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삼중 다공판형 맥동탑에서 액적크기 및 분포에 대한 연구
조병렬,황성태,이보성 ( Byung Real Jo,Sung Tai Hwang,Bo Sung Rhee ) 한국공업화학회 1995 공업화학 Vol.6 No.6
삼중 다공판형 맥동탑에서 평균액적 크기와 분포에 대한 연구를 수행하였다. 맥동탑은 직경이 4.65㎝이고, 유효 높이가 6m이며, 다공판의 hole 크기가 2.5㎜이며, 개공비가 30%인 삼중 다공판으로 구성되어 있다. 실험은 물질전달이 있는 계와 없는 계에서 실시하였으며 물질 전달이 있는 계로는 40% TBP(Tri-butyl phosphate)/dodecan-2N HNO₃UNH(uranyl nitrate hydroxides) 용액을, 물질 전달이 없는 계로는 40% TBP(tri-butyl phosphate)/dodecan-2N HNO₃ 수용액을 선정하여 수행하였다. 맥동탑 내에서의 평균 액적 크기 및 분포는 사진촬영으로 측정하였다. 맥동탑 내에서 액적크기 분포는 Mugele-Evans 분포를 이용하여 해석할 수 있었다. 액적의 평균 크기는 맥동탑 높이, 맥동속도, 분산상 공탑 속도가 증가할수록 감소하였으며, 연속상 공탑 속도에는 거의 영향을 받지 않았다. 또한 연속상에서 분산상으로 물질전달이 있는 경우가 물질전달이 없는 경우보다 평균액적크기가 더 크며, 삼중다공판형 맥동탑 내의 평균액적크기가 표준형 맥동탑 내의 평균액적크기보다 큰 값을 가졌다. This work has been carried out to study the mean diameter of drop and its distribution in a pulsed column with three manifold plate type. The column, which is 4.65㎝ of diameter and 6m of effective height, is consisted of three manifold perforated plate groups having 30% of free area and 2.5㎜ of hole diameter. The experiments were performed for systems with and without mass transfer, and then, the experimental systems were chosen UNH(uranyl nitrate hydroxides)-40% TBP (tri-butyl-phosphate)/dodecan and 2N HNO₃-40% TBP/dodecan, respectively. The droplet size in pulsed column was determined by photographic method. The droplet size distribution can be interpreted by Mugele and Evans distribution. The mean size of droplet has been decreased with increasing of pulsed column height, pulsed velocity and dispersed velocity, but it has been affected weakly by continuous flow rates. And also, the mean size of droplet with mass transfer was larger than that without mass transfer, and the mean size of droplet in pulsed column with three manifold plate type was larger than that in pulsed column with standard plate type.
조병렬,조중식 忠州大學校 2008 한국교통대학교 논문집 Vol.43 No.-
We analyzed the management index of municipal waste for MBT. The results found out in this study as follows. 1) As a result of computation, the generated quantity of muncipal waste between 1996 and 2005 increased in Cheongju city, but decreased in Chungju city and Jecheon city. 2) The recycling resource after 2000yr decreased according to the management index of municipal waste for MBT.
조병렬 충주대 산업과학기술연구소 1998 産業科學論文集 Vol.6 No.-
Liquid metal reactor(LMR) uses liquid sodium instead of water as a coolant, which is one of salient features comparing with conventional PWRs. Therefore the acquisition of liquid sodium handling technology should be preceded for the LMR development and the present study on the sodium coolant safety is an essential task in the LMR research and development. For that reason, the characteristcs of liquid sodium fire occurring when the hot sodium make a contact with the air are understood. The objective of this study is to study on the characteristics of sodium pool fires. The surface combustion model(SOFIRE II) was used for the analysis of sodium pool fire in a containment vessel. It was turned out that this model showed the overestmation results about the combustion rate and sodium temperature in comparison with experimental results.
산업폐기물 생물학적 탈질시 양이온에 따른 pH 변화 특성
조병렬 한국교통대학교 2020 한국교통대학교 논문집 Vol.55 No.-
This study is a change in pH that can be most easily measured during the denitrification process when biologically denitrifying industrial waste containing high concentration nitrate nitrogen using microorganisms for industrial waste generated during chemical treatment using an alkali solution for NOx capture. The properties were analyzed according to the cation type. As a result, if an alkaline solution is used for nitrogen capture, if biological denitrification is considered as a post-treatment, it is advantageous to capture nitrate nitrogen with a solution having a large electronegativity of cations
충주시에서 발생한 생활폐기물의 물리적 조성에 대한 변동계수 분석
조병렬 한국교통대학교 2018 한국교통대학교 논문집 Vol.53 No.-
In this study, the physical composition of municipal solid waste was analyzed by using coefficient of variation which is statistical data on the physical composition of municipal solid waste. The coefficient of variation of apparent density of municipal solid waste is from 0.39 in March to 1.61, which is the largest in December and in the case of apartment house, it is from 0.24 to 1.44. The coefficient of variation of the physical records was not significantly different from that of wastes of paper waste and food wastes, which produced less waste than vinyl or wood waste. The coefficient of variation for proximate analysis is less than the coefficient of variation of the physical composition.
충주시 생활폐기물의 화학조성 및 발열량에 대한 변동계수 분석
조병렬 한국교통대학교 2019 한국교통대학교 논문집 Vol.54 No.-
ABSTRACT This study analyzed the monthly and seasonal characteristics by using variation coefficients, which are statistical data, on the chemical element composition and calorific value of domestic wastes. They are the basis of incineration treatment. In the case of detached house and apartment house, the coefficient of variation for chemical composition and heating value is in the range of 0.92 for the minimum and 1.2 for the maximum. In the case of detached house and apartment house, seasonal coefficients of variation for low and high calorific values were found to be different.