寒冷地区某既有办公建筑围护结构优化改造研究

既有公共建筑能耗中,围护结构节能潜力巨大。以兰州某既有办公建筑为例,采用DeST-C软件模拟围护结构不同材料厚度、窗型,得出系列负荷,通过对数据分析、比较,得出如下结论:外墙外保温适宜材料为50mm的挤塑板,最大热负荷节能率为45.66%;屋面适宜保温材料为65mm的挤塑板,最大热负荷节能率为4.25%;外窗各个朝向全部更换玻璃,推荐选用内张膜中空玻璃(双膜),最大热负荷节能率为7.36%;单独更换南向外窗材料,推荐选用真空镀膜复合中空玻璃,最大热负荷节能率为1.78%。

Research on the Optimization and Transformation of the Envelope of an Existing Office Building in Cold Area

Among the energy consumption of existing public buildings,the envelope has great potential for energy conservation.Taking an existing office building in Lanzhou as an example,DeST-C Ssoftware was used to simulate different material thickness and window type of envelope structure to obtain a series of loads.Through data analysis and comparison,the following conclusions were drawn:the suitable material for external insulation of external wall was extruded panel with 50mm,and the maximum energy saving rate of thermal load was 45.66%.Roof suitable insulation material is 65mm extruded board,the maximum heat load energy saving rate is 4.25%;All the faces of the exterior Windows should be replaced with glass.Inner tensioned insulating glass(double membrane)is recommended.The maximum energy saving rate of thermal load is 7.36%.It is recommended to use vacuum coated composite insulating glass.The maximum energy saving rate of thermal load is 1.78%.