摘要(英) |
Based on the ISO 14064-1:2018 standard and the EPA′s guidelines, this study investigates the characteristics of green-house gas (GHG) emission from electronic manufacturing processes. It focuses on conducting a GHG emission inventory and quantification for an electronic manufacturing factory for the year 2021. The aim is to identify emission hotspots and assist the company in understanding its GHG emission, which is not only the foundation for reducing GHG emissions but also crucial for achieving net-zero emissions. The results show that in 2021, factory A had a total GHG emission of 54,091.71 metric tons of CO2e/year. Category 1 accounted for 1.35% of the total emissions and was mainly from refrigerants, fire extinguishers, septic tanks, and government vehicle fuel. Category 2 accounted for 11.22% of the total emissions and totally came from purchased electricity. Category 3 accounted for 0.12% of the total emissions and primarily came from transportation vehicles and business travel. Category 4 accounted for 2.25% of the total emissions and mainly came from upstream emissions of purchased goods and waste, wastewater disposal. Category 5 accounted for 85.07% of the total emissions and was primarily from the use of sold products. When comparing the GHG emission data of other companies in the same industry, it was found that indirect energy emissions accounted for over 90%. It is evident that the GHG emission in the electronic manufacturing industry mainly come from indirect energy emissions. Based on the inventory analysis, factory A has proposed six energy-saving and emission reduction strategies, which are expected to save a total of 1799.07 kWh/year of electricity and reduce GHG emission by 915.73 metric tons of CO2e/year. Among the energy-saving measures, the lowest carbon reduction benefit is the replacement of old LED lights in the office, mainly because LED lights have a higher cost and the difference in power consumption between the old and new models is not significant. The greatest carbon reduction benefit can be achieved by converting the air compressor to variable frequency control, which is effective in reducing GHG emission and has the highest carbon reduction benefit per unit investment cost. |
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