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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.
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