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폴리에틸렌과 폴리스티렌의 사출성형공정에 대한 전과정목록분석
정종연(Jong Youn Jung),곽종명(Jong Myung Gwak),허탁(Tak Hur) 한국공업화학회 2000 응용화학 Vol.4 No.1
Along with the development of LCA methodology the construction of relevant databases are absolutely necessary for the efficient study of LCA. However, it is recognized that further development of LCA in Korea is currently limited by the lack of available life cycle inventory database on material, energy, process, transportation, and waste treatments. In an effort to solve this problem, the life cycle inventory databases for injection molding processes of polyethylene and polystyrene are established.
곽종명,이병국,전희동,허탁 ( Jong Myung Gwak,Byung Kook Lee,Hee Dong Chun,Tak Hur ) 한국공업화학회 1997 응용화학 Vol.1 No.1
Recently, Life Cycle Assessment(LCA) attracts public attention as one of the most widely used technical methods for evaluating environmental impacts associated with the life cycle of a product system. In this paper, a LCA study was carried out to access the environmental impact of a beverage can system throughout its entire life cycle. The life cycle of 250㎖ 2 piece-can is chosen as a product system to be studied, and 250 ℓ of beverage are defined as the functional unit. For Life Cycle Inventory Analysis(LCI), the process trees for the life cycle of 250㎖ 2 piece-can are constructed by connecting individual unit processes. Then, the life cycle inventory table for the present product system is established by identifying, quantifying, normalizing, calculating, and aggregating all the inputs and outputs related to each unit process based on the defined reference flow(1000 pieces of 250㎖-can). A number of inventory parameters identified in the inventory table are converted into environmental impacts by conducting Life Cycle Impact Assessment(LCIA), where classification, characterization, and valuation are carried out. It turns out that CO₂ is the most problematic emission throughout the life-cycle of steel can system and the use of electricity in the manufacturing stage of steel can is the biggest source for the total emissions associated. In particular, the electricity is responsible for about 22% of CO₂ emission which may cause the global warming effect.