In this paper, the PEMFC performance was studied using three dimensional numerical analysis. The effect of GDL porosity and cathode inlet humidity on the cell polarization curve was analyzed. The GDL porosity of 0.3, 0.5, 0.7 and cathode inlet humidity of 20, 40, 60, 80, 100 percent were selected as simulation cases while the anode inlet humidity was maintained as 100 percent. For a constant cell voltage condition, the highest current density was obtained at GDL porosity of 0.7 and cathode inlet humidity of 20 percent. As GDL porosity increases, the amount of hydrogen diffusion to membrane from the anode increases and chemical reaction also increases. As cathode inlet humidity decreases, oxygen mass fraction of cathode gas channel increases and chemical reaction also increases.

Abstract
 1. 서론
 2. 연구 방법
  2.1 수치해석 모델
  2.2 계산 조건
 3. 결과 및 토의
  3.1 상대습도에 따른 성능분석
  3.2 기공률에 따른 성능분석
 4. 결론
 후기
 참고문헌

• 소재현(공주대학교 대학원 에너지시스템공학과) | Jae Hyun So
• 이찬규(공주대학교 대학원 기계공학과) | Chan Kyu Lee
• 김우태(공주대학교 기계자동차공학부) | Woo Tae Kim 교신저자