| Summary: | 碩士 === 國立交通大學 === 工學院永續環境科技學程 === 102 === With the energy depletion and global warming problems have become serious problems, research and development on alternative energy have attracted considerable attention all over the world. The CIGS(Copper Indium Gallium Selenide) thin-film solar cells is the most potential in photoelectric industry in recent years. This study intends to assess the EPIs (Environmental Performance Indicators) for a CIGS thin-film solar cell industry based on references of different industries. Several potential programs for improving the environmental performance of the company were suggested based on the EPIs evaluation. And the EPIs results were compared with those made by TFT-LCD (TFT-LCD，Thin Film Transistor Liquid Crystal Display) industry.
Based on the data of 2012~2013 and compared with TFT-LCD industy, the nagative EPIs included energy comsumption, water comsumption, waste production greenhouse gas emission and waste recovery rate. Compared with 3.5-generation plants which was close to the EPIs. But if based on estimated full capacity index value, they could be better than those of the TFT-LCD industry. The results also showed that waste recovery rate was the best to reach high performance. The toxic substance (thiourea), ammonia nitrogen, greenhouse gas, hydrogen sulfide and ammonia showing a positive downward trend with increased capacity. The discharge ratio of total factory can be in compliance with the Science Park standard. But the system reclaim ratio of process and reclaim ratio of total factory need to be improved. While the rate of recovery of the waste water increases, the discharge ratio of total factory reduces. The scope 2 of greenhouse gas is the largest source of carbon emissions. Hence the high-energy-consuming equipment should be directed to energy saving improvements.
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