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1发展节能建筑是建筑业节能降耗的突破口我国现有建筑总量为430亿平方米,这些既有建筑能源利用效率低,节能效果差,单位建筑面积采暖能耗是发达国家标准的3倍以上。主要原因是建筑围护结构的保温性能不高,门窗气密性能差,外墙传热系数是发达国家的3～4倍,门窗为2～3倍,屋面为3～6倍,门窗空气渗透为3～6倍。结果很多还可再利用的余热、余冷都浪费掉了,造成了单位面积能耗居高不下。与气候相近的发达国家相比,我国绝大多
1 The development of energy-efficient building is a breakthrough in energy saving construction industry China’s existing building total 43 billion square meters, these existing buildings with low efficiency of energy use, energy-saving effect is poor, the unit area heating energy consumption is three times the developed countries standards the above. The main reason is that the thermal insulation performance of the building envelope is not high, the airtightness of the door and window is poor, the heat transfer coefficient of the external wall is 3 to 4 times that of the developed countries, the door and window are 2 to 3 times, and the roof is 3 to 6 times. For 3 to 6 times. The result is a lot of waste heat can be reused, I have been wasted cold, resulting in high energy consumption per unit area. Compared with the developed countries with similar climate, our country is vast