352-不同的外呼吸式玻璃幕墙宽度对热通道内空气流动特性影响的数值模拟研究.pdfVIP

不同的外呼吸式玻璃幕墙宽度对热通道内 空气流动特性影响的数值模拟研究 张艺 1，刘泽勤∗ （冷冻冷藏技术教育部工程研究中心，天津市制冷技术重点实验室，天津商业大 学机械工程学院，天津 300134） 摘要：本文以某大厦的外呼吸式玻璃幕墙为例，利用CFD软件模拟不同的幕墙宽度对热 通道内空气流动特性的影响进行数值模拟研究，以250mm为单位幕墙宽度从500mm增加到 1500mm。通过模拟发现热通道内的流线随着宽度的增加变得越来越杂乱，通道内空气的平均 流速也从4m/s左右降到了1m/s左右。由此得出，在设计安装外呼吸式玻璃幕墙时，在满足所 需功能前提下应尽量减小热通道的宽度，以提高热通道内的空气流速、增加换热效率、以及 减少玻璃幕墙的建筑能耗。 关键词：玻璃幕墙；流场；空气流动特性；换热效率；建筑能耗 Numerical Simulation Study on the Influence of Different Width of External Breathing Glass Curtain Wall on Air Flow Characteristics in the Thermal Passage ZHANG Yi , LIU Ze-qin （Engineering Center of the Ministry of Education of Refrigeration Technology, Key Laboratory of Tianjin Refrigeration Technology, College of Mechanical Engineering，Tianjin University of Commerce, Tianjin 300134 ） Abstract: In this paper, an external breathing glass curtain wall of a building is taken as an example to simulate the influence of different curtain wall width on the air flow characteristics in the thermal passage by using CFD software. The width of the curtain wall is increased from 500 mm to 1500 mm in units of 250 mm. It is found by simulation that the streamline in the thermal passage becomes more and more cluttered with the increase of the width, and the average flow rate of the air in the thermal passage also decreases from about 4 m/s to about 1 m/s. It is concluded that when designing and installing an external breathing glass curtain wall, the width of the thermal passage should be reduced as much as possible on the premise of satisfying the required functions, in order to increase the air flow rate in the thermal passage, increase the heat exchange efficiency, and reduce the building energy consumption of the glass curtain wall