A three dimensional numerical analysis was performed to study the effect of cathode inlet relative humidity on PEMFC performance characteristics. As cathode inlet relative humidity increases from 0 percent to 60 percent, the current density increases. Then, as cathode inlet relative humidity increases from 60 percent to 100 percent, the current density decreases. The two dimensional contour map analysis shows that the flooding phenomenon in cathode gas channel, gas diffusion layer, and catalyst layer leads to the decrease of current density.

Abstract
 1. 서론
 2. 연구 방법
  2.1 수치해석 모델
  2.2 계산 조건
 3. 결과 고찰 및 분석
  3.1 Cathode 입구상대습도의 변화
 4. 결론
 후기
 References

• 조재혁(공주대학교 대학원 기계공학과) | Jae Hyuk Jo
• 김우태(공주대학교 기계자동차공학부) | Woo Tae Kim Corresponding Author