在国际上 ,工业、农业、交通运输业和建筑 ,均属于耗能大户 ,其中建筑能耗一般占国家总能耗的４０ %左右。建筑节能是指在建筑中合理使用和有效利用能源 ,不断提高能源利用效率。从广义来说 ,建筑能耗关系着国计民生。因此 ,建筑节能是一个国家技术水平与环保水平高低的重要标 In the international arena, industry, agriculture, transportation and construction are all large energy consumers, of which building energy consumption generally accounts for about 40% of the country’s total energy consumption. Building energy efficiency refers to the rational use and effective use of energy in buildings, and the continuous improvement of energy efficiency. In a broad sense, building energy consumption is related to national economy and people’s livelihood. Therefore, building energy efficiency is an important criterion for the level of a country’s technological level and environmental protection level.