한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제23권1호
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  • Pages.8-18
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  • 2012
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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자동차용 고분자전해질형연료전지 스택에서의 막-전극접합체 설계인자가 저온시동에 미치는 영향성 연구

Analyzing the Effects of MEA Designs on Cold Start Behaviors of Automotive Polymer Electrolyte Fuel Cell Stacks

  • Gwak, Geon-Hui (School of Mechanical Engineering, Inha University) ;
  • Ko, Jo-Han (School of Mechanical Engineering, Inha University) ;
  • Ju, Hyun-Chul (School of Mechanical Engineering, Inha University)
  • 투고 : 2012.01.30
  • 심사 : 2012.02.24
  • 발행 : 2012.02.28
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초록

This paper presents a three-dimensional, transient cold-start polymer electrolyte fuel cell (PEFC) model to numerically evaluate the effects of membrane electrode assembly (MEA) design and cell location in a PEFC stack on PEFC cold start behaviors. The cold-start simulations show that the end cell experiences significant heat loss to the sub-freezing ambient and thus finally cold-start failure due to considerable ice filling in the cathode catalyst layer. On the other hand, the middle cells in the stack successfully start from $-30^{\circ}C$ sub-freezing temperature due to rapid cell temperature rise owing to the efficient use of waste heat generated during the cold-start. In addition, the simulation results clearly indicate that the cathode catalyst layer (CL) composition and thickness have an substantial influence on PEFC cold-start behaviors while membrane thickness has limited effect mainly due to inefficient water absorption and transport capability at subzero temperatures.

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참고문헌

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