Optimization of Structure for MOLB-type Solid Oxide Fuel Cell

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Optimization of Structure for MOLB-type Solid Oxide Fuel Cell

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[1]JIN Zunlong,YANG Lei,HUO Dongfang,et al.Optimization of Structure for MOLB-type Solid Oxide Fuel Cell[J].Journal of Zhengzhou University (Engineering Science),2023,44(04):35-40,53.[doi:10.13705/j.issn.1671-6833.2023.01.008]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 44卷 Number of periods: 2023 04 Page number: 35-40,53 Column: Public date: 2023-06-01

Title:: Optimization of Structure for MOLB-type Solid Oxide Fuel Cell

Author(s):: JIN Zunlong¹; YANG Lei¹; HUO Dongfang²; LIU Yang²; FAN Shengliang¹; 1.School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, 2.Henan, Huaneng Henan Zhongyuan Gas Power Power Co., Ltd., Henan Zhumadian 463000

Keywords:: MOLB-type SOFC; rib width; cathode thickness; performance; activation polarization

CLC:: TM911.42

DOI:: 10.13705/j.issn.1671-6833.2023.01.008

Abstract:: A typical three-dimensional model of MOLB-type SOFC was developed, and the solution was based on the finite element method. In view of the problem of uneven distribution of reactants in porous electrode and limited output performance, the effects of rib widths and cathode thicknesses on the mole fraction distribution of gas, temperature distribution, performance curve and polarization of the MOLB-type SOFC were investigated with the aim of improving the mass transfer in the porous electrode and enhancing the output power. The results showed that the ratio of the rib width to the cathode thickness λ has an important effect on the mass transfer of gas in porous electrode and the output performance of the cell. The smaller rib width is conducive to the full diffusion of the reactants in the porous electrode, which can improve the uniformity of gas distribution, reduce the concentration polarization of the cell, and improve the output performance of SOFC. As the cathode thickness increases, the temperature of SOFC increases, which reduces the activation polarization and improves the performance of SOFC. Considering the synergistic effect of rib width and cathode thickness on