A Study On The Life Cycle Assessment For Building's Water Supply And Drainage Systems

The choosen of building's water supply and drainage pipes is of great practical significance to building energy conservation. It was usually focused on functional performance, nonrecurring cost of pipes, and ignored the energy consumption difference on different pipes during the whole life cycle process. With the development of country, pipes have been used in large amounts. We should have to consider the energy consumption, resource consumption and environment impact of different building's water supply and drainage pipes at each stage of life cycle process. As a new environment impact assessment technique and method system, Life Cycle Assessment can be well applide to many kinds of building's water supply and drainage systems. The method of LCA can effectively analysis and compare the energy consumption of building's water supply and drainage pipes at each stage of their life cycle processes, and it is useful to biulding energy conservation design.The paper put forword a LCA model of building's water supply and drainage systems based on the technique transit and study status quo. The life cycle energy consumption of the two kinds of pipes (galvanized steer pipe, PVC-U pipe) which is usually used in buildings is calculated in an engineering case of residential building, and conceived the LCA system of building's water supply and drainage systems based on the model, inventory analysis, impact assessment, etc.On the grounding of study goal and scoping, the attainability and reality of datas, the paper put the life cycle of building's water supply and drainage systems to three stages, including construct, performance and backout. In the environment impact assessment, the paper established four systems of global warming, acidificed atmosphere, eutrophication and hydrophily toxicity. We can get the environment impact potencial of different types and the whole level by data processing, inventory analysis. Meantime identify the contribution of one environment impact type in different stage.Moreover, on the basis of the analysis result forward, the characteristic of energy and resources in China, For the purpose of reducing energy consumption, the paper thinks that we can optimize the building structure, and give suggestions to professional people in order to make decisions in the same condition which meets the building's water supply.