통계적 접근을 통한 LiBr 수용액 내 탄소강의 최대 국부 부식 깊이 추정

한상무(Sang Moo Han),조윤호(Yunho Cho),서호진(Hojin Seo),정시영(Siyoung Jeong) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.11

Pitting corrosion is a critical defect in the high temperature generator of absorption chillers using LiBr aqueous solution because it can cause severe cracking of the metal structure. Therefore, pitting corrosion is a very important research topic in absorption chiller. But it is not easy to deal with because the pits have complicated generation mechanism and are affected by various factor such as microstructure of metal and exposed circumstance. In this study, experiments have been conducted for 500 hours to investigate the pit corrosion on the surface of carbon steel specimens in 63% LiBr-H₂O solution. Statistical method has been used to analyze the depth and the shape of the pits. Maximum pit depth has been found to be about 59 ㎛ and the pit depth of the elliptical shape seems to be deeper than the wide & shallow one. The result of the present study is expected to be effectively applied to the corrosion analysis for absrption chillers using LiBr aqueous solution.

소설의 「 미적 지리 」 와 예술적 형상화 - 이효석 · 김유정의 작품을 대상으로 -

한상무 ( Sang Moo Han ) 한국어교육학회 1977 국어교육 Vol.- No.30

Alum 슬러지를 이용한 인제거용 흡착제 개발

한상무 ( Sang Moo Han ),김도형 ( Do Hyung Kim ),김소희 ( So Hee Kim ),김홍민 ( Hong Min Kim ),정병곤 ( Byung Gon Jeong ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.4

Various media were manufactured using different ratios of alum sludge obtained from a water purification plant, loess, and clay, and the properties of the media were investigated. The results revealed that the optimal compressive strength was achieved at a ratio of 15/65/20 (alum sludge/loess/clay). In addition, the absorption rate of the media increased with an increase in the quantity of alum sludge in the media. Furthermore, the scanning electron microscopy analysis of the pore structure of the media revealed that the optimal permeability was achieved at a ratio of 15/65/20. Additionally, the manufactured media satisfied the dissolution test of heavy metals regardless of the mixing ratio. Furthermore, at the optimal mixing ratio, the removal efficiency of phosphorus by the media increased with a decrease in the size of the media.

리얼리즘과 그 수법 - 염상섭의 경우 -

한상무 ( Sang Moo Han ) 한국어교육학회 1972 국어교육 Vol.- No.18

하수슬러지를 이용한 Bio-block의 비점오염물질 제거 가능성 평가

한상무 ( Han Sang Moo ),김도형 ( Kim Do Hyeong ),정병곤 ( Jeong Byung Gon ) 한국물환경학회 2021 한국물환경학회지 Vol.37 No.5

On the assessment results of the non-point source pollutant removability of bio-block using waste sewage sludge, at the reactor’s initial operation stage, the removal efficiency of COD was slightly unstable. However, after the reactor was stabilized, the COD removal efficiency was higher in the reactor filled with bio-blocks compared to the reactor filled with broken stones. In terms of nitrogen and phosphorus, their removal efficiency was unstable at the initial stage of the reactor operation. This phenomenon was investigated through the bio-block elution experiments. Results indicated that nitrogen and phosphorus were eluted from the bio-blocks affecting their removal at the initial operation. Furthermore, based on elution tests conducted after the dry ashing of the waste sewage sludge, part of the nitrogen and phosphorus was eluted similar to the bio-block elution test results, although considerable amounts of nitrogen and phosphorus were reduced compared to the sludge cake. Prior to the use of the waste sewage sludge bio-blocks as a filter medium to remove non-point source pollutants, a stabilization period of 10 days was required. After the stabilization process, results showed similar characteristics as general aggregates. Moreover, to use the bio-block as a filter medium for the non-point pollutant removal, the filling ratio of 75% was the most suitable as it resulted in the highest nitrogen removal efficiency after the stabilization. The results of this study suggested that waste sewage sludge can be suitably recycled as a mixed raw material for the bio-blocks, with satisfactory application as a filter medium in artificial wetlands, stormwater runoff problems, stream water pollutants to eliminate non-point source pollutants.

