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유상필(S. P. Yu),엄석기(S. Um),박구곤(G. G. Park),김민진(M. J. Kim),임성대(S. D. Yim),조중원(J. W. Cho),이원용(W. Y. Lee),김창수(C. S. Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
PEMFC(polymer electrolyte membrane fuel cell) is a promising solution for H₂ energy society. Especially, residential PEMFC system has been developed competitively for its relatively easier proliferation with existing natural gas supply network. We have developed 1㎾ residential PEMFC system with natural gas reformer and tested for its performance and endurability corroboratively.
주택용 연료전지 연료전지 운전방법에 따른 계간 성능 분석
이원용(W.-Y. Lee),정귀성(K.-S. Jeong),손영준(Y.-J. Sohn),엄석기(S.-K. Um),황정태(J.-T. Hwang),김창수(C-S Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Fuel cell systems(FCSs) have potential to achieve a financial and environmental advantage over competing technologies. For use in residences and buildings FCSs can provide useful heating/hot water and electricity generation at a high overall efficiency. In this study, a 1.5Kw-class Polymer electrolyte fuel cell system(PEFCS) with a battery pack has been modelled and simulated. Its electric conversion efficiency and heat recovery performance are highly dependent on the seasonal thermal and electric load of a residence. Seasonal average fuel saving rates are calculated to find proper load management methods. The scheme can be used to determine the optimal capacity and operating strategies of PEFCS.
김동하(D.-H. Kim),함미숙(M.-S. Ham),김민진(M. Kim),유상필(S. P. Yu),엄석기(S. Um),이원용(W.-Y. Lee),김창수(C.-S. Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The fuel cell for a submarine is a closed system and therefore the unreacted hydrogen and oxygen are supposed to be recycled and reused. Generally, the compressors, the blowers, the pumps and the ejectors have been used as the recirculation equipment of a fuel cell system. In case of the vehicle application, the ejector which does not require any parasitic power is good for the performance of the fuel cell system. The ejector has been applied to a solid oxide fuel cell (SOFC) from now on. In case of SOFC, the ejector is designed to maintain the pressure required in fuel cell by compensating the pressure drop in the anode channel. However, the existing research works do not consider about the humidified hydrogen and oxygen which is occurred by electrochemical reaction at proton exchange membrane fuel cell (PEMFC). Unlike dry air, the humidified hydrogen and oxygen shows very complex behaviours in suction chamber and constant-area section. In this study, the ejector for the PEMFC used to the submarine is designed taking into account the property of the gas mixed with vaporized water and hydrogen/oxygen. Consequently, the designed ejector shows the optimal performance within the predefined operating conditions at the PEMFC for a submarine.