建筑立体绿化对室外热环境的影响分析

摘要

Taking a college library in Guangzhou as an example,the influence of building vertical greening to outdoor thermal environment was studied using CFD method,and the results showed the temperature on 1 .5 m height of building frontal square,the grassland and the river,reduced about 0.5 ~2.5 ℃,0.5 ~2.0 ℃ and 0.5~1 .5 ℃ respectively,and about 8 ℃ on the roofing surface on the summer typical calculation date compared before with after using the vertical greening.Vertical greening not only improves effectively the outdoor environ-ment,but also reduces the heat island effect,and outdoor and roofing temperature,and raises the roof insula-tion performance,and achieves the purpose of energy saving.%以广州某高校图书馆为例，利用 CFD 模拟方法对建筑立体绿化对室外热环境的影响进行模拟分析，结果显示：在夏季典型计算日，与普通建筑相比，采用立体绿化，建筑前广场、草地、河流上方1.5 m 处温度分别降低了0.5～2.5℃、0.5～2.0℃、0.5～1.5℃，屋面温度降低了8℃左右．采用立体绿化不仅有效改善了室外环境，减缓了热岛效应，而且降低了室外和屋面温度，提高了屋面隔热性能，达到了节能的目的．