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现阶段,我国既有建筑面积已经超过500亿m2,建筑能耗约占社会总能耗的30%。大部分既有建筑受到当时建设技术和经济条件的限制,30%~50%既有建筑出现安全失效或功能退化,室内环境质量较差,严重影响人居安全和工作生活品质;与此同时,我国建筑在使用阶段的碳排放占自身全寿命周期碳排放总量的80%~90%,普遍能效较低,碳排放居高不下。庞大的既有建筑存量加之存在的诸多缺陷,成为建筑领域节能减排工作,甚至我国社会可持续发展需要解决的重大难题。与城市开发过程中大规模拆旧城、建新城运动造成的资源衰竭、环境恶化等问题相比,对量大面广的
At this stage, China’s existing building area has exceeded 50 billion m2, and building energy consumption accounts for about 30% of the total social energy consumption. Most existing buildings are limited by the construction technology and economic conditions of the time. 30% -50% of the existing buildings have failed in safety or function, the indoor environment quality is poor, which seriously affects the safety of living and the quality of work and life. At the same time, China’s construction phase of the use of carbon emissions account for its own life-cycle carbon emissions 80% to 90% of the total, generally lower energy efficiency and high carbon emissions. The huge existing building stock, combined with many existing defects, has become a major problem to be solved in energy conservation and emission reduction in the field of construction and even in the sustainable development of our society. Compared with the large-scale demolition of the old city in the process of urban development, the depletion of resources caused by the construction of the new city and the deterioration of the environment,