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엄태인(Tae-In Ohm),채종성(Jong-Seong Chae),김정규(Jung-Ku Kim),최수아(Soo-A Choi),오세천(Sea-Cheon Oh) 한국연소학회 2014 KOSCOSYMPOSIUM논문집 Vol.2014 No.11
In this study, we carried out torrefaction experiment using PKS(Palm Kernel Shell), and Bagasse as a raw material of oversee of herbaceous biomass and using waste wood and logging residue as a raw material of domestic of woody biomass. And then, by analyzing the physical & chemical properties, we investigated the characteristics as a fuel. By using the result of thermo gravimetric analysis, the biomass residue was torrefied for 30 minutes at a temperature range of 250-350℃ in anaerobic condition. As a result, torrefied materials of moisture content are lower than raw , but of fixed carbon, calorific value and ash are higher than raw.
엄태인(Tae-In Ohm),이금배(Kum-Bea Lee),장동순(Dong-Soon Jang) 한국전산유체공학회 1996 한국전산유체공학회 학술대회논문집 Vol.1996 No.-
A numerical study is performed using the PIIOENICS CODE and compared against experimental results to analyze the flow field of the model to a scale of 1:10 prototype municipal waste incinerator for 300 ton/day. The key computational parameters considered are injection angle of secondary airs above grate and ratio of the primary and the secondary air of the stoker incinerator. A control-volume based finite-diffcrence method is used together with the power-law scheme for the interpolation of control volume interface. The pressure-velocity coupling in momentum equations is resolved by the SIMPLEC algorithm. Further, the standard two-equation k- ε turbulence model is employed for the Reynolds stress together with the proper turbulent Prandtl/Schmidt number assumption for the heat and mass transfer.<br/> The calculated results agree well qualitatively with the experimental data especially in the major flow patterns, say the velocity vector field and the characteristics of the recirculation zone for prototype incinerator.<br/> Based on the parametric numerical calculation, the following useful results can be drawn : The position and size of the recirculation zone can be varied according to the change of injection angle for the secondary air nozzles. Further, the recirculation zone in the secondary combustion chamber is disappeared when the air ratio of the primary and the secondary is increased 63%:35% to 80%:20%.<br/> Finally, the effect of the secondary air on the flow field of the regioo of the afterburner is confirmed through the variation of the velocity air temperature of two secondary nozzle B & C.
흑색 황산3가크롬을 이용한 태양열 흡열판 선택흡수막 도금기술
엄태인(Ohm Tae-In),여운택(Yeo Woon-Tack),김동찬(Kim Dong-Chan) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.3
One of the most important factors that have a large influence on performance of the solar water heater system is performance of the solar collector, more detailedly, coating technology on the surface of the solar collector, which can provide high solar absorptance and low emittance. The core of the coating technology is to coat solar selective surfaces. In this study, various performance experiments are carried out using Cr₂(SO₄)₃・15H₂O coating technology. Here, IGBT(Insulated Gate Bipolar Transistor) of 5000A-15V was used as the surface processing rectifier which can stably output power and also can control voltage and current. The plating solution mainly contains black chrome<SUP>+3</SUP> concentration, H-y Conductivity, N-u Complex, NF Additive and NC-2 Wetter. Before applying the black chrome coating on the copper plate, optimal conditions are provided by using various preprocessing methods such as removal of fat, activation, electrolytic polishing, nickel strike, copper sulfate plating and bright neckel plating, and then the automatic continuous coating experiment are performed according to plating time and cathode current density. In the experiment, after the removal of fat, chemical polishing, nickel strike and activation processes as the preprocessing methods, the black chrome coating was performed in a plate solution temperature of 28℃ and a cathode current density of 18A/㎠ for 90seconds. The thickness of chrome and nickel on the coated plate is 0.389㎛, 159㎛ respectively. As a result of the coating experiment, it showed the most excellent performance having a high solar absorptance of 98% and a low emittance of 5±1% when the black chrome surface had a thickness of 0.398㎛.
정영태 ( Yeong-tae Jeong ),윤영민 ( Young-min Yoon ),김웅래 ( Woong-rae Kim ),이다훈 ( Da-hoon Lee ),채종성 ( Jong-seong Chae ),강원철 ( Won-chul Kang ),강태우 ( Tae-wooe Kang ),김태강 ( Tae-kang Kim ),엄태인 ( Tae-in Ohm ) 한국폐기물자원순환학회(구 한국폐기물학회) 2020 한국폐기물자원순환학회 추계학술발표논문집 Vol.2020 No.-
2018년 전 세계에서 폐비닐, 폐플라스틱 등의 폐기물 최대 수입국이었던 중국이 폐기물을 수입 중단하여 전 세계적인 폐기물 대란이 발생하였으며, 최근 코로나 19로 인한 배달 음식 주문이 폭증하여 일회용 폐비닐, 폐플라스틱의 배출이 급증하고 있다. 따라서 정부는 제조 단계부터 재활용이 쉽게 생산하고, 재활용이 어려운 제품은 단계적으로 퇴출하고 폐비닐, 폐플라스틱 등을 고품질 선별기술, 재활용제품 제조기술을 조기에 상용화하는 등의 대책을 세우고 있다. 본 연구에서는 폐비닐 탈수 후 함수율이 10% 이하이면서 소모되는 에너지는 절감할 수 있는 저 에너지 탈수 시스템을 개발하고자 한다.