원저(原著) : 혈액형 자동화 System의 유용성 평가

이충영 ( Chung Young Lee ),한상무 ( Sang Moo Han ),장동익 ( Dong Ik Chang ) 대한임상병리사협회 1997 임상수혈검사학회 발표자료집 Vol.4 No.1

배 경 : 모든 영상검사 업무에 자동화 및 전산화 개념이 도입되어 업무를 효율적으로 개선하여 검사업무의 질을 향상 시켰으나 유독 혈액형 검사 분야에 있어서는 자동화의 국내 소개가 비교적 늦었다. 대한적섭자사 혈액원에서는 혈액형검사의 질을 향상시키기 위해 이미 자동화 system을 도입하여 사용하고 있는데 이에 저자는 중소규모 혈액원에 도입된 반자동 장비인 IBG system의 유용성을 평가하고 사용경험 예를 보고하는 바이다. 방 법 : 1996년 7월 1일부터 1997년 3월 31일까지 대한적십자사 경기도 혈액원에서 헌혈한 총 81,586명의 헌혈자를 대상으로 IBG system을 이용하여 혈액형 검사를 실시하여 ABO, Rh, mistype, ABS, subgroup의 분포를 조사 하였다. 결 과 : 조사 대상인 총 81,586명의 혈액형 분포는 A형 33.97%, B형 27.51%, O 형 26.94%, AB형 11.57%였고 Rh(D)음성은 0.36%를 나타내었다. 채혈현장에서 mistype으로 확인된 결과는 219(0.27%)건으로 조사 되었으며 한냉항체계열의 불규칙항제 검출은 195(0.24%)건 이었고 ABO 불일치를 나타낸 subgroup은 17(0.02%)건으로 조사되었다. 결 론 : 현재 적십자 혈액원에 도입되어 사용하고 있는 혈액형 자동화 system은 수기로 검사 했을 때보다 정확도 및 정밀도등 혈액형 검사의 질적인 향상이 이루어 졌다고 판단되며 검사실 여건에 맞는 방법을 modify하여 최적의 혈액형 검사 system 구축을 위해 노력해야 할 것으로 사료된다. Background : Since the automation and computerization have been introduced to all department of the clinical examination, it has made an great improvement for the part of clinical work in efficiency and quality but, it was comparatively late only for blood typing test area of applying automation. In the meantime, The Korean Red Cross Blood Center had already been introduced the automatic system into blood typing test in order to get the quality improve. Hence, Author evaluated the usefulness of the semiautomatic instrument IBG system Which was introduced to the small and medium blood center and brief the experience of using the system. Method : We held a blood typing test by making good use of IEG System for a blood donation of 81,586 total that was collected at The Korean Red Cross Kyung Ki Do Blood Center. For the period from 01 July 1996 till 31 March 1997 and we investigated the distribution of ABO, Rh mistype, ABS, subgroup of the test. Result : The distribution of blood type for the blood donor of 81,586 total was indicated to A type : 33.97%, B type : 27.51%, O type : 26.94%, AB type : 11.57% and Rh (D) negative is 0.36%. The mistype confirmed in blood donation ground was 219 cases(0.27%) and the irregular antibody detected from cold antibody order was 195(0.24%) and the subgroup proved ABO discrepaney was reported to 17 (0.02%). Conclusion : At present, the automatic system for blood typing which has been introduced to use at the Korea Red Cross Blood Center have accomplished accuracy, precision and quality improvement in blood typing test better than manual method. Consequently, we should modify the method suited to the laboratory environment and make efforts to build a most appropriate blood typing test system.

LiBr 수용액 내 부식억제제 농도에 따른 탄소강의 부식 깊이에 대한 통계적 분석

남영광(Young Kwang Nam),한상무(Sang Moo Han),유주현(Ju Hyun Yoo),정시영(Siyoung Jeong) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11

Carbon steel corrosion in high temperature(200℃) LiBr aqueous solutions used in the triple-effect absorption chillers is a very important topic. Although many studies were conducted, researches about the corrosion depth according to an inhibitor concentration have been rarely investigated. In this study, therefore, the effect of a concentration of the corrosion inhibitor Li2MoO4 on the corrosion depth under the high temperature operating conditions has been investigated. The depth of the pitting corrosion was measured using FE-SEM and analyzed using three statistical methods: General Lambda Distribution(GLD), Generalized Extreme Value(GEV), and Monte-Carlo Simulation. Also, a gravimetric method was used to the depth of the uniform corrosion. The results indicate that the corrosion depth are greatly reduced for both uniform and pitting corrosion if corrosion inhibitor is used. Moreover, the solution with a inhibitor concentration of 500ppm showed a smaller corrosion than the one with a concentration of 300ppm. The present study is expected to give useful information to for the development of tripple-effect absorption chillers using LiBr aqueous solution.

