0引言与气候条件相近的发达国家相比,我国400多亿平方米的既有建筑普遍存在着围护结构保温隔热性和气密性差,供热空调系统效率低下等问题,节能潜力巨大。西方发达国家的建筑节能经验表明,必须一方面采取措施控制新建建筑的能耗水 0 Introduction Compared with developed countries with similar climatic conditions, over 40 billion square meters of existing buildings in our country generally have problems such as thermal insulation and air-tightness of the envelope and poor efficiency of heating and air-conditioning systems, which have great potential for energy saving. Building energy-saving experience in western developed countries shows that measures must be taken to control the energy consumption of new buildings