电热型融雪沥青路面温度升温速率和最大温度值。

关键词: 道路工程, 融雪路面, 数值模拟, 传热模型, 设计参数, 环境因素

Abstract:

A two-dimensional heat transfer model was established using the finite element numerical simulation approach to investigate the heat transfer characteristics and its influence law of electric heating snow-melting asphalt pavement. The impact of heating system design parameters（layout spacing， embedding depth， and input power） and environmental parameters（wind speed， ambient temperature） on surface temperature distribution and heating rate of the pavement was investigated， and the accuracy and effectiveness of the model are verified by the measured data of the test section. The results revealed that the two-dimensional heat transfermodel can predict road surface temperature of electrothermal snowmelt asphalt pavement well in an accurate level， with an average maximum absolute error of 1.1 °C， an average accuracy of 88.1%， and a maximum accuracy of 96.6%. Among all the factors， layout spacing is the most important factor affecting the temperature uniformity of the road surface， followed by embedding depth. Input power and environmental factors mainly affect the temperature rising rate and the maximum temperature of electrothermal snowmelt asphalt pavement.

Key words: road engineering, snowmelt pavement, numerical simulation, heat transfer model, design parameters, environmental factors

中图分类号:

U421.4

刘状壮,张有为,季鹏宇,Abshir Ismail Yusuf,李林,郝亚真. 电热型融雪沥青路面传热特性研究[J]. 吉林大学学报(工学版), 2023, 53(2): 523-530.

Zhuang-zhuang LIU,You-wei ZHANG,Peng-yu JI,Abshir Ismail Yusuf,Lin LI,Ya-zhen HAO. Study on heat transfer characteristics of electric heating snow melting asphalt pavement[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(2): 523-530.

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参数名称	数值
热导率/［W·（m·K）^-1］	1.24
密度/（kg·m^-3）	2420
恒压热容/［J·（kg·K）^-1］	900
长度/cm	30
高度/cm	8

模块	精度/%	最大绝对误差/℃
平均值	88.1	0.7
模块1	95.6	0.2
模块2	91.3	0.6
模块3	86.8	0.8
模块4	73.4	1.1
模块5	85.3	0.9
模块6	96.6	0.5
模块7	88.6	0.9
模块8	93.0	0.7
模块9	75.5	1.1
模块10	94.5	0.6