Techno-economic Study On The Energy Efficiency Transformation Of The Extant Residence Buildings

As social economy developing, energy shortage become urgent day by day .The architectural trade takes about 30% in our country's total energy consumption. So the energy efficiency in buildings has become an important issue for sustainable development in China. The key to achieve the energy efficiency target is the residential buildings because it occupies more than 60% of total building floor area. At present, most of our country's extant residence buildings become high energy consumption buildings and many new buildings become high energy consumption buildings when they are built up. So whether we can turn transformation into reality decides whether we can achieve the energy efficiency target. Now the transformation is carrying on largely. But because of the shortage of technology, money and other factors, the project goes slowly.This text summarizes the characteristic of the extant residence buildings and find out the reason why the transformation is going slowly on the foundation of the survey and analysis of these extant residence buildings. This text claims that the transformation work should be carried out in a plan and batch. We must adopt suitable technology and take the local climate into consideration .Meanwhile the text finished the economic analysis and assessment of the energy efficiency transformation work. During the study ,the text take the dynamic investment reclaim time as the assessment rule for the analytic model .The energy cost is calculated by the energy simulation software DeST-h .At last ,in order to validate the conclusion ,the text gives an example .Through the example we can see that energy efficiency can bring economic benefit also large social benefit.