建筑群布局对燃煤电厂周边CO_(2)分布特征的影响研究

Analysis of CO_(2)distribution characteristics around coal fired power plant under the influence of buildings layout

针对燃煤电厂碳排放量增加和城市低碳环保需求日益提高的矛盾,采用流体动力学(CFD)模拟技术对燃煤电厂及周边建筑群进行有限元建模,研究不同风速和烟囱高度影响下燃煤电厂周边CO_(2)含量的分布情况;并通过改变燃煤电厂周边建筑群的布局结构,研究建筑群布局对CO_(2)含量及速度场分布的影响。研究结果表明,当风速变大时,与碳排放源相距较近处的CO_(2)含量就会降低,而与碳排放源相距较远处的CO_(2)含量会增加;当燃煤电厂烟囱高度增加时,下风向地表相同高度的CO_(2)含量会呈现指数级下降;不同类型建筑群周边的CO_(2)含量不同,下降型和凸字型建筑群附近的CO_(2)含量较低,适合作为燃煤电厂下风向建筑群。

In view of the contradiction between the increasing carbon emissions of coal fired power plants and the increasing demand for urban low-carbon environmental protection,the fluid dynamics(CFD)simulation technology is used to study the distribution of CO_(2)content around coal fired power plants under the influence of different wind speeds and chimney heights by building finite element model of coal fired power plants and surrounding buildings,and study the influence of buildings layout on CO_(2)content and velocity field distribution by changing the layout structure of buildings around the coal fired power plant.The results show that when the wind speed increases,the CO_(2)content near the carbon emission source will decrease,while the CO_(2)content far away from the carbon emission source will increase;when the chimney height of the coal fired power plant increases,the CO_(2)content at the same height downwind to the surface will decline exponentially;the CO_(2)content around different types of buildings is different,the CO_(2)content near the descending-type and convex-type buildings is low,which is suitable for the downwind buildings of coal fired power plants.