The Study of Eco-efficiency in the STN-LCD Manufacturing Plants
| Autor: | Shu-Yun Cheng, 鄭淑澐 |
|---|---|
| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 This study adapted the concept of life cycle assessment and investigated the environmental impacts associated with the STN-LCD manufacturing. It focused on the inventory of the raw material usage, electricity, water quantity, as well as the emission of pollutants during the manufacturing of STN-LCD products. The data, then, input into the models of Simapro 5.0 and Eco-indicator 99 to simulate the degree of impacts from the cradle to gate of the STN-LCD manufacturing. The results showed that in the gray STN-LCD production the impact scores are 0.026, 2.58, and 1.08 Pt/m2 for the stages of raw material transport, component processing, and assembly, respectively. For the color STN-LCD production, the relative scores are 0.032, 7.32, and 0.87 Pt/m2, respectively. To identify the environmental hot spots, we found that the highest impact occurred in the ITO platter unit for both products, which contributed 2.16 Pt/m2 and 2.37 Pt/m2 in gray and color STN-LCD products, respectively. The color filter preparation unit contributed 1.41 Pt/m2 and R-process unit contributed 0.76 Pt/m2. They are the other important hot spots in the color STN-LCD product. The overall impact scores for two products showed that color STN-LCD was higher than the gray one. In the analysis of eco-efficiency for two products, the estimation of gray STN-LCD was 145.07 NTD/Pt in average with the range of 133~202 NTD/Pt. for color STN-LCD, it was a litter higher. The average eco-efficiency was calculated as 200.84 NTD/Pt with the range of 172~229 NTD/Pt. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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