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윤종성,이상인,이재성,박호군,Yun, Jong-Seong,Lee, Sang-In,Rhee, Jae-Seong,Park, Ho-Koon The Society of Korean Medicine 1998 대한한의학회지 Vol.19 No.1
The purpose of present study is to clarify the differences between EIslwitzia Ciliata (Thunb.) Hylander(향유) and Elsholtzia splendens Nakai ex F. Maekawa (꽃향유) for standardization and the proper usage as medicinal herbs. The major ingredients of both species were isolated by distillation and extraction. The qualitative and quantitative analyses of major distillates were carried out by the use of GC/MS. There was a significant difference between the components of Elsholtzia ciliata and Elsholtzia splendens in the aspects of major components. Several common ingredients were identified as linalool, cumene, elsholtzia ketone, naginata ketone isomer, naginata ketone, myristicin, and sesquiterpene alcohol. Comparison between Elsholtzia. ciliata and Elsholtzia splendens was done in the aspect of major compounds. Myristicin (33.7%) has been shown to be the major component in Elsholtzia ciliata whereas naginata ketone isomer (26.1%) was believed to be a major ingredient in Elsholtzia splendens. The elsholtzia ketone was also one of the major differentiating factors between Elsholtzia splendens and Elsholtzia ciliata, and the quantity is 15.1% in Elslwltzia splendens compared to 2.87% in Elsholtzia ciliata. Moreover, in the Elsholtzia splendens, 4- vinylguaiacol and isoosmorhizole were absent, but both compounds were present in the EIsholtzia ciliata.
다점 프레스를 이용한 곡면 성형의 가공 정보 산출을 위한 IDA 방법
윤종성(JONG-SUNG YOON),이장현(JANG-HYUN LEE),유철호(CHEOL-HO RYU),황세윤(SE-YUN HWANG),이황범(HWANG-BEOM LEE) 한국해양공학회 2008 韓國海洋工學會誌 Vol.22 No.6
Flame bending has been extensively used in the shipbuilding industry for hull plate forming. In flame bending, it is difficult to obtain the desired shape because the residual deformation dependson the complex temperature distribution and the thermal plastic strain. Mechanical bending such as reconfigurable press forming, multi-point press forming or die-less forming has been found to improve the automation of hull plateforming because it can more accurately control the desired shape than line heating. Multi-point forming is a process in which external forces are used to form metal work-pieces. Therefore it can be a flexible and efficient forming technique. This paper presents an optimal approach to determining the press-stroke for multi-point press forming of curved shapes. Air integrated configuration of Finite element analysis (FEA) and spring-back compensation algorithm is developed to calculate tile strokes of the multi-point press. Not only spring-back is modeled by elastic plastic shell elements but also an iterative algorithm to compensate the spring-back is applied to adjust the amount of pressing stroke. An iterative displacement adjustment (IDA) method is applied by integration of the FEA procedure and the spring-back compensation work. Shape deviation between the desired surface and deformed plate is minimized by the IDA algorithm.
김준식(Jun Sik Kim),김사중(Sa Jung Kim),윤종성(Jong Sung Yun),강용(Yong Kang),최명재(Myoung Jae Choi) 한국공업화학회 2002 공업화학 Vol.13 No.5
폐유와 같은 산업 폐기물의 처리는 환경 보호 측면에서 많은 관심을 모아지고 있다. 토양 등에 2차 오염의 문제가 있는 매립에 의한 처리 대신에 폐유의 연소는 적절한 처리 방법으로 특히, 폐유의 높은 발열량을 고려하면 보다 타당한 방법이라 할 수 있다. 따라서, 본 실험에서는 유동층 연소로(0.1 m ID×2.5 m in height)에서 폐유 연소시 열전달 특성에 대한 운전 변수들의 영향을 고찰하였다. 과잉공기율과 폐유의 공급속도는 각각 0∼60% 그리고 10∼40 g/min으로 하였다. 유동층의 층 영역에서 폐유 연소시 열전달계수는 온도 증가에 따라 증가하였으나 과잉공기율의 증가에 따라 열전달계수는 감소하였다. 그리고, 폐유 공급속도의 증가에 따라 최대값을 나타내었다. 하지만, 프리보드영역에서의 열전달계수는 과잉공기율과 폐유 공급속도의 증가에 따라 증가하였다. 본 실험의 결과는 폐유의 연소를 위한 유동층 연소로의 적정한 조업조건의 결정과 이의 설계 및 scale-up을 위한 기초자료로 활용될 수 있다. Disposals of industrial wastes such as waste oil have been one of the important public concerns in view of environmental protection. Because of the secondary pollution of soil, combustion of waste oil has been one of the appropriate methods instead of landfill, especially, considering the heating value of waste oil. In this study, therefore, effects of operating variables on the heat transfer characteristics of waste oil combustion have been investigated in a fluidized-bed combustor (0.1 m ID×2.5 m in height). The excess air ratio and feed rate of waste oil are ranged from 0 to 60% and from 10 to 40 g/min, respectively. The heat transfer coefficient was increased with increasing bed temperature, but it was decreased with increasing excess air ratio. And it had a maximum in the range of the feed rate in the bed region of the fluidized bed. In the freeboard region of the fluidized bed, however, the heat transfer coefficient was increased with increasing excess air ratio and feed rate of waste oil, respectively. The results of this study can be utilized to determine the optimum conditions of fluidized-bed combustor for combustion of waste oil and design as well as scale-up of it.
