Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Study on Optimization of Operating Conditions for High Temperature PEM Fuel Cells Using Design of Experiments

실험계획법을 이용한 고온 고분자 전해질 막 연료전지의 운전조건 최적화 연구

  • Kim, Jintae (Hydrogen and Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Kim, Minjin (Hydrogen and Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Sohn, Youngjun (Hydrogen and Fuel Cell Research Center, Korea Institute of Energy Research)
  • 김진태 (한국에너지기술연구원 수소연료전지연구단) ;
  • 김민진 (한국에너지기술연구원 수소연료전지연구단) ;
  • 손영준 (한국에너지기술연구원 수소연료전지연구단)
  • Received : 2012.12.28
  • Accepted : 2013.02.28
  • Published : 2013.02.28
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Abstract

High temperature proton exchange membrane fuel cells (PEMFCs) using phosphoric acid (PA) doped polybenzimidazole (PBI) membranes have been concentrated as one of solutions to the limits with traditional low temperature PEMFCs. However, the amount of reported experimental data is not enough to catch the operational characteristics correlated with cell performance and durability. In this study, design of experiments (DOE) based operational optimization method for high temperature PEMFCs has been proposed. Response surface method (RSM) is very useful to effectively analyze target system's characteristics and to optimize operating conditions for a short time. Thus RSM using central composite design (CCD) as one of methodologies for design of experiments (DOE) was adopted. For this work, the statistic models which predict the performance and degradation rate with respect to the operating conditions have been developed. The developed performance and degradation models exhibit a good agreement with experimental data. Compared to the existing arbitrary operation, the expected cell lifetime and average cell performance during whole operation could be improved by optimizing operating conditions. Furthermore, the proposed optimization method could find different new optimal solutions for operating conditions if the target lifetime of the fuel cell system is changed. It is expected that the proposed method is very useful to find optimal operating conditions and enhance performance and durability for many other types of fuel cell systems.

Keywords

References

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