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승용차 냉방장치로부터의 온실가스 냉매인 HFC-134a 탈루배출모델에 대한 연구
김승도(Seungdo Kim),김순아(Suna Kim),김의건(i-Kun Kim) 한국대기환경학회 2012 한국대기환경학회지 Vol.28 No.5
The objective of this research was to develop fugitive emission models of HFC-134a (Hydrofluorocarbon-134a) at the operation and disposal stages of passenger cars. It is essential to estimate the emission of HFC-134a from mobile air conditioner (MAC) due to its high Global Warming Potential (GWP) and extensive use as a refrigerant in MAC. The first-order emission model was introduced and the emission rate constant was assumed to be unvaried with time. A commercial recovery station of refrigerants was used to recover the HFC-134a from the MAC. Average emission rate constant and annual emission rate during the operation period of vehicle are estimated to be 0.0538±0.0092 (n=21) yr<SUP>-1</SUP> and 5.2±0.6%, respectively within a confidence interval of 95%. According to the model results, about 50% of HFC-134a would be emitted from the MAC during the 10 years operation of passenger cars. On the other hand, average remaining portion of HFC-134a in the MACs of scrap cars is 58.2± 4.8% (n=50) within a confidence interval of 95%, suggesting that over 40% of the initially charged amount could be released fugitively after disposal provided that the HFC-134a would not be properly treated or recycled.
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연구논문 : 그린 ICT 정책의 문제점 및 개선방향에 대한 연구
김현경 ( Hyeon Kyeong Kim ),김승도 ( Seung Do Kim ),설성희 ( Sung Hee Seol ),김형준 ( Hyoung Jun Kim ),김용운 ( Yong Woon Kim ),임정일 ( Jeong Il Lim ) 한국환경정책학회 2010 환경정책 Vol.18 No.2
Recently, climate change has emerged as one of the biggest challenges that mankind should cope with. Many efforts to mitigate climate change have been made across nations, international organization, industries and individuals. Information and communication technologies(ICTs) have drawn attention because of their high potential application to mitigate and monitor the climate change. Many industrialized countries and industries have introduced green ICT strategies to tackle climate change problems. Korean government has also tried to pursue green ICT strategies in various perspectives. In this paper,we examine green ICT strategies in Korea and propose some directions for efficient and comprehensive green ICT strategies based on the analysis. While Korea has world-class ICT manufacturing industries and outstanding ICT infrastructure, ICT services industries are weak. Low utilization of ICT in business leads to poor productivity, and besides, this prevents the expansion of green ICT into whole economy and society. Another problem is that the green ICT strategies are sometimes overlapped and inconsistent since they are independently established in various government departments. Strong leadership is needed to establish and carry out consistent and efficient green ICT strategies. In addition, implementation of reliable national GHG inventory and increasing ICT application through the activation of ICT services industries are urgently needed.
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