Research Of Life Cycle Assessment Model For Electromechanical Products

Life Cycle Assessment (LCA) for electromechanical product is one of the advanced technologies in the green manufacturing field. It is also the key and general technology of green design and manufacturing. Nowadays, the demand of LCA technology is becoming stronger and stronger in China. However, compared with developed countries such as America, Japan and some European countries, there is still a considerable gap in the development of LCA technology and related softwares field. LCA softwares abroad can't adapt to the national conditions and Chinese manufacturing industry levels. The lack of systemic and accurate underlying LCA database, knowledge base and method base that is consistent with China's conditions has severely hindered LCA reasearch and application. Under this backgroud, LCA methods for electromechanical product and supportive tools have been mainly researched in this paper. It can provide necessary methods and data for the LCA development of China, and it can also provide data accumulation and case reference for LCA application.This paper mainly focuses on the following aspects based on the analysis of the research status at home and abroad on green design, LCA technologies and related softwares.(a) The definition and technical frame of LCA is illuminated. And the limits of current LCA research are pointed out. Then, the electromechanical product system model is built and its information is analysed combining with the characters of electromechanical products. On the basis of this model, environment properties of products in the whole life cycle are analysed. According to the environment impact factors, different stages of the whole life cycle are analysed and the environment factors identification table is built. Referring to this table, environment factors and obvious factors are identified. Finally, following the general steps of LCA methodology frame, specific LCA process and method on the electromechanical product is proposed.(b) Research status on LCA database at home and abroad is analyzed. And then, combining with the LCA methodology frame of products, the LCA database for electromechanical products that suits to Chinese conditions are studied, and a three-layer structure model of LCA database based on process is established. The conception structure design, analysis of object properties and logical structure design are carried out in accordance with the laws of database design.(c) Combining with the LCA method for the electromechanical products and the three-layer structure model of LCA database studied above. Visual Studio.NET (the integrated development environment) is selected as the development platform and B/S design-pattern as the development pattern. Then, the definition and function of MLCA system is analysed and the whole framework is designed following the LCA application steps that ISO 14040 defines. In this framework, the detailed design such as the definition of interfaces, the association with database and the implementation of interfaces is carried out using the technologies of C# and SQL Server. The operation interface of this system is finally designed on the basis of the general interface design rules.(d) Following the general steps of LCA, the life cycle assessment of Y80M 1-4-0.55 type motor is conducted using the MLCA system tools.