1kW 이하의 평판형 SOFC 스택제작 및 성능평가

조남웅(Cho, Nam-Ung),황순철(Hwang, Soon-Cheol),한상무(Han, Sang-Moo),김영우(Kim, Yeoung-Woo),김승구(Kim, Seng-Goo),전재호(Jun, Jae-Ho),김도형(Kim, Do-Hyeong),전중환(Jun, Joong-Hwan) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06

Stacks of solid oxide fuel cell under 1kW max power were designed on planar type employing anode supported cell and metallic interconnects. The stacks composed of 3-cells, 8-cells, and 16-cells were fabricated by using single cell purchased from Indec, sealant and interconnect prepared at RIST. In performance test of the final 16-cells stacks, OCV was recorded to be 16.7 V. Peak power and power density were 1 kW, 0.77 W/cm^{2} at 820?C, respectively. In addition, the long term degradation rate of the power exhibited 2.25 % in 500 h at 750?C.

1kW 평판형 SOFC 스택제작 및 성능평가

조남웅(Cho, Nam-Ung),황순철(Hwang, Soon-Cheoi),한상무(Han, Sang-Moo),김영우(Kim, Yeong-Woo),김승구(Kim, Seung-Goo),전재호(Jun, Jae-Ho),김도형(Kim, Do-Hyeong),전중환(Jun, Joong-Hwan) 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.3

Stacks of solid oxide fuel cell with 1kW max power performance were designed on planar type employing anode-supported cells and metallic interconnects. The stacks composed of 3-cells, 8-cells, and 16-cells were fabricated and tested in serials by using anode-supported cells purchased from Indec, and sealants/interconnects prepared at RIST. In the performance test of the final 16-cells stack, OCV was recorded to be 16.7V. The peak power and the power density showed 1 kW, 0.77W/cm² at 820?C, respectively. In addition, the long-term degradation rate of the power exhibited 2.25 % during 500h at 750?C.

원저(原著) : 공혈혈액의 B형간염 판독기준에 관한 연구

장동익 ( Dong Ik Chang ),강권철 ( Kwon Chul Kang ),한상무 ( Sang Moo Han ),이충영 ( Chung Young Lee ),조도현 ( Do Hyun Cho ) 대한임상병리사협회 1999 임상수혈검사학회 발표자료집 Vol.5 No.1

This study was aimed to develop a more accurate method for the detection of HBV(Hepatitis B Virus) infection in the donated sera at the Kyounggi Do Red Cross Blood Center. The samples were collected from February 1998 to August 1998. The sera were devided into 5 groups(A, B, C, D, and E) according to OD(Optical Density)value of EIA(Enzyme Immunoassay). EIA,RIA(Radio Immunoassay) and PCR(Polymerase Chain Reaction)were performed for these samples to compare the results. Among 10 samples of group A(cut off : 0.050~0.073). EIA for HBsAg was negative for the whole sample, but the result of RIA was found to be negative for 9 sample with one positive. The results of neutralization test were the same in EIA and RIA. The sera of group C which were equivocal by EIA were found to be negative by RIA. The group D(OD value : 0.500~l.000) showed 9 positive sera by EIA of HBsAg, but only one positive by RIA of HBsAg. For group E. the result of EIA was in perfect accordance with that of RIA except one serum. Late confirmation of this serum proved that the result of the first EIA was false positive. Dilution experiments showed that the sensitivity of PCR was 105~6 time higher than EIA. When the result of PCR-amplified HEV DNA detection was compared with those of EIA and RIA, the presence of HBV was confirmed even in group A. which group was judged safe by EIA and RIA. This result suggests that a more accurate method like PCR-amplification of HBV DNA should be developed for the safety of public health.