垂直百叶对典型办公建筑自然通风及室内热环境影响研究

发布时间：2018-06-02 02:13

本文选题：自然通风 + 垂直百叶倾角　；参考：《安徽建筑大学》2015年硕士论文

【摘要】：我国建筑能耗占全年总能耗的30%左右,且随着经济技术的发展,建筑能耗比例仍在增加。同时,人们对建筑室内环境质量的要求也越来越高。自然通风是一种传统技术,它的优点在于既降低能耗,又为室内带来良好的空气环境。在这个迫切需要降低能源消耗、节约资源以及提高人们所处室内环境质量的时代,对建筑自然通风的研究显得尤为重要。本文通过大量的文献调研,发现自然通风是一种能够改善建筑室内环境的传统技术。很好的利用自然通风,不仅能为人们带来舒适感,同时还节约能源。由于建筑需要采用遮阳系统,遮阳构件对自然通风影响较大。因此,本文重点研究垂直百叶对建筑自然通风以及室内热环境的影响。以安徽合肥地区为例,首先利用建筑热平衡原理、自然通风量计算原理,计算出合肥地区全年可利用自然通风小时数,分析该地区自然通风潜力。通过对合肥地区典型办公建筑的调研,找出本文研究的目标建筑。所选建筑为一栋三层办公楼,以其中一间办公室为研究对象。该办公室单体房间模型尺寸为6.0m×4.0m×3.6m,北面设有一个门M(尺寸:1.0m×2.1m),南面设有两个窗C1、C2(尺寸:1.5m×1.8m),窗墙比为0.25,窗地比为0.225。室内布置有一个办公桌,三把办公椅,一个沙发,一个书柜,两个茶几,两个盆栽。在自然通风潜力较大的条件下,通过改变垂直百叶倾角和百叶宽度来设置工况,采用PHOENICS计算流体力学软件以及ECOTECT软件进行仿真模拟分析。结果表明:(1)通过对合肥地区自然通风潜力的计算,在其他条件都相同的情况下,随着建筑围护结构得热量的增加,自然通风潜力降低;(2)随着百叶倾角θ从15°到165°的增大,室内各点风速呈波形变化,且波峰值与波谷值差值逐渐变小;(3)当θ=90°时,即来流风风向与垂直百叶呈45°夹角时,室内涡流区域面积最小,气流组织均匀性最好;(4)随着百叶间距d从0.1m到0.3m的增大,室内各点风速值呈波动变化;(5)在规定其他条件不变的情况下,随着百叶间距的增大,室内形成的穿堂风区域逐渐向出风口偏移;(6)垂直百叶的使用能够在一定程度上提高室内环境热舒适度。当采用垂直百叶时,全年总不舒适度比无垂直百叶时降低约2500度小时(Deg Hrs)。
[Abstract]:Building energy consumption in China accounts for about 30% of the total energy consumption in the whole year, and with the development of economy and technology, the proportion of building energy consumption is still increasing. At the same time, people to the building indoor environment quality also more and more high request. Natural ventilation is a traditional technology, which has the advantages of reducing energy consumption and bringing good indoor air environment. In this era, it is urgent to reduce energy consumption, save resources and improve the quality of indoor environment, so it is very important to study the natural ventilation of buildings. Through a lot of literature research, it is found that natural ventilation is a traditional technology which can improve the indoor environment of buildings. Good use of natural ventilation, not only for people to bring comfort, but also save energy. Because the building needs to adopt sunshade system, sunshade component has great influence on natural ventilation. Therefore, this paper focuses on the impact of vertical louvers on natural ventilation and indoor thermal environment. Taking Hefei area of Anhui Province as an example, the natural ventilation hours can be used in Hefei area in the whole year, and the potential of natural ventilation in this area is analyzed by using the principle of building heat balance and the calculation principle of natural ventilation quantity. Through the investigation of typical office buildings in Hefei area, the target buildings of this paper are found out. The selected building is a three-story office building, one of which is the object of study. The model size of the single room is 6.0m 脳 4.0m 脳 3.6m. there is a door M (size: 1.0m 脳 2.1mg / m) in the north and two windows (size: 1.5m 脳 1.8m / m) on the south side. The ratio of window to wall is 0.25 and the ratio of window to floor is 0.225.The model size of the single room is 6.0m 脳 4.0m 脳 3.6m. The interior is furnished with a desk, three office chairs, a sofa, a bookcase, two coffee tables and two potted plants. Under the condition of high natural ventilation potential, the working conditions were set by changing the vertical shutter inclination and the width of the shutters, and the PHOENICS computational fluid dynamics software and the ECOTECT software were used to simulate and analyze the working conditions. The results show that by calculating the natural ventilation potential in Hefei area, under the same conditions, the natural ventilation potential decreases with the increase of the heat value of the building enclosure structure.) with the increase of the inclination angle 胃 from 15 掳to 165 掳, the natural ventilation potential decreases with the increase of the heat value of the building enclosure. The wind speed at each point in the room changes in waveform, and the difference between the peak value and the trough value gradually becomes smaller. When 胃 ~ (90) 掳, that is, the angle between the wind direction of the incoming wind and the vertical louver is 45 掳, the area of the indoor eddy current region is the smallest. With the increase of the distance d from 0.1m to 0.3m, the wind velocity values of each point in the room fluctuate with the increase of the distance between the hundred lobes under the condition that other conditions are fixed, and with the increase of the distance between the blinds, the distribution uniformity of the air flow is the best. The use of vertical louvers can improve the thermal comfort of indoor environment to a certain extent. When the vertical leaf was adopted, the total uncomfortableness of the whole year was about 2500 degrees lower than that without the vertical 100 leaf, and the total uncomfortableness of the whole year was about 2500 degrees lower than that without the vertical leaf.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU834.1

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