http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
공병욱,강성태,이연수,Gong, Byeong-Uk,Gang, Seong-Tae,Lee, Yeon-Su 재료연구소 2010 機械와 材料 Vol.22 No.2
석탄화력발전소의 효율향상은 스팀온도 및 압력의 증가를 통해 꾸준하게 이루어지고 있으며, 이러한 고효율의 화력발전은 사용 연료의 감소 뿐 아니라 $SO_x$, $NO_x$, $CO_2$ 등의 환경 가스배출을 감소시키는 효과도 있다. 이에 따라 운전조건을 고온, 고압화하려는 노력이 전 세계적으로 꾸준히 전개되고 있으며, 경제성 있고 높은 고온특성을 갖는 터빈 및 보일러 소재확보 여부가 발전소 건설 가능성을 결정하는 가장 주요한 요소 중 하나로 작용하고 있다. 본 고에서는 USC(Ultra Super Critical) 조건에 사용하기 위한 소재의 개발과정과 현대 사용되고 있는 다양한 발전용 고온소재의 특징에 대해 기술하고자 한다.
순천만 연안습지의 토양환경에 따른 염생식물의 분포 특성
공병욱,이원준,박명현,이우진,서하나,라덕관,정정조 한국환경기술학회 2019 한국환경기술학회지 Vol.20 No.1
The purpose of this study is to investigate the characteristics of soil environment of halophytes habitats and to provide information for restoration and management of halophytes in the Suncheon Bay. We investigated the characteristics of soil environment from August 2016. Specific conclusions derived from this study are as follows. Soil of Phragmites communis habitats was silty clay of muddy facies which are mixed with silt and clay. It was shown 54.8 % of water contents, 7.6 of pH, 15.8 psu of salinity and 28.8 mS/cm of electric conductivity. Organic matter, T-N and available phosphate of it were shown range of 5.8~9.8 %, 0.5~1.3 mg/g and 7.6~9.6 mg/kg, respectively. Habitats of Suaeda japonica was silty clay in common with Phragmites communis. It was shown 39.9 % of water contents, 7.2 of pH, and salinity and electric conductivity of it were relatively high as 18.1 psu and 33.7 mS/cm. Organic matter, T-N and available phosphate of it were shown range of 5.3~6.8 %, 0.6~0.8 mg/g and 7.7~8.5 mg/kg. Habitats of Scirpus planiculmis had similar environment of Phragmites communis, while Carex scabritolia was inhabited on sand of soil. Soil texture of non-vegetation was silty clay, and soil environment was shown similar condition to halophytes habitats in most items. But salinity and electric conductivity of it were highest as 26.9 psu and 48.4 mS/cm in surveyed area. The reason for it is that the influx of fresh water has an adverse environment and salt accumulation can be easily done due to the influence of seawater. For efficient management, restoration and conservation, improvement measures related to smooth circulation of fresh and sea water through topographic restoration will be needed.