高层办公建筑内风廊对自然通风贡献的模拟分析与评价

为研究内风廊在高层办公建筑自然通风中的作用,本文利用CFD软件对合肥地区某高层办公建筑在有无内风廊工况下室内通风情况进行数值模拟分析。通过研究室内气流速度和空气龄来分析高层办公建筑内各功能房间的通风换气情况和整体的通风效果。研究结果表明,风廊能有效促进室内空气流通,提高空气质量和舒适度,同时也对降低室内温度、减少空调使用等方面具有重要作用。因此,当设计高层办公建筑时,合理布局和设计风廊是必要的。

潮汐与广州园池

从谢兰生《常惺惺斋日记》及格雷夫人的家信中关于潮汐与游园的记载出发,着重探究潮汐与广州园池之间的关系,分析广州历代园林沿水系分布的七条主要线索,深入解读历史文献和图像中的内城喻园、花地馥荫园、河南潘家花园、荔枝湾海山仙馆、西关长寿寺花园和伍家花园等代表性园林因应潮汐而出现的双池与多池、窦口、池间堤、堤边树、垂直池壁与拦河、高架廊道和池上楼馆等现象,以及其中蕴涵的海山想象。认为潮汐对广州园池的择址、布局、立意、理景、造屋、栽植和游赏都产生了深刻的影响,并由此形成了依水筑园、跨波构基、高树深池、风廊水殿和真海仙山等“惟岭南园林得之”的重要特色。

Study on Spatial and Temporal Distribution Characteristics of Wind Energy Resource and Preservation in Central and West Hexi Corridor

[Objective] The aim was to explore the spatial and temporal distribution characteristics of wind energy resource and preservation in central and west area of Hexi Corridor. [Method] By dint of the wind speed data from 1955 to 2007 in ten meteorological observation station in central and west area of Hexi Corridor,and special wind tower fine data from January to December in 2007,the distribution and reserves of the region＇s wind energy resources were studied. [Result] The results showed that environmental wind speed was relatively stable in central and west Hexi Corridor. There were no distinct changes in climate characteristics distribution. There were regional differences in the distribution of wind energy,and there was a large numerical area of wind energy in Gazhou County and Yumen City; Wind energy in the region generally was higher. The wind energy density was above 100 w/m2 in the 10 m layer,around 140 w/m2 in most places,and was more than 200 w/m2 in the large number area. The wind grew in vertical direction along with the linear growth of height. Each 10 m high wind increased to 15 w/m2 averagely,50m layer wind energy was greater than the general 240 w/m2 and there were obvious changes on daily and annual with wind energy in central and west area of Hexi Corridor. The duration from March to May was a wind energy-intensive stage,10m height from the ground in the wind around 10：00 in low-value. After growing from 11：00,it met the day largest number at 18：00,and then reduced gradually. Effective wind speed hours in the region in general were more than 6 200 h,and the value in the large areas was close to 7 600 h. [Conclusion] The study laid basis for the development and application of wind energy in central and west area of Hexi Corridor.

风环境分析在城乡规划中的应用——以北京新机场项目为例

城市风环境关系到居民的身体健康与舒适,污染物的扩散与空气自净,建筑节能减排等多方面问题。本研究在中观层面对风环境进行分析,基于空间分析的地表粗糙度及最小成本路径法,建立了一套模拟预测中观尺度区域城市的风廊道分布的评估方法,并结合北京新机场项目进行了实际应用。该方法讨论了城市型态及布局对于风廊道规划设计的影响,实现了风环境与城市规划的有机结合,对未来城乡规划等中观尺度的规划起到示范作用。