Vegetation plays a key role in improving wind environment of residential districts,and is helpful for creating a comfortable and beautiful living environment.The optimal design of vegetation for wind environment impro...Vegetation plays a key role in improving wind environment of residential districts,and is helpful for creating a comfortable and beautiful living environment.The optimal design of vegetation for wind environment improvement in winter was investigated by carrying out field experiments in Heqingyuan residential area in Beijing,and after that,numerical simulation with SPOTE(simulation platform for outdoor thermal environment) experiments for outdoor thermal environment of vegetation was adopted for comparison.The conclusions were summarized as follows:1) By comparing the experimental data with simulation results,it could be concluded that the wind field simulated was consistent with the actual wind field,and the flow distribution impacted by vegetation could be accurately reflected;2) The wind velocity with vegetation was lower than that without vegetation,and the wind velocity was reduced by 46%;3) By adjusting arrangement and types of vegetation in the regions with excessively large wind velocity,the pedestrian-level wind velocity could be obviously improved through the simulation and comparison.展开更多
城市住区空间形态复杂多样,不同形态下的住区室外热环境在时空维度上呈现出明显差异,而室外热环境品质直接影响居民的身心健康和建筑空调能耗。目前已有研究大多关注单一设计要素对住区热环境及热舒适度的影响,而本研究从建筑布局、建...城市住区空间形态复杂多样,不同形态下的住区室外热环境在时空维度上呈现出明显差异,而室外热环境品质直接影响居民的身心健康和建筑空调能耗。目前已有研究大多关注单一设计要素对住区热环境及热舒适度的影响,而本研究从建筑布局、建筑高度、开放程度三个方面,系统性探讨南方典型高密度住区的空间形态对室外热环境的综合影响。文中以深圳为代表性城市,根据局地气候区理论,以建筑密度、街巷高宽比、建筑高度、天空可视度等设计要素表征建筑布局、建筑高度、开放程度,从而提取两类密集型、两类开放型的典型真实住区形态。结合实测气象数据和计算模拟方法,通过对典型空间形态的住区热环境对比分析,揭示了空间形态设计要素对室外热环境的影响规律,其中,建筑高度是影响密集型住区热舒适度的关键指标,街巷高宽比和天空可视度则是影响开放型住区热舒适度的关键指标;研究进一步表明,现有四类典型住区室外空间均不能满足夏季热舒适需求,而仅从空间形态设计要素出发,无法实现昼夜住区热环境的同步改善,还需结合绿化、遮阳等设计策略。研究结果从室外热环境品质提升的视角,为南方高密度城市住区的规划与设计提供科学指引;可进一步集成于城市信息模型(City Information Model,CIM),为城市住区热环境评估、住区新建、更新改造等多种场景提供参考,也为CIM技术在建筑热环境优化决策中的应用奠定基础。展开更多
基金Project(50878111) supported by the National Natural Science Foundation of China
文摘Vegetation plays a key role in improving wind environment of residential districts,and is helpful for creating a comfortable and beautiful living environment.The optimal design of vegetation for wind environment improvement in winter was investigated by carrying out field experiments in Heqingyuan residential area in Beijing,and after that,numerical simulation with SPOTE(simulation platform for outdoor thermal environment) experiments for outdoor thermal environment of vegetation was adopted for comparison.The conclusions were summarized as follows:1) By comparing the experimental data with simulation results,it could be concluded that the wind field simulated was consistent with the actual wind field,and the flow distribution impacted by vegetation could be accurately reflected;2) The wind velocity with vegetation was lower than that without vegetation,and the wind velocity was reduced by 46%;3) By adjusting arrangement and types of vegetation in the regions with excessively large wind velocity,the pedestrian-level wind velocity could be obviously improved through the simulation and comparison.
文摘城市住区空间形态复杂多样,不同形态下的住区室外热环境在时空维度上呈现出明显差异,而室外热环境品质直接影响居民的身心健康和建筑空调能耗。目前已有研究大多关注单一设计要素对住区热环境及热舒适度的影响,而本研究从建筑布局、建筑高度、开放程度三个方面,系统性探讨南方典型高密度住区的空间形态对室外热环境的综合影响。文中以深圳为代表性城市,根据局地气候区理论,以建筑密度、街巷高宽比、建筑高度、天空可视度等设计要素表征建筑布局、建筑高度、开放程度,从而提取两类密集型、两类开放型的典型真实住区形态。结合实测气象数据和计算模拟方法,通过对典型空间形态的住区热环境对比分析,揭示了空间形态设计要素对室外热环境的影响规律,其中,建筑高度是影响密集型住区热舒适度的关键指标,街巷高宽比和天空可视度则是影响开放型住区热舒适度的关键指标;研究进一步表明,现有四类典型住区室外空间均不能满足夏季热舒适需求,而仅从空间形态设计要素出发,无法实现昼夜住区热环境的同步改善,还需结合绿化、遮阳等设计策略。研究结果从室外热环境品质提升的视角,为南方高密度城市住区的规划与设计提供科学指引;可进一步集成于城市信息模型(City Information Model,CIM),为城市住区热环境评估、住区新建、更新改造等多种场景提供参考,也为CIM技术在建筑热环境优化决策中的应用奠定基础。
