基于ENVI-met的透水路面对微区域气候影响的模拟分析  

Simulation and Analysis on Influence of Permeable Pavement on Micro-region Climate Based on ENVI-met

作　　者：陈禹衡 冀超宇 黄力瑶 易军艳[1] CHEN Yu-heng;JI Chao-yu;HUANG Li-yao;YI Jun-yan(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin Heilongjiang Province 150000,China)

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150000

出　　处：《公路交通科技》2021年第6期46-53,共8页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51878229);黑龙江省交通运输厅科技项目(201902)。

摘　　要：为研究透水沥青路面及反射层涂装路面对夏季热岛效应和冬季极端低温的缓解作用,以哈尔滨某高校校园环境为研究对象,利用ENVI-met微区域气象模拟软件对完全不透水、10%空隙率透水、20%空隙率透水及涂装反射层的20%空隙率透水4种沥青混凝土路面铺装在夏冬2个季节不同温度条件下微区域气候的温度分布及变化情况进行了模拟分析。结果表明:在高温情况下,随透水沥青路面孔隙率增大,体积比热和导热系数降低,对热岛效应的缓解作用增强,表现为路面平均温度降低及局部高温区域的面积减少;在低温情况下,随透水沥青路面空隙率增大,对极端低温的缓解作用增强,表现为路面平均温度提高及局部低温区域的面积减少;在透水路面上加涂表面反射层,能显著提高透水路面的反射率,高温时能较好地减缓热岛效应,但会使极端低温的状况加剧;通过对微区域气候的改善作用,透水沥青混凝土路面能够对能源消耗起到一定降低作用,进一步减少碳排放,有利于对环境的保护。In order to research the mitigation of permeable asphalt pavement and reflective coating pavement on the heat island effect in summer and the extreme low temperature in winter,taking the campus environment of a university in Harbin as the research object,the temperature distributions and changes of 4 kinds of asphalt concrete pavements(completely impermeable,10%porosity permeable,20%porosity permeable and 20%porosity permeable with reflective coating)in the micro-regional climate under the conditions of different temperatures in summer and winter are simulated and analysed by using the ENVI-met micro-regional weather simulation software.The result shows that(1)at high temperatures,with the increase of the porosity of permeable asphalt pavement,the volumetric specific heat and thermal conductivity decrease,and the mitigation effect on the heat island effect enhances,which is manifested by the decrease of pavement average temperature and the decrease of the area of local high temperature region;(2)at low temperatures,with the increase of the porosity of permeable asphalt pavement,the mitigation on extreme low temperatures increases,which is manifested by the increase of average temperature of road surface and the decrease in the area of local low temperature region;(3)the reflective coating on the permeable pavement can significantly increase the reflectivity of the permeable pavement,it can slow down the heat island effect at high temperatures,but it will aggravate the extreme low temperature conditions;(4)through the improvement of micro-area climate,permeable asphalt concrete pavement can play a certain role in reducing energy consumption,further reducing carbon emissions,which is conducive to environmental protection.

关 键 词：道路工程 微区域气候 ENVI-met 透水路面 热岛效应 反射层 空隙率 

分 类 号：U416.22[交通运输工程—道路与铁道工程]