国家游泳中心围护结构节能分析

国家游泳中心(水立方)采用双层ETFE气枕围护结构,在薄膜上镀有银点,通过调整薄膜的层数和镀点密度,优化不同围护结构部分的传热系数和遮阳系数,同时通过对围护结构空腔部分采取机械通风来降低夏季室内冷负荷。通过模拟软件对围护结构被动式太阳能利用、自然采光、空腔通风、自然通风等进行了节能分析计算,并将实际建筑与根据相关标准建立的参照建筑进行了全年能耗模拟比较,结果表明这种围护结构节能效果显著。

Energy Saving analysis of building envelope of National Swimming Center

The building envelope system of National Swimming Center (Water Cube) comprises of a series of ETFE paneled units that are mounted as internal and external skins. The number of ETFE layers and the density of frits painted on ETFE are designed differently to optimize the heat transfer coefficient and shading coefficient. Meanwhile, mechanical ventilation is utilized within the cavity of the building envelope to reduce cooling load in summer. Using a simulation software, simulates and analyses the energy saving effects of passive solar gain, day-lighting, cavity ventilation and natural ventilation of this building envelope system. Simulates and compares annual energy consumption between the Water Cube and a reference building set up by the relevant standard. The result shows that the energy saving effect of this building envelope system is significant.