가습조건이 사형유로를 채택한 고분자 전해질 연료전지의 성능에 미치는 영향에 대한 전산유체역학 해석 연구 (Computational Fluid Dynamics Study on Performance Variation of PEMFC with Serpentine Flow Fields According to Humidity Condition)

서지정보

· 발행기관 : 대한기계학회
· 수록지 정보 : 대한기계학회논문집 B / 33권 / 8호 / 604 ~ 612페이지
· 저자명 : 오규환, 이규진, 김찬중, 남진현

초록

Water management has been recognized as a crucial factor for achieving better performance and stability in polymer electrolyte membrane fuel cells (PEMFCs). Proper water management should provide favorable water conditions, including the local humidity, membrane water content, and liquid
water saturation in PEMFCs, thereby leading to more uniform electrochemical reaction and current generation. In this study, computational fluid dynamics (CFD) simulation was conducted to investigate the effects of the cathode relative humidity (RH) on the performance of a 3 by 3 cm2 PEMFC with
serpentine flow fields. The CFD results showed that the best performance of the PEMFC was obtained for the cathode RH of 80%, but the performance variation was small for the cathode RH range of 60~100%. However, the loss of the PEMFC performance was significant when the cathode RH was
reduced below 40%. The reason for such performance variation was investigated through the detailed inspection of ohmic loss, activation and concentration overpotential, and water and current distributions.

영어초록

Water management has been recognized as a crucial factor for achieving better performance and stability in polymer electrolyte membrane fuel cells (PEMFCs). Proper water management should provide favorable water conditions, including the local humidity, membrane water content, and liquid
water saturation in PEMFCs, thereby leading to more uniform electrochemical reaction and current generation. In this study, computational fluid dynamics (CFD) simulation was conducted to investigate the effects of the cathode relative humidity (RH) on the performance of a 3 by 3 cm2 PEMFC with
serpentine flow fields. The CFD results showed that the best performance of the PEMFC was obtained for the cathode RH of 80%, but the performance variation was small for the cathode RH range of 60~100%. However, the loss of the PEMFC performance was significant when the cathode RH was
reduced below 40%. The reason for such performance variation was investigated through the detailed inspection of ohmic loss, activation and concentration overpotential, and water and current distributions.

참고자료

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