【作者】 李玲燕；

【导师】 周志华；

【作者基本信息】 天津大学 ， 供热、供燃气、通风及空调工程， 2008， 硕士

【摘要】 呼吸式玻璃幕墙外形通透,具有较好的隔音效果,受到越来越多的使用单位和建筑师的青睐,但是在实际应用中存在着片面强调玻璃幕墙的装饰作用而忽视其热工性能和通风效果的现象,这势必会造成对能源和社会资源的巨大浪费,更不利于玻璃幕墙建筑的健康发展。本文以寒冷地区呼吸式玻璃幕墙为研究对象,结合天津市实际工程,采用实验的方法研究了不同工况下呼吸式玻璃幕墙的夹层温度及室内、外温度的变化规律和彼此间的关系。并借助CFD模拟分析了影响呼吸式玻璃幕墙夏季通风的因素。本文主要研究了夏季和过渡季节、晴天和阴天、幕墙呼吸式和非呼吸式、不同朝向、不同高度、有遮阳措施和无遮阳措施、夏季空调开启和关闭等工况下夹层温度和室温的变化情况。实验结果表明:无论在何种工况下,白天不同高度不同朝向的夹层温度均高于室外温度;同一朝向的夹层温度和室温都随着夹层高度的增加而升高。消除室外温度的影响后,过渡季节的夹层温度高于夏季,晴天高于阴天,幕墙非呼吸式高于呼吸式,无遮阳高于有遮阳,空调关闭高于空调开启。另外,采用CFD模拟研究了不同进风口风速、不同夹层宽度及不同夹层高度对夹层温度和风速的影响情况。结果表明:室外迎面风速越大越有利于夹层内的热量被及时带走,降低夹层温度,当自然通风不能满足要求时应采取机械通风的方式;当进风口风速一定时,夹层宽度不同或高度不同时对夹层温度的影响也不同,夹层太宽通风效果不好,夹层太高易出现过热现象。因此,在设计幕墙时应对不同进风口风速、不同夹层宽度和高度情况进行综合研究以确定最合理的通风方案。更多还原

【Abstract】 Breathing-type glass curtain wall’s outward shape is transparent, and it has good noise-insulated effect. It has received more and more favor from construction units and architects. However, in practical applications, there are one-sided emphasis on the decoration to ignore thermal performance and ventilation effect. So that it will result in huge wastes of energy and social resource.The thesis studies the Double-Skin glass curtain wall of a practical project in Tianjin in cold region. The experiments study the relationship of interlayer temperature, indoor and outdoor temperature under different conditions. CFD simulation analyses the impact factors of ventilation of breathing glass curtain wall in summer.This thesis studies the change ruler of interlayer and indoor temperature under different conditions, summer and transition season, sunny and cloudy day, the walls of breathing and non-breathing, different orientations, different heights, shade and no shade, air-conditioning of open and close.The results showed that: under different conditions, during daytime, interlayer temperature of different heights and orientations is higher than outdoor temperature; interlayer and indoor temperature increase with interlayer’height. After eliminating the impact of outdoor temperature, interlayer temperature of transitional season is higher than summer, sunny day than cloudy day, non-breathing than breathing, no shade than shade, air conditioning of close than open.Additionally, CFD simulates different inlet speeds, different interlayer’width and height. The results showed that: the greater the air speed is, the lower the interlayer temperature is, when natural ventilation can’t meet the requirements, mechanical ventilation should be taken. When the speed is same, different widths or heights have different impacts on interlayer temperature. Too wide interlayer takes poor ventilation, too high will take overheated phenomenon. Therefore, before design, different speeds, widths and heights should be simulated to choose right design plan.更多还原