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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Numerical Analysis on Performance Changes of the Tubular SOFCs according to Current Collecting Method

전류집전 방법에 따른 원통형 고체산화물 연료전지의 성능 변화 수치해석

  • Yu, Geon (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Park, Seok-Joo (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Jong-Won (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Seung-Bok (Department of Mechanical Engineering, Korea Univ.) ;
  • Lim, Tak-Hyoung (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Song, Rak-Hyun (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Shin, Dong-Ryul (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Kim, Ho-Young (Department of Mechanical Engineering, Korea Univ.)
  • Received : 2011.02.11
  • Accepted : 2011.04.22
  • Published : 2011.04.30
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Abstract

Performance changes of an anode-supported tubular SOFC including current collectors are analyzed at different current collecting methods using numerical simulation. From the two dimensional numerical model of the solid oxide fuel cell with nickel felts as anodic current collectors and silver wires as cathodic ones, the performance curves and the distributions of temperature, concentration, current density are obtained. Also, the voltage loss of the cell is divided into three parts: activation loss, concentration loss and ohmic loss. The results show that the performance change of the cell is dominantly influenced by the ohmic loss. Although the temperature and concentration distributions are different, the total activation loss and concentration loss are nearly same. And the ohmic loss is divided into each parts of the cell components. The ohmic loss of the anodic current collectorreaches about 60~80% of the cell's total ohmic loss. Therefore, the reduction of the ohmic loss of the anodic current collector is very important for stack power enhancement. It is also recommended that the load should be connected to the both ends of the anodic current collector.

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References

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