무인항공기용 200W 급 직접메탄올연료전지 경량화 스택 제작 및 작동 특성 연구 (II)

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 23; no. 3; pp. 243 - 249
• Main Authors: 강경문(Kyung Mun Kang), 박성현(Sung Hyun Park), 곽건희(Geon Hui Gwak), 지현진(Hyun Jin Ji), 주현철(Hyun Chul Ju)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2012
• Subjects: 기계공학; 직접메탄올연료전지; Direct methanol fuel cell(DMFC); 연료전지 스택; 메탄올 크로스오버; Methanol crossover; Unmanned aerial vehicle(UAV); Fuel cell stack; 무인비행기
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2012.23.3.243

A lightweight 200W direct methanol fuel cell (DMFC) stack is designed and fabricated to power a small scale Unmanned Aerial Vehicle (UAV). The DMFC stack consists of 33-cells in which membrane-electrode assemblies (MEAs) having an active area of 88 $cm^2$ are sandwiched with lightweight composite bipolar plates. The total stack weight is around 3.485 kg and stack performance is tested under various methanol feed concentrations. The DMFC stack delivers a maximum power of 248 W at 13.2 V and $71.3^{\circ}C$ under methanol feed concentration of 1.2 M. In addition, the voltage of individual cell in the 33-cell stack is measured at various current levels to ensure the stability of DMFC stack operations. The cell voltage distribution data exhibit the maximum cell voltage deviation of 28 mV at 15 A and hence the uniformity of cell voltages is acceptable. These results clearly demonstrate that DMFC technology becomes a potential candidate for small-scale UAV applications.