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최석호(Seok-Ho Choi),백민수(Min-Su Paek),문길호(Kil-Ho Moon) 한국유체기계학회 2003 유체기계 연구개발 발표회 논문집 Vol.- No.-
In butterfly control valve, a multi-hole orifice is attached downstream of valve to stabilize flow fluctuation. The computational simulation is conducted to analyze valve flow characteristics. The results show that the velocity distribution of downstream of valve with the orifice is improved compared to non-orifice case. Test result in site is 60% reduction in vibration.
계층분석법을 활용한 Green City 실증단지 구축을 위한 도서 선정모형 평가
이기학(Lee, Ki-Hak),문상진(Moon, Sang-Jin),문길호(Moon, Kil-Ho),류홍우(Rhew, Hong-Woo),이태원(Lee, Tae-Won),박종포(Park, Jong-Po),최진혁(Choi, Jin-Hyeok),박태성(Park, Tae-Sung),유근배(Yoo, Keun-Bae) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
수소를 기반으로 하는 신재생에너지의 생산, 관리 및 이용 시스템을 연계하여 운전하는 Green City 실증단지 구현을 위한 국내 도서 선정은 지자체별 이해관계와 지역발전계획에 따라 첨예한 논란을 수반할 소지가 있다. 입지 선정 절차상에서 예비후보지 선정과정이 형식적이거나 입지선정기준이 없어 입지선정을 위한 평가항목, 평가기준, 항목별 배점 등이 분석자의 의도에 따라 조정될 수 있는 문제점이 있다. 또한 각 지역에 대한 입지선정을 위한 기준이 있다 하더라도 추상적이거나 객관적이지 않은 기준이 많아 입지선정에 직접 적용하기 어렵고, 자연환경, 사회경제, 법제, 입지조건, 부하특성, 지자체 호응 등 인자들의 평가의 형평성이 결여될 수 있다. 이를 해결하기 위해 의사결정도구로 이용되는 계층분석법(AHP)을 입지선정절차에 적용하였다. 객관적인 정보가 제공 가능한 평가항목을 설정하고, 관련 전문가들의 설문조사를 통하여 주관적인 중요도 결과를 취합하였다. 이 결과를 계층분석법을 활용하여 평가항목별 가치를 측정하여 가중치를 부여하였고, Green City 실증단지 구현을 위한 후보도서의 순위를 제시하였다.
환경친화적 CFB 보일러 입자재순환 장치의 고체량 분배 특성
김유석(You-Seok Kim),황재동(Jae-Dong Hwang),최용준(Yong-Joon Choi),문길호(Kil-Ho Moon),선도원(Do-Won Shun),배달희(Dal-Hee Bae) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
Circulating Fluidized-Bed (CFB) boilers which have been operated in Korea were manufactured by the design technology of foreign leading companies. As they are not active to transfer their technology, domestic companies don't have the enough ability to design it independently yet. Doosan Heavy Industries & Construction Co. Ltd. and Korean Institute of Energy Research are trying to develop and improve the particle re-circulating device among the components of CFB boiler. Our purpose is to control the amount of particles leaving the re-circulating system by adjusting utility air and reuse the heat of circulating particles. The results of experiments with cold model system show that a fluidization state in the particle re-circulating device is very stable when the amount of utility air is supplied to its wind box with 2.29 times of minimum fluidization velocity. Also the amount of particles entering the riser don't increase linearly when the amount of utility air is supplied over 2.5 times of minimum fluidization velocity. Now we are testing its functional run with the hotstate experiment set-up.
Aspen Dynamics(TM)와 ACM을 이용한 용융탄산염 연료전지 시스템의 모사 및 제어
전경연 ( Kyoung Yein Jeon ),곽하연 ( Ha Yeon Kwak ),경지현 ( Ji Hyun Kyung ),이태원 ( Tae Won Lee ),문길호 ( Kil Ho Moon ),이기풍 ( Gi Pung Lee ),류아림 ( Ah Rim Yoo ),양대륙 ( Dae Ryook Yang ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.4
Recentincreasing awareness of the environmental damage caused by the CO2 emission of fossil fuelsstimulated the interest in alternative and renewable sources of energy. Fuel cell is a representative example of hydrogen energy utilization. In this study, Molten Carbonate Fuel Cell system is simulated by using Aspen(TM). Stack model is consisted of equilibrium reaction equations using ACM(TM)(Aspen Custom Modeler). Balance of process of fuel cell system is developed in Aspen Plus(TM) and simulated at steady-state. Analysis of performance of the system is carried out by using sensitivity analysis tool with main operating parameters such as current density, S/C ratio, and fuel utilization and recycle ratio. In Aspen Dynamics(TM), dynamics of MCFC system is simulated with PID control loops. From the simulation, we proposed operation range which generated maximum power and efficiency in MCFC power plant.
Carbonation of Sodium Carbonate and Calcination of Sodium Bicarbonate
Choi, Byoung-Sik,Sung, Duck-Ho,Oh, Kwang-Joong,Moon, Kil-Ho,Park, Sang-Wook 한국공업화학회 2005 응용화학 Vol.9 No.1
Sodium carbonate has been employed for a chemical absorption method to capture carbon dioxide from the mixture of carbon dioxide, nitrogen, and moisture. Sodium carbonate reacts with both carbon dioxide and moisture to form sodium bicarbonate by the carbonation, followed by the calcinations of sodium bicarbonate to release carbon dioxide on flushing with nitrogen to shift the reaction in reverse. A fixed bed was used to observe the breakthrough curves of carbon dioxide, which were used to obtain the reaction rate constants(carbonation rate constant and calcination rate constant) of both reactions from comparison of experimental values with simulated values. Dependence of the reaction rate constants on the reaction temperature was observed using the Arrhenius plots.
Trichoderma reesei 로부터 생산된 효소에 의한 미표백 크라프트 펄프의 가수분해 반응속도모형.
홍석인,강웅기,박상도,문길호,김승섭 고려대학교 공학기술연구소 1984 고려대학교 생산기술연구소 생기연논문집 Vol.19 No.1
A kinetic model, considering the inhibition effects of both the substrate and the product was developed for the hydrolysis of U.K.P. by cellulose from Trichoderma reesei QM 9414. When the initial concentrations became over 25 G/L and 7.8 G/L for cellulose and cellobiose respectively, the substrate inhibition was observed to be significant. In this paper, the kinetic constants such as Michaelis-Menten constant, the maximum reaction velocity and the inhibition constant, were presented for each reaction; cellulose to cellobiose and cellobiose to glucose. Also the theoretically computed concentrations of the substrate and product with the kinetic constants were in good agreement with the obtained experimental ones until the 24 hours of reaction time.