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Tugirumubano, Alexandre,Shin, Hee-Jae,Go, Sun-Ho,Lee, Min-Sang,Kwac, Lee Ku,Kim, Hong-Gun Korean Society for Precision Engineering 2016 International Journal of Precision Engineering and Vol.17 No.8
A polymer electrolyte membrane (PEM) water electrolysis, where the water is supplied to cathode, was presented in this study. For water feeding and electric collection, four holed titanium plates were designed with different shape of holes which are either circular or square for a chosen spacing. Depending on plate design, a numerical analysis of PEM electrolyzer cell was performed under stationary study, and the results were compared on polarization curve. The results revealed that, at the same operating conditions the plate with square shape of holes could result in lower cell voltage than the circular shape. Moreover, the more the holes are close to each other, the better is the cell performance. The best suitable ratio between the holes and non-opening area was found to be approximately 2:1. The impact of operating temperature on the best optimum plate design indicated through simulation that the increase of operating temperature lead to the reduction of cell overpotential, and as the temperature rises, the voltage difference gets larger with the increase of current. The optimized design of titanium plate was validated with experimental study, which showed very good agreement with simulation results for current above 1A.
The Design and Performance Study of Polymer Electrolyte Membrane Using 3-D Mesh
Tugirumubano, Alexandre,Kim, Kyoung Soo,Shin, Hee Jae,Kim, Chang Hyeon,Kwac, Lee Ku,Kim, Hong Gun Trans Tech Publications, Ltd. 2017 Key Engineering Materials Vol.737 No.-
<P>The production of hydrogen and oxygen using the water electrolysis technology is mostly influenced by the performance and efficiency of the components that are used in the production systems. In this study, the flow field’s channels of the bipolar plates of polymer electrolyte membrane electrolyzer were replaced by 3-D titanium mesh, and the polymer electrolyte membrane (PEM) electrolyzer cell that uses 3-D titanium mesh was designed. A numerical analysis was conducted to study the performance of the designed model. By comparing the results with the electrochemical performance of PEM electrolyzer cell with flow field channels on the plates, it was found that the cell with 3-D titanium mesh has greater performance and higher total power dissipation density. Therefore, the use of 3-D mesh can be used instead of machining the flow field channels on the bipolar plates.</P>
정훈,임애란,( Tugirumubano Alexandre ),고미지,임성택,주덕현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
승용차의 고급화 추세에 따라 사용되는 모터의 수요가 지속적으로 증가되어 승용차 한 대당 20~30여 개의 모터가 사용되고 있으며 모터는 영구자석을 고정자로 금속코일을 회전자로 사용하기 때문에 자동차의 중량증가에 미치는 영향이 커서 자동차의 연비에 영향을 주고 있음. 최근 친환경 자동차의 개발에 있어서 탄소복합소재를 이용한 경량화와 동시에 하이브리드 및 전기자동차의 자동차의 개발연구가 활발히 진행되고 있음. 하지만 탄소복합소재를 이용한 하이브리드 및 전기 자동차의 전체 무게 중 구동모터가 차지하는 무게 비중이 커 자동차의 연비를 개선하기 위하여 모터의 경량화 기술이 필요한 실정임. 이에 본 연구에서는 높은 전기전도도를 갖는 탄소섬유와 금속과 Graphite의 하이브리드 물질을 이용하여 기존 동선과 계자철심을 대체한 차세대 모터의 개발을 통하여 높은 자속밀도 및 고강도 경량 특성을 갖는 차세대 계자의 개발을 목표로 함.