The Economic Evaluation of the External Wall Insulation Structure Based on the Life-cycle

At the present, the problem of energy crisis plaguing various countries in the entire world. China is also facing the huge challenges between energy supply and demand serious imbalances. The energy saving problem has become a hot social issues, which has received widespread attention. The key of building energy conservation is to reduce building energy consumption. The energy-saving of building enclosure is the key part of building's energy-saving. In China, it vigorously promotes the use of energy-saving building envelope materials at the same time. But it is also facing the large investment cost of insulation materials. This paper established the life-cycle economic evaluation model on the theory of life-cycle, analyzed it by using the theory of technical economics. Thus it can draw the conclusion: the use of energy-saving materials on building enclosure can not only reduce the building energy consumption, but also reduce the life-cycle cost of the construction.