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Simulink를 이용한 고분자 전해질 연료전지 시스템 시뮬레이션
황남선(Hwang, Nam-Sun),이호준(Lee, Ho-Jun),주병수(Ju, Byung-Su) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
In this paper, a mathematical modeling was developed to simulate 1kW class air cooled Polymer Electrolyte Membrane Fuel Cell(PEMFC) system. The proposed modeling was conducted under SIMULINK based environment. The model ing was developed based on the thermodynamic and chemical equilibrium. The objective is to design and implement the entire fuel cell system model ing including the system controller modeling. The fuel cell process and the control system modeling should have to be connected with each other simultaneously, therefore the two types of modeling influences each other when the system simulator run. The fuel cell modeling libraries are simulated using the SIMULINK under the thermodynamic and chemical equilibrium base. The PID controller application was designed and developed to test the process modeling and verify it. This the prototype development of the fuel cell system to design and test more complicate fuel cell systems, like the residential power generation system. The simulation results was compared to the real PEMFC system performance. We have achieved the reasonable accordance with the Lab test and the simulation results.
문서분류용 목적으로 이용할 효율적인 연상정보의 추출방법
최현(Hyun Choi),황남선(Namseon Hwang),이상곤(Samuel Sangkon Lee) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.1B
분야연상어는 어휘자체가 분야정보를 가지므로 인간이 분야를 인지할 때와 유사하게 문서의 분야를 판단 한다. 인간이 한국어와 일본어의 180분야로 분류한 약 15,000개의 문서뱅크를 수집하고, 수집된 문서에서 복합어로 구성된 분야연상어의 효율적인 추출 알고리즘을 제안한다. 제안된 알고리즘으로 자동구축된 분야연상어를 문서분류의 초기결정에 이용할 수 있다. 분야연상어를 이용하면 어떠한 분야체계에도 손쉽게 적용할 수 있으므로 문서분류용 목적으로 이용할 수 있는 보편성은 충분하다.
김기영(Kim, Ki-Young),황남선(Hwang, Nam-Sun),공민석(Kong, Min-Seok),김희수(Kim, Hee-Su),오시덕(Oh, Si-Doek) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Fuel cell with high electric efficiency has many probabilities of commercial use. Especially, polymer electrolyte or proton exchange membrane fuel cell (PEMFC) which is a low operating temperature and has less influence on CO₂ concentration is considered the power generation system of small building and household. We calculated the optimal operational plans of 1 kW household PEMFC power system based on daily electric and heat demand patterns of various size of apartments. Calculated results show that the economic feasibility of PEMFC power system is very sensitive to the cost policy of electricity and natural gas.
이호준(Lee, Ho-Jun),이정민(Lee, Jung-Min),황남선(Hwang, Nam-Sun),최동민(Choi, Dong-Min),이종욱(Lee, Jong-Wook),오시덕(Oh, Si-Doek) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
HYOSUNG manufactured and tested 1kW class PEFC systems to generate electrical and thermal energy for each residential usage. In particular, HYOSUNG developed power conditioning system that performs over 91% electrical conversion ratio specified in 1kW class PEFC systems. Prior to system integration, we tested each performances of components to derive control issues from it. In addition, we have been developing the adequate simulator to describe and predict system performance. In this paper, we verified HYOSUNG's 1kW class PEFC systems are valid for residential energy sources by testing the characteristics of systems and performances of main components.