Improving wind environment design based on assessing spatial distribution of ventilation efficiency in regional space
Improving wind environment design based on assessing spatial distribution of ventilation efficiency in regional space
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DOI：
10.1016/j.egypro.2017.12.418
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发表时间：
2017-12
期刊：
影响因子：
--
通讯作者：
Wei You;Jialei Shen;Wowo Ding
中科院分区：
文献类型：
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作者：
Wei You;Jialei Shen;Wowo Ding
本文探讨了设计变量对理想居住建筑群通风效率空间分布的影响。采用计算流体力学（CFD）模拟方法，研究了建筑长度和间距变化的一系列设计案例。采用换气次数（ACH）和吹扫流量（PFR）作为通风效率的评价指标。模拟结果表明，这些设计变化对空间通风效率的分布有明显的影响。增大建筑间距可以提高不同空间的通风效率。然而，该益处并不是随着间隔距离的增加而线性提高的。当距离大于15m时，空间通风效率的改善程度明显降低。建筑长度的变化对空间通风效率的分布也有影响。随着建筑长度的增加，进入南北楼之间空间的风减少，导致中间单元的通风量减少。初步研究表明，建筑长度应控制在5个住宅单元以内。
This paper discusses the influence of design variations on spatial distribution of Ventilation Efficiency (VE) in idealized residential building groups. Series of design cases referring building length and spacing changing are investigated using Computational Fluid Dynamics (CFD) simulation method. Air change rate (ACH) and purging flow rate (PFR) are adopted as evaluation indices of ventilation efficiency. Simulation results indicate that these design changes have evident effects on distribution of spatial ventilation efficiency. Widening building spacing could improve ventilation efficiency of different spaces. However, the benefit is not linear improved as spacing distance increases. When the distance is higher than 15m, improving extent of spatial ventilation efficiency decreases evidently. Variations of building length also has effect on distribution of spatial ventilation efficiency. As building length increase, less wind could reach into space between south and north buildings, which lead to the decrease of wind ventilation for middle residential-unit. Preliminary study indicates that building length should be restricted within 5 residential-unit.