• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (10): 76-84.doi: 10.3901/JME.2023.10.076

Previous Articles     Next Articles

Creep Damage of Planar Solid Oxide Fuel Cell with Different Arrangements of Flow Channels

SONG Ming1, MA Shuai1, DU Chuansheng2, JIANG Wenchun3, WANG Bingying2   

  1. 1. College of Pipeline and Civil Engineering, China University of Petroleum(East China), Qingdao 266580;
    2. College of Materials Science and Engineering, China University of Petroleum(East China), Qingdao 266580;
    3. College of New Energy, China University of Petroleum(East China), Qingdao 266580
  • Received:2022-07-07 Revised:2022-10-12 Online:2023-05-20 Published:2023-07-19

Abstract: During the long-time operation of solid oxide fuel cell(SOFC) under high temperature condition, creep deformation of component of SOFC is inevitable and will lead to damage and crack. Different fuel-air-channel designs will have significant impacts on the creep damage of SOFC. A multiphysics-coupled model of planar SOFC is developed. The non-uniform temperature distribution calculated by multiphysics-coupled finite element model in COMSOL is applied to ABAQUS model as a heat load. Based on Wen-Tu creep ductility depletion model, a creep damage subroutine is developed to study the creep behavior of planar SOFC under the fuel-air-channel designs of co-flow, counter-flow and cross-flow. The results show that the creep damage of the planar SOFC reaches the critical value after 19 800 h, 24 000 h and 78 500 h of operation in the co-flow, the counter-flow and the cross-flow channel designs, respectively. Besides, among the channel designs mentioned above, the creep crack initiation is located at the upper interconnector. After 50 000 h of operation, there are two cracks and four cracks occurred in the co-flow and the counter-flow designs, respectively. However, there is no crack occurred in the condition of cross-flow channel design. The operation life of planar SOFC can be maximized by applying the cross-flow channel design. The conclusion can provide an important theoretical basis for the optimization design of planar SOFC to achieve long-term, efficient and stable operation.

Key words: multiphysics coupled, creep and damage, non-uniform temperature distribution, crack initiation

CLC Number: