In this paper, a three dimensional numerical analysis tool was applied to study the PEMFC performance characteristics. The porosity and electrical conductivity of GDL and CL as well as the relative humidity of anode and cathode channel gas were selected as simulation parameters. As the porosity of GDL and CL increases, current density and temperature increase because reactant gases diffuse well. As the electrical conductivity of GDL and CL increases, current density and temperature increase due to increased electron transfer rate. As anode relative humidity increases, current density and temperature increase. Unlike anode, current density and temperature increase when cathode relative humidity increases from 0 percent to 60 percent. Then current density and temperature decrease when cathode relative humidity increases from 60 percent to 100 percent.

ABSTRACT
 1. 서론
 2. 연구 방법
  2.1 수치해석 모델
  2.2 계산 조건
 3. 결과 및 분석
  3.1 상대습도의 영향
  3.2 기공률의 영향
  3.3 전기전도도의 영향
 4. 결론
 참고문헌

• 김우태(공주대학교 기계자동차공학부) | Woo Tae Kim 교신저자
• 조재혁(공주대학교 기계자동차공학부) | Jae Hyuk Jo