http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
CFD 코드에서 제공되는 정보를 이용한 석탄 연소 모델링에서 탄종과 탈휘발 모델에 따른 영향 고찰
이후경(Hookyung Lee),최상민(Sangmin Choi) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.41
In this study, the relation between coal combustion and modeling of the phenomena is discussed. Coal combustion modeling in general CFD code is considered as one of the methods to the modeling. Information provided by the CFD code for coal combustion modeling is interpreted, especially, in terms of coal classification, pyrolysis, one-step combustion of volatile matter, and char oxidation. For quantitative comparison, simple coal combustion modeling is studied using the information provided by CFD code. As a result of the evaluation, effects of coal type and pyrolysis model on temperature and oxygen concentration distributions are considered. The results show different trends according to each model and therefore modeling coal combustion should be carefully considered.
산업용 로 내 고체 미립자의 거동 예측을 위한 유동-고체입자 간 비산에 관한 실험과 해석
이후경(Hookyung Lee),엄민제(Minje Eum),최상민(Sangmin Choi) 한국연소학회 2012 KOSCOSYMPOSIUM논문집 Vol.- No.44
In the industrial furnaces or reactors, entrainment of the material particles is one of the important issues from the point of view of efficient material-use. The particles of solid phase which has submicron unit are easily entrained with gas phase as a reacting agent or product, and it causes a loss of the material. In this study, wind-tunnel experiment is carried out to interpret the distribution of the particles entrained along the tunnel length. Through CFD-based computational analysis of the experiment, availability of result from the CFD analysis associated with particle size distribution and gaseous velocity to practical system is evaluated.
중저온 배열 활용을 위한 암모니아-물 혼합물을 작동유체로 하는 600㎾ 발전 사이클의 열역학적 해석
이후경(Hookyung Lee),최상민(Sangmin Choi),조한창(Hanchang Cho) 한국연소학회 2011 KOSCOSYMPOSIUM논문집 Vol.- No.43
This study investigates a Kalina cycle using low-temperature waste heat sources to produce 600㎾ power. The cycles using ammonia-water binary mixture as a working fluid have attracted much attention over past three decades. Kalina cycle system (KCS) 11 is investigated as a target system using a process analysis code. The performance evaluation of the system is interpreted with thermal efficiency. Effect of the system parameters, such as mass fraction of ammonia in the mixture, turbine inlet temperature, and pressure of the working fluid, are parametrically investigated.
석탄화력 발전용 순환유동층 보일러 내 고온 증기부 운전의 동특성 이해와 응용
이후경(Hookyung Lee),김효준(Hyojun Kim),김영운(Youngoon Kim),이기현(Kihyun Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
In a thermal plant for power generation, transient behavior caused by load changes is largely controlled by a firing rate of fuel and a feeding rate of water. Different time constants in the boiler system which is composed of the complex configuration of heating surfaces lead considerable response time. The CFB boiler is one of the alternatives for environmental regulations aimed at controlling air emissions at coal-fired power plants. According to the previous presentation results associated with air/gas side in the CFB furnace, this paper reports dynamic simulation and analysis results for thermal process design of water/steam side in the back-pass part of the CFB boiler. The deviation between simulated results and design values is acceptable in engineering application. Finally, the CFB boiler module will be connected on the computational domain of our own dynamic plant simulation tool. It may provide strong support for the furnace and back-pass design in ultra-supercritical CFB boiler system ultimately.