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압력조건의 변화에 따른 PEMFC의 성능 시뮬레이션 및 설계에 관한 연구
김홍건(H. G. Kim),김유신(Y. S. Kim),김홍열(H. Y. Kim),양성모(Y. M. Yang),나석찬(S. C. Nah) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
Fuel cells are devices that convert chemical energy directly into electrical energy. Among many kinds of the fuel cell, Polymer electrolyte membrane fuel cell is such kind of thing which work under low temperature. Unfortunately, there are still many problems to be solved in order to make them into commercial use, such as the thermal and water management in working process of Polymer electrolyte membrane fuel cell. To solve the difficulties facing the researcher, the analysis of the inner mechanism of Polymer electrolyte membrane fuel cell should be implement as much as possible, mathematical modeling is an important tool for the reach of the fuel cell especially with the combination of experiment. By regarding some of the assumptions and simplifications, using the finite element technique, a two-dimensional electrochemical mode is created in this paper for the further comparison with experiment data. Based on the principals of the problem, the equation of electronic charge conservation equation, gas-phase continuity equation, and mass balance equation are used in calculating. In the end, the model results indicate the some of the phenomenon in the unit cell, and the relationships of potential and current density.
김홍건(H. G. Kim),고범용(B. Y. Go),강영우(Y. W. Kang),박명모(M. M. Park) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
This study did the grinding processing of a carbon-ceramic disc and found out the processing characteristic. The grinding processing used the diamond resin wheel and processed. A wear of the diamond wheel and Load are big but are the stability relatively. The width of the change of a surface roughness is small. Therefore Grinding characteristics got good result.