Design and application of double curtain wall

Solve the fire hazard: the closed double curtain wall has no air circulation channel between floors, and it is unnecessary to consider the fire protection requirements of the ordinary double curtain wall in the installation of alarm and spray system between floors. The details of fire prevention design are the same as the ordinary unit curtain wall, so as to reduce the fire prevention cost of curtain wall. Permanent free maintenance: through the sealed cavity filling the air supply system after dry purification air, air pressure is higher than indoor and outdoor air pressure in the body cavity, sealed air cavity without the risk of condensation, no dust deposition, makes the airtight air cavity in curtain wall the whole life cycle maintenance free, save the air circulation channel of traditional double curtain wall cleaning fee, The closed double curtain wall in the human resources are expensive in Europe and North America and other economically developed countries more promotion value. High utilization rate of indoor area: because the sealed cavity is clean, there is no need to add maintenance channel opening fan, and no need to reserve cleaning and maintenance space. The indoor space occupied by the maintenance facilities of curtain wall air circulation channel in the original building is completely planned as effective use area, which improves the indoor use area rate. Cost and economy: The cost of closed double-layer modern curtain wall is about 1.25-1.4 times that of ordinary unit curtain wall, while the cost of traditional double-layer curtain wall is about 1.5-2.0 times that of ordinary unit curtain wall. Moreover, it has the product characteristic of permanent maintenance free. In the service life cycle of the building, its comprehensive cost has the advantages of energy saving and environmental protection. The core design concept of closed double curtain wall structure is not only the narrow structure of curtain wall and the long life of closed cavity design, but also the core design points to ensure the realization of the opposition between the two. The main design points are as follows: the sealed cavity temperature control and data accumulated in the body: due to the airtight chamber air heat due to the accumulation of sunlight, its working temperature is higher than normal double curtain wall facade, all regions, due to the different latitude of sunlight intensity is different, the highest temperature in an airtight cavity is different also, sustained high temperature have higher demands for the durability of curtain wall materials, Examples include the thermal stress of glass, and the durability of sprayed coatings at high temperatures under ultraviolet radiation. Therefore, it is necessary to collect and sort out the temperature data of each area before the promotion of sealed double layer products in order to get the best design scheme.