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삼상 순환유동층의 상승관에서 연속 액상의 축방향 혼합특성
유명선,손성모,강석환,강용,김상돈 한국공업화학회 2004 공업화학 Vol.15 No.1
직경이 0.102 m이고 높이가 3.5 m인 기체-액체-고체 순환 유동층의 상승관에서 액상의 축방향 혼합특성을 고찰하였다. 기체유속(0.01~0.07 ㎧), 액체유속(0.25~0.31 ㎧) 그리고 고체순환속도(2~8 ㎏/㎡s)를 실험변수로 선정하였으며 이들 변수들이 액상의 축방향 분산계수에 미치는 영향을 고찰하였다. 축방향의 추적자 농도분포로부터 분산모델을 사용하여 액상의 축방향 분산계수를 구하였다. 액상의 축방향 분산계수는 기체유속과 고체순환속도가 증가함에 따라서 증가하였으나 액체의 유속의 증가에 따라서는 약간 감소하였다. 또한, 액상의 축방향 분산계수는 등방성 난류 모델을 적용한 무차원군으로 표현되는 상관식으로 나타낼 수 있었다. Characteristics of liquid dispersion in the axial direction were investigated in the riser of a three-phase circulating fluidized bed whose diameter is 0.102 m and 3.5 m in height. Effects of gas (0.01-0.07 m/sl and liquid (0.25-0.31./s) velocities and the circulation rate of solids (2∼8 kg/m^(2)s) on the dispersion coefficient of the continuous liquid phase in the axial direction were determined. A dispersion model was employed to obtain the axial dispersion coefficient of the liquid phase from the radial concentration profiles of tracer with variations of axial position. The axial dispersion coefficient of the liquid phase increased with increasing gas velocity or solid circulation rate, however, decreased slightly with increasing liquid velocity in the riser bed. The axial dispersion coefficient of the liquid phase was well correlated in terms of dimensionless groups based on the isotropic turbulence theory.
Anisakids larvae의 형태학적 분류 : 해산어류 및 두족류를 중심으로 On the Marine fishes and Cephalopoda
이정훈,정영모,한성용,손성원 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-
In order to study classification of the morphological features and types of anisakids larvae eight species of marine fishes and two cephalopoda purchased in the near southern sea in Korea, were investigated and classified into the morphological characteristics of each type of the larvae, and the following results were obtained on the basis of the methods of Berland(1961), Koyama et al(1969) and Chai et al(1986). 1. Anisakis(typeⅠ) larva: The length and width of nematode are 14.2∼26.4mm and 0.22∼0.51mm respectively. The anterior region has well-developed boring tooth. Tail is 0.09∼0.12mm and the tip of tail has a globular form and well-developed a mucron. 2. Terranova (type A) larva: The length is 24.5∼34.1mm and longest among anisakids larvae. Width is 0.50-0.84mm, and intestinal cecum had reached one-third of anterior larva of ventriculus, and the worm has three lips at anterior end, and had boring tooth on the lips. The tail is 0.08∼0.12mm and has well-developed a mucron. 3. Raphidascaris spp. larva: The nematode was 8.20∼8.42mm in length and 0.21∼ 0.29mm in width. The anterior region has boring tooth. Especially, the genital organ was developed. The tail is 0.11∼0.12mm and has well-developed mucron at the tip of it. 4. Contracaecum(type A) larva: The nematode was 6.8∼9.4mm in length and 0.09∼ 0.15mm in width. The lips were depressed. The Anterior region do not have boring tooth. The tail is 0.08∼0.09mm relatively short and has about 15∼30 micro-spines and mucron at its terminal portion. 5. Contracaecum (Type A') larva: The nematode was 17.5∼24.4mm in length and 0.22∼0.27mm in width. The lips were depressed and the anterior region does not have boring tooth as the type of Contracaecum A. The tail whose length was 0.20∼0.31mm was very long and had about 7∼12 minutes spines at its terminal portion. 6. Contracaecum (Type C) larva: The worm was 13.6∼35.2mm and 0.28∼0.60mm in size, and the lips were depressed and the anterior region does not have boring tooth. The tail did not have mucron, as the type of Contracaecum A, A'. 7. Contracaecum(Type C') larva: The worm was 10.2∼14.8mm and 0.15∼0.22mm in size, and had boring tooth as the type of Contracaecum A, A' and C. The tail was 0.08∼0.09mm and relatively short. In addition, it did not have mucron at its terminal portion. 8. Contracaecum (Type D) larva: The worm was 12.0∼19.8mm and 0.16∼0.25mm in size, and had boring tooth as the type of Contracaecum C'. The tail was 0.11∼0.16 and had small mucron at its terminal portion. 9. Contrecaecum (Type D') larva: The worm was 7.10∼16.5mm and 0.14∼0.25mm in size, and had boring tooth as the type of Contracaecum C' and D. The tail was 0.11∼0.16mm, and covered with sheath, as the type of Contracaecum D but did not have a mucron.
Oxygen Transfer in a Three-Phase Circulating Fluidized Bed with Viscous Liquid Medium
Son, Sung Mo,Kang, Suk Hwan,Kim, Uk Yeong,Shin, Ik Sang,Kang, Yong,Kim, Sang Done The Society of Chemical Engineers, Japan 2008 Journal of chemical engineering of Japan Vol.41 No.7
<P>Characteristics of oxygen transfer were investigated in the riser of a viscous three-phase circulating fluidized bed, with a diameter of 0.102 m (ID) and a height of 3.5 m. Effects of gas (0.01–0.09 m/s) and liquid (0.12–0.43 m/s) velocities, fluidized solid particle size (1.0, 1.7, 2.1, 3.0 mm), solid circulation rate (2–8 kg/(m<SUP>2</SUP>·s)) and liquid viscosity (0.96–38 mPa·s) on the volumetric oxygen transfer coefficient in the riser were examined. The oxygen transfer coefficient was found to increase with increasing gas velocity, particle size and solid circulation rate, while it decreased with increasing viscosity of the continuous liquid medium, and changed very little with the variation of liquid velocity. The oxygen transfer coefficients were well correlated in terms of dimensionless groups as well as operation variables.</P>
Gas holdup and gas-liquid mass transfer in three-phase circulating fluidized-bed bioreactors /
Son, Sung Mo,Kang, Suk Hwan,Kang, Tae Gyu,Song, Pyung Seob,Kim, Uk Yeong,Kang, Yong,Kang, Hyoung Ku The Korean Society of Industrial and Engineering C 2007 Journal of industrial and engineering chemistry Vol.13 No.1
Pressure fluctuations and bubble size in viscous three-phase circulation fluidized bed bioreactors
Sung Mo Son,신익상,Suk Hwan Kang,강용,김상돈 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.5
Characteristics of pressure fluctuations and bubble size were investigated in the riser of a three-phase circulation fluidized bed bioreactor with viscous liquid medium, whose diameter is 0.102 m (ID) and 3.5 m in height. Effects of gas (0.01-0.07 m/s) and liquid (0.17-0.23m/s) velocities and liquid viscosity (0.96-38mPa·s) on the bubble size in the riser were examined. The bubbling phenomena in the bioreactor with viscous liquid medium were interpreted effectively by measuring and analyzing the pressure fluctuations by adopting chaos theory. The bubble size increased with increasing gas velocity or liquid viscosity, but decreased with increasing liquid velocity. The bubbling phenomena became more complicated and bubble size distribution tended to broad, with increasing gas velocity or liquid viscosity. The bubble size was well correlated in terms of correlation dimension of pressure fluctuations as well as dimensionless groups within these experimental conditions.