城市商业步行街中水体对热环境的影响研究——以洛阳市为例

Study on the Influence of Water Body on Thermal Environment in Urban Commercial Pedestrian Street——A Case of Luoyang

本文以商业步行街为研究区域,使用计算机模拟软件ENVI-met对夏季室外热环境进行模拟分析并得出结论。模拟城市微气候尺度下空气温度、相对湿度及风速三个衡量参考因素,通过运算PMV值对室外人体舒适度做出评价。经模拟研究发现,随着水体覆盖率的增加,热环境有明显改善,当覆盖率达到60%时,改善效果达到最佳状态,且距离水体边界3 m之外改善效果逐渐减弱。此外,研究还发现水体对风速的改变程度较小,影响不大。

This paper takes the commercial pedestrian street as the study area,uses computer simulation software ENVI-met to simulate the summer outdoor thermal environment for analysis and draws conclusions.By simulating the air temperature,relative humidity and wind speed under the microclimate scale of city,the outdoor human comfort is evaluated by calculating the PMV value.The simulation results show that the thermal environment is improved obviously with the increase of water coverage,the improvement effect reaches the best state when the coverage rate reaches 60%and then the improvement effect is gradually weakened 3 meters away from the water boundary.In addition,it is found that water body has little effect on the change of wind speed.