冷陰極管產業導入溫室盤查系統之研究

Introduction of Greenhouse Gases Inventory System in a Cold Cathode Fluorescent Lamp Manufacturer

楊雅妃(Ya-Fei Yang)

指導教授 ： 吳庭年

崑山科技大學/工程學院/環境工程研究所/碩士(2010年)

https://doi.org/10.6828/KSU.2010.00106

摘要

因溫室效應的影響致使近年來全球氣溫不斷升高，世界各國關注溫室氣體的排放減量，推動氣候變化綱要公約與京都議定書的簽訂。台灣的溫室氣體排放量為全世界第16位，雖礙於國際政治的國家定位，台灣無法参與京都議定書的跨國際減量機制，但掌握台灣的溫室氣體排放量仍屬必要。面板產業為台灣近年重點發展產業，冷陰極管是面板主要的光源之一，著眼於掌握溫室氣體排放量為執行產業溫室氣體減量的第一步，本研究乃依ISO/CNS 14064標準來建立冷陰極管產業(CCFL)溫室氣體盤查作業程序，並擇一冷陰極管製造廠進行盤查案例研究。
本研究案例盤查結果，96年度的溫室氣體排放量為6,520.972公噸CO2e，依ISO/CNS 14064定義：範疇1-直接溫室氣體排放量為117.210噸CO2e，佔總排放量的1.797%、範疇2-能源間接排放量為6,403.762公噸CO2e，佔總排放量的98.203%、範疇3-其他間接能源排放量因在數據方面收集有困難度與高度的不確定性，目前以定性盤查為主。京都議定書管制的六種溫室氣體，盤查結果發現CO2的排放量為6,516.800公噸CO2e，佔整體的99.936%、CH4排放量為42.970公噸CO2e，佔整體的0.063%、N2O排放量為0.065公噸CO2e，佔整體的0.0001%；HFCs、PFCs、SF6排放量甚少，可予以忽略。
本研究另依英國標準組織、英國環境、食品與鄉村事務部與碳信託基金會所共同研擬之PAS 2050標準，導入冷陰極管產業以評估各項產品與服務所產出溫室氣體。本研究邊界設為B2B(Business to Business)，針對不同尺寸面板冷陰極管產品之碳排放量進行計算：20吋監視器之冷陰極管碳排放量為1,516.8 gCO2e/台、在液晶電視產品之冷陰極管碳排放量方面，26吋的碳排放量為4,071.6 gCO2e/台、32吋的碳排放量為8,820.0 gCO2e/台、42吋的碳排放量為15,112.8 gCO2e/台。
比對北部某面板廠完整的生命週期產品碳足跡，42吋液晶電視產品之碳排放量為213 kgCO2e/台，本研究計算之42吋冷陰極管製程產品碳足跡的碳排放量僅為15.1 kgCO2e/台，推估冷陰極管碳排放量約佔液晶電視產品的7.1%。

關鍵字

溫室氣體 ； 冷陰極管 ； 溫室氣體盤查

並列摘要

Global warming becomes more serious due to the effect of green house gases (GHGs). The reduction of GHG emissions has drawn much attention among the nations around the world, and thus Climate Change Convention and the Kyoto Protocol were signed and ratified to tackle global warming problems. The GHG emissions of Taiwan ranks 16th in the world; however, Taiwan cannot participate international GHG reduction mechanisms under the Kyoto Protocol due to the global political issues. The understanding of national GHG emissions is essential for the Taiwan government, and the understanding of GHG emissions is also the first step of implementing GHG reduction for an industrial manufacturer. TFT-LCD is a growing industry in Taiwan recently, and cold cathode fluorescent lamp (CCFL) is the major backlight source for TFT-LCD. This study is to build the GHG inventory system in CCFL industry according to ISO/CNS 14064 standard, and one CCFL manufacturer is selected as case study to illustrate the understanding of GHG emissions in the company basis.
The inventory result showed that GHG emission is 6,520.972 tons-CO2e for the study case in 2007. Following the definition in ISO/CNS 14064 standard, GHG emission of the study case is further divided into 117.210 tons-CO2e (1.797%) for direct GHG sources in scope 1, 6403.762 tons-CO2e (98.203%) for energy indirect GHG sources in scope 2, and not quantified other indirect GHG sources in scope 3. Based on the sorting of 6 regulated GHGs in the Kyoto Protocol, GHG emissions are 6,516.800 tons-CO2e (99.936%) for CO2, 42.970 tons-CO2e (0.063%) for CH4, 0.065 tons-CO2e (0.0001%) for N2O, and trace amounts for HFCs, PFCs, and SF6.
This study also applied PAS 2050 standard to evaluate carbon footprint for CCFL products. Due to the limitation of available data, the boundary of carbon footprint is set as business to business (B2B). Varied size and number of CCFL products were used to assemble diverse end manufactured goods including monitors and LCD TV products, and thus GHG emissions for each CCFL product were calculated accordingly. GHG emissions for CCFL products are 1,516.8 gCO2e/set for 20” monitor, 4,071.6 gCO2e/set for 26” LCD TV, 8,820.0 gCO2e/set for 32” LCD TV, and 15,112.8 gCO2e/set for 42” LCD TV.
Adapted carbon footprint data of life cycle analysis from one TFT-LCD manufacturer, GHG emission for 42” LCD TV product is 213 kgCO2e per set. In this study, the calculated GHG emission for CCFL product used in 42” LCD TV is 15.1 kgCO2e/set that only accounts for 7.1% of GHG emissions in life-cycle carbon footprint of 42” LCD TV product.

並列關鍵字

green house gases ； cold cathode fluorescent lamp ； GHG inventory

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