무기질 흡착제를 이용한 증기상 유해 중금속의 고온제거특성
박성하,윤종성,고명한 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-
This study investigated the kinetics of the sorption reaction for gaseous lead capture in the packed bed of calcined kaolin at 973~1173 K. The effects of bed temperature and gaseous reactant concentration on the sorption reaction rate were observed by the analysis of experimental data with a developed kinetic model. Detailed information on the lead-sorbent reaction were obtained by the XRD(X-ray diffraction) pattern analysis and the microscopic analysis of pre- and post-sorption sorbent samples. The reaction between metakaolinite, which is the calcination product of kaolin minerals, and the gas-phase lead generated stable metal-mineral complexes(PbAl₂Si₂O_(8)). An increase in bed temperature resulted in an increase of capturing rate, but it had no effect on maximum uptake. The order of sorption reaction with respect to the lead concentration, m, was determined to be 1.67. The activation energy, E_(a), was estimated as 10.16 kcal/mol, according to the Arrhenius relationship.
김준형,양희철,강문자,강용,윤종성 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.4
소결시킨 kaolin 흡착제 고정층에서의 기체상 납 흡착반응을 973-1,173 K의 온도범위에서 속도론적으로 고찰하였다. 흡착 반응속도에 대한 반응온도 및 기체상 반응물 농도의 영향은 속도론적 모델을 통한 실험자료 분석으로 평가되었다. 납-흡착제 반응에 대한 보다 자세한 정보는 반응 전·후 흡착제에 대한 XRD(X-ray diffraction) 분석 및 현미경분석으로 얻어졌다. Kaolin 광물의 소결 생성물인 metakaolinite와 기체상 납과의 반응은 안정적인 금속-광물 화합물(PbAl₂Si₂O_8)을 생성하였다. 반응온도의 증가는 납 제거속도를 증가시켰지만 최대 흡착량에는 영향을 주지 못했다. 납 농도에 대한 반응차수, m은 1.67로 결정되었다. Arrhenius식에 의해 구해진 활성화에너지 E_a는 10.16 ㎉/㏖ 이었다. This study investigated the kinetics of the sorption reaction for gaseous lead capture in the packed bed of calcined kaolin at 973-1,173 K. The effects of bed temperature and gaseous reactant concentration on the sorption reaction rate were observed by the analysis of experimental data with a developed kinetic model. Detailed information on the lead-sorbent reaction were obtained by the XRD(X-ray diffraction) pattern analysis and the microscopic analysis of pre- and post-sorption sorbent samples. The reaction between metakaolinite, which is the calcination product of kaolin minerals, and the gas-phase lead generated stable metal-mineral complexes(PbAl₂Si₂O_8). An increase in bed temperature resulted in an increase of capturing rate, but it had no effect on maximum uptake. The order of sorption reaction with respect to the lead concentration, m, was determined to be 1.67. The activation energy, E_a was estimated as 10.16 ㎉/㏖, according to the Arrhenius relationship.
유동층 반응기에서 폐 Polystyrene 의 열분해 특성
김준식,강용,최명재,김사중,윤종성 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.4
유동층 열분해 반응기에서 일반용 폴리스티렌(GPPS)과 폐 발포 폴리스티렌(EPSW)을 원료로 하여 열분해를 수행하였다. 질소와 모래를 각각 유동화 가스와 층물질로 이용하였다. 열분해 온도(400-650℃)와 가스 유속(0.3-0.6 m/s)이 열분해 결과 생성되는 생성오일과 스티렌 단량체의 수율에 대한 영향을 고찰하였다. 오일과 스티렌 단량체의 수율은 온도와 가스 유속의 증가에 따라 최대값을 나타내었고 최대 오일 수율과 최대 스티렌 단량체 수율은 시료가 GPPS인 경우 각각 93 wt%(600℃) 와 65wt%(500℃)로 나타났으며 원료 물질이 EPSW인 경우 각각 95 wt%(600℃)와 60 wt%(550℃)로 나타났다. 유동층 열분해 반응기에서 PS 열분해시 열분해 반응온도는 생성물의 조성에 큰 영향을 보여주었고 유동화 가스유속은 생성물의 수율 결정에 큰 영향을 나타내었다. Pyrolysis of polystyrene wastes was investigated in a fluidized bed reactor. The feed materials were GPPS(general purpose polystyrene) and EPSW(expanded polystyrene waste). Nitrogen and silica sand were used as a fluidizing gas and a bed material, respectively. Effects of temperature(400-650℃) and gas velocity(0.3-0.6 m/s) on the yields of oil and styrene monomer were determined. It has been found that the yields of oil and styrene monomer exhibited maximum values with increasing pyrolysis temperature or gas velocity in the reactor. The maximum yields of oil and styrene monomer were 93 wt% (600℃) and 65 wt%(500℃), respectively in the beds of GPPS and 95 wt%(600℃) and 60 wt%(550℃), respectively in the beds of EPSW. The pyrolysis temperature affected the composition of products for the pyrolysis of PS and the velocity of fluidization gas affected the determination of product yield in the fluidized bed reactor.