http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
신재생발전 확대적용을 위한 ESS와 천연가스발전기의 경제성 평가
주용진,신주곤,서동균,박세익,JOO, YONGJIN,SHIN, JUGON,SEO, DONGKYUN,PARK, SEIK 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.4
This paper considers the alternative way to mitigate cost for REC instead of Photovoltaic (PV) panels with Energy Storage System (ESS). This study starts from an economic analysis of a 1 megawatt PV system without ESS. Several assumptions have been applied in consideration of the current domestic situation. Based on this result, the economic efficiency of PV with ESS improved. However, the reliance on government subsidies was very high. The alternative way to cover the fluctuation power from renewable energy was reviewed with economical and technical way. In case the natural gas engine applied to PV, the IRR and Levelized Cost of Electricity (LCOE) can be improved without ESS. And if small amount of additional REC, the IRR can be improved up to investment level.
상용급 가스터빈에서 셰일가스 파일럿비 영향에 관한 수치해석적 연구
서동균,주용진,박세익,김미영,신주곤,Seo, Dong Kyun,Joo, Yong-Jin,Park, Seik,Kim, Mi-yoeng,Shin, Jugon 한국전력공사 2019 KEPCO Journal on electric power and energy Vol.5 No.3
논문에서는 상용급 가스터빈을 대상으로 해서 셰일가스를 연료로 공급할 때 유동 및 연소특성을 3-D 수치해석적 방법으로 구하였다. 이 때, Standard k-e 난류모델, 2단 메탄산화반응, Finite rate/Eddy dissipation 반응모델, DTRM 복사모델이 사용되었고, 기준조건(도시가스, PR 0.07)에서 출구 측에서 형성되는 온도는 이전 문헌 값과 비슷한 값을 보였다. 위 모델을 바탕으로 해서 연료조건으로 기존의 도시가스 외에 세 가지 셰일가스 조건(도시가스 대비 열량기준 80%, 90%, 105%)을 선정하였고, 각 연료조건에 대하여 세 가지 연료분사조건(PR=0.7, 0.9, 0.11)에 대한 해석을 수행하였다. 해석결과, 모든 셰일가스 연료공급 조건에 대하여 도시가스 대비 온도 혹은 NOx 측면에서 연소안정화를 만족하였다. 또한 모든 조건에 대해서 PR이 증가할수록 출구측 평균온도는 일정했지만 NOx량은 증가하였다. 이는 파일럿비가 증가할수록 상대적으로 확산연소가 증가했기 때문이다. In this work, the flow and combustion characteristics using a 3-D numerical simulation was evaluated for a shale gas fueled combustor in a commercial class gas turbine. The Standard k-e turbulence model, 2 step methane oxidation mechanism, Finite rate/Eddy dissipation reaction model, DTRM radiation model were employed and validated well at the baseline condition (Natural Gas, Pilot Ratio 0.2). Based on the validated models, the combustion characteristics of shale gas was evaluated for three pilot ratios cases. It was found that NOx concentrations for all shale gas cases were less than the that for city gas, which imply that, at the selected PRs, the condition for combustion stability is satisfied. In addition, for higher PR, whereas the average temperatures at the exit are the same, the NOx increases. It means that diffusion combustion portion increases due to the higher PR.
A rapid antimicrobial susceptibility test based on single-cell morphological analysis
Choi, Jungil,Yoo, Jungheon,Lee, Mincheol,Kim, Eun-Geun,Lee, Ji Soo,Lee, Seungok,Joo, Seik,Song, Sang Hoon,Kim, Eui-Chong,Lee, Jung Chan,Kim, Hee Chan,Jung, Yong-Gyun,Kwon, Sunghoon American Association for the Advancement of Scienc 2014 Science Translational Medicine Vol.6 No.267
<P>A rapid antibiotic susceptibility test (AST) is desperately needed in clinical settings for fast and appropriate antibiotic administration. Traditional ASTs, which rely on cell culture, are not suitable for urgent cases of bacterial infection and antibiotic resistance owing to their relatively long test times. We describe a novel AST called single-cell morphological analysis (SCMA) that can determine antimicrobial susceptibility by automatically analyzing and categorizing morphological changes in single bacterial cells under various antimicrobial conditions. The SCMA was tested with four Clinical and Laboratory Standards Institute standard bacterial strains and 189 clinical samples, including extended-spectrum β-lactamase–positive <I>Escherichia coli and Klebsiella pneumoniae</I>, imipenem-resistant <I>Pseudomonas aeruginosa</I>, methicillin-resistant <I>Staphylococcus aureus</I>, and vancomycin-resistant <I>Enterococci</I> from hospitals. The results were compared with the gold standard broth microdilution test. The SCMA results were obtained in less than 4 hours, with 91.5% categorical agreement and 6.51% minor, 2.56% major, and 1.49% very major discrepancies. Thus, SCMA provides rapid and accurate antimicrobial susceptibility data that satisfy the recommended performance of the U.S. Food and Drug Administration.</P>
( Yong Gyun Jung ),( Jung Heon Yoo ),( Jung Il Choi ),( Eung Eun Kim ),( Min Chul Lee ),( Seung Ok Lee ),( Seik Joo ),( Sang Hoon Song ),( Eui Chong Kim ),( Sung Hoon Kwon ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: A rapid antibiotic susceptibility test (RAST) is desperately needed in clinical settings for fast and appropriate antibiotic administration. Traditional ASTs are not suitable for urgent cases of bacterial infection and antibiotic resistance due to their relatively long test times. Although many new ASTs have been developed, they are not practiced in clinics. Methods: we developed a RAST system called MAC 2.0. In the MAC 2.0 system, the MIC values were determined by bacterial growth imaging with single cell resolution. For single cell tracking, we used agarose as a fi xing agent in a microfi uidic channel. We also invented a novel AST method called single-cell morphological analysis (SCMA) that can determine antimicrobial susceptibility by automatic analyzing and categorizing morphological changes in single bacterial cells under various antimicrobial conditions. Results: When four Clinical and Laboratory Standards Institute (CLSI) standard bacterial strains and 189 clinical samples, including extended-spectrum ß-lactamase (ESBL)- positive E. coli and K. pneumoniae, 5 imipenem-resistant P. aeruginosa (IRPA), methicillin- resistant S. aureus (MRSA) and vancomycin-resistant Enterococci (VRE) from hospitals, were tested with SCMA with gold standard broth microdilution test, the AST results were obtained only in 3~4 hours with 91.5% categorical agreement and 6.3% minor, 2.9% major and 1.4% very major discrepancies to satisfy the FDA standard for AST system. Conclusions: we determined antibiotic susceptibilities with a novel AST method called SCMA only in 3~4 hours showing accurate AST Results: This SCMA method can be used for fast and accurate treatments for urgent infection cases leading the increase of the cure rate.
박태근,김부성,이창돈,유순집,임계순,양영상,윤기주,선희식 대한내과학회 1990 대한내과학회지 Vol.39 No.1
Ogilvie's syndrome is a descriptive term referring to a clinical entity in which the signs and symptoms of rapid colonic distension are present without evidence of mechanical obstruction. The pathogenesis of pseudoobstruction remains unknown. Because it has been associated with such a wide variety of concomitant conditions, it is likely that several pathophysiologic mechanisms may trigger the pseudoobstruction. This syndrome is clinically important because of impending colonic perforation due to marked colonic distension. We experienced a case of Ogilvie's syndrome associated with pancreas cancer and reported with the review of the literature.