【作者】 魏世雄；

【导师】 顾平道；

【作者基本信息】 东华大学 ， 供热、供燃气、通风与空调工程， 2006， 硕士

【摘要】 热通道玻璃幕墙的应用可以带来美轮美奂的建筑外形、舒适的室内环境及良好的节能效果,然而幕墙设计是个复杂的系统工作,需要综合考虑许多因素。要想能够准确的设计出适合当地气候特点的热通道玻璃幕墙,需要对热通道的节能特性有个全面的认识。由于热通道节能特性影响因素多且复杂,目前国内对这方面的研究还只是处于起步阶段,仅有的几篇文献,也是以介绍性为主,这限制了热通道玻璃幕墙在国内的大量应用。因此,有必要通过研究对热通道玻璃幕墙节能性有个全面的认识,一方面为工程设计人员提供参考,另一方面也可以为相关标准的制定提供依据。 本文依据CFD数值计算原理,借助Fluent模拟软件对单楼层热通道玻璃幕墙进行模拟研究。RNGκ-ε紊流模型被用来模拟热通道中空气的流动,经与国外文献上的实验数据相比较,模拟结果和试验结果基本吻合。在研究结构对幕墙性能的影响规律时,引入了正交实验法,分析了热通道高度、宽度、进风口高度及出风口高度对幕墙通风量及内层玻璃温度的影响规律。在设定参数范围内,得出热通道宽度和出风口高度是幕墙节能性能的最主要影响因素,影响规律为:热通道自然通风量随热通道宽度和出风口高度的增加而增大;内层玻璃温度随出风口高度的增加而减小,随热通道宽度的增加先显著减小,后缓慢增大,并且在宽度为0.2～0.3米时,内层玻璃温度最低。 文中还对热通道玻璃幕墙采取不同玻璃组合时的节能特性作了更多还原

【Abstract】 Double skin facades can bring beautiful architecture outline, comfortable indoor environment and good effect of energy saving. Nevertheless, the design of double skin facades is a complicated job which needs to consider many factors synthetically. If only we know its energy saving performance, we can correctly design a system of double skin facades meeting the local climate well. Because of the variety and complexity of its effect factors, the domestic study of double skin facades is still at the stage of start. The reference documents about it are not enough so that double skin facades are not widely used in our country. So it is necessary to know its performance of energy saving well by study, then we can provide reference to engineering designers and evidence for the establishment of the criterion concerned.FLUENT , the popular numerical simulation software, is used to study the single storey double skin facades according to the CFD(computational fluid dynamics) theory in this paper. RNG k-e model is used to simulate the air flow in the system of double skin facades and the CFD results are validated against experiment data from the foreign literature and very good agreement between the prediction and measurement is achieved. The experiment method of orthogonal design are used in this paper to analyze the effect law of its height, width, and the height of the inlet and outlet to cavity’s ventilation rate and the temperature of the inside glass. Within the setting range, a conclusion is made that double skin facades’ width and the outlet’s height is the main factor. Cavity’s ventilation rate rises as its width and the outlet’s height increases while the temperature of the inside glass drops as the outlet’s height increases, and first rises greatly then drops slowly as double skin facades’ widthincreases. And when the number of its width is between 0.2 and 0.3 metre, the temperature is the lowest.The performance of energy saving of double skin facades which use different glass is also shown in this paper. To single storey double skin facades, the optical property of glass greatly effects the performance of energy saving. If the choice of glass is not reasonable, it is likely to be overheated in the room when it is in the hottest summer. So the choice of glass is very important when designing double skin facades. This study also shows that when using heat-absorbing glass as the outside one and hollow glass which is constituted of Low-E reflection glass and common glass as the inside one in the hot summer area, the various performance of double skin facades are balanced and the effect of energy saving is the best.According to the study, a system of double skin facades which is suitable to use in the hot summer area is designed. The use of this system in transitional season and winter is studied by the method of simulation experiment. In the transitional season, we can choose the supply mode to heat the fresh air or provide natural ventilation to the room, or the exhaust mode to partly or fully use displacement ventilation. While in winter we can close the facades to form a close hollow to promote the its characteristic of heat insulation or use inside circulation ventilation mode to heat the air of the room. All these can save a lot of energy for architectures.(Heating, Ventilation and Air-conditioning Engineering) Supervised by ___________________更多还原