低辐射中空玻璃对办公建筑能耗的影响

透明围护结构对建筑能耗有重要影响,其中窗墙比和玻璃类型是重要影响因素。本文针对不同气候区条件下典型城市的办公建筑,采用不同镀膜位置的低辐射中空玻璃,应用EnergyPlus能耗模拟软件,分别考虑外窗方位和窗墙比变化情况下,计算房间的制冷能耗、供暖能耗和综合能耗。结果表明：随着窗墙比增大,制冷能耗均增大,窗在南侧房间供暖能耗均减小；哈尔滨外窗在南向时采用A型玻璃更佳,其他方位采用C型玻璃更佳,广州、南京和北京外窗均采用B型玻璃更佳；广州、南京、北京窗在西侧采用B型玻璃且窗墙比为0.7时综合节能率最大,值分别为20.0%、19.2%、15.4%,哈尔滨窗在东侧采用C型玻璃且窗墙比为0.7时综合节能率最大,值为9.6%。

Influence of low emissivity double-layer insulating glass on energy consumption of office buildings

Transparent envelope has important impact on building energy consumption, among which window-wall ratio and glass type are important factors. In this paper, low emissivity double-layer insulating glass with different coating position and considering the change of orientation of windows and window-to-wall ration,EnergyPlus software as the simulation tool to calculate the energy consumption for cooling, heating and total of office buildings. The results indicate that with the increase of window-to-wall ratio ,the energy consumption of cooling increased in different climate zones,while the heating decreased in the south window room.It is more applicable to use A type of glass in south-facing facade and C type of glass in other three orientation for Harbin, while use B type of glass are more suitable for other three city.The total building energy consumption of Guangzhou, Nanjing and Beijing respectively when B type glass is used on the west window and the window-to-wall ratio is 0.7 reduced by 20.0, 19.2, 15.4% and when C type glass is used on the east window and the window-to-wall ratio is 0.7 reduced by 9.6% in Harbin.