【作者】 钱发；

【导师】 李百战； 刘猛；

【作者基本信息】 重庆大学 ， 供热、供燃气、通风及空调工程， 2011， 硕士

【摘要】 能源危机的爆发及建筑高能耗为传统玻璃幕墙的使用带来了空前的压力,然而双层皮玻璃幕墙(Double Skin Fa?ade,简称DSF)的出现为建筑师们提供了另外一种选择,其优越的美学性能、隔声性能和采光性能使其深受建筑设计师们的喜爱。另外一个方面,与传统玻璃幕墙及其他围护结构相比,DSF的使用增强了围护结构对气候变化的适应性,同时改变了建筑自然通风的利用策略及建筑室内热环境等。本文从DSF通风性能角度,分别对1)DSF与房间之间未设置风口,2)DSF与房间之间设置风口两种情况:DSF内及与其相连房间内通风情况、室内热环境、空气品质、空调能耗进行了深入的分析和探讨。本文首先运用理论分析方法,通过建立经验计算公式,深入研究分析了热压和风压作用下DSF自然通风的作用原理,建立热压作用下自然通风量和风压作用下DSF外表皮压力经验计算公式。然后,以重庆某新建DSF建筑作为工程案例,分别在冬季(2月)和夏季(7月)对其DSF内通风情况、温度及室内热环境进行现场测试,分析测试结果,发现该工程案例DSF设计合理及不合理的地方。最后,运用动态流体模拟软件(CFD)Airpark,以该工程案例为载体,选取7月25日为代表日,从DSF内及室内通风情况、室内空气品质的角度,对其进行模拟研究,根据研究结果提出了DSF设置措施;运用能耗模拟软件EnergyPlus,以该工程案例为载体,选取7月25日为代表日,从室内空调能耗角度,对其进行模拟研究;利用能耗模拟软件EnergyPlus烟囱效应模块,当DSF与房间设置风口时,深入研究分析了风口尺寸对空调能耗的影响。DSF内通风性能受到室外风向分布、室外风速、DSF风口设置及DSF朝向的影响。根据重庆气象特征,针对通风性能而言,西北向为DSF设置的最佳朝向。DSF在夏季降低室内温度及控制室内温度作用明显,夏季室外温度达到37℃时,室内内热源较小的情况下,DSF可调控室内温度到30℃以下,且室内温度集中在25℃~30℃,并未随室外温度的变化而变化。提高DSF内风速不仅可以迅速移走DSF内得热量,同时还能增加DSF太阳辐射得热量,减少与其相连房间太阳辐射得热量。当DSF与房间设置风口时,DSF及室内通风情况和室内空气品质受DSF开口设置影响较大,且DSF烟囱效应和建筑空调能耗都受到该风口尺寸的影响。更多还原

【Abstract】 In recent years, the architects have a great deal of interest in double-skin facades ( DSF ) due to the advantages claimed for this technology in terms of energy saving, aesthetic, daylight, protection from external noise. Comparing to the traditional glass curtain wall, the double-skin fa?ade is more suite for the change of the climate. It improves the natural ventilation utilized and the indoor thermal environment. This article study how natural ventilation can be utilized in the DSF and the room, 1) when there have no openings between DSF and the room, 2) when there have openings between DSF and room.Firstly, this paper takes the theoretical analysis method to analyses the flow action principle of DSF by the stack effect and the wind pressure, and has established the experience formula of ventilation rate for DSF by stack effect and the out-skin pressure of DSF by wind pressure. Then, experiments have been performed, to a new building with DSF in February and July in Chongqing, which is taken as project case. The results obtained from the experiments and analysis, indicate that there are some design problems for the DSF of the building in winter. At last, simulations have been performed, to the project case. CFD software is used to analyses the flow of the DSF and the room, the indoor air quality. Energyplus is used to analyses the energy consumption of the building without DSF and with DSF.The flow of the DSF is influenced by the outdoor wind direction distribution, outdoor wind speed, the opening of the DSF and the direction of the DSF. According the weather in Chongqing, as for the ventilaton, the best direction for the DSF is northwest. The DSF have good ability for reducing the indoor temperature and controling the indoor temperature, and it can control the indoor temperature to 25℃~30℃for the building with low internal heat, when the outdoor temperature is 37℃. Improving the speed of the flow is not only removing the heat gain of the DSF quickly, but also increase the solar radiation heat gain of the DSF, so that it can reduce the solar radiation heat gain of the room which with the DSF. The opening of the DSF influences the flow of the room and the DSF, but also the air quality of the room, when there have opeenings between DSF and room. The flow of the DSF can be improved by change the opening of the DSF, and the energy consumption of the building with DSF also can be reduced. The stack effect of the DSF and the energy consumption of the building are both influenced by the size of the openings between the DSF and the room.更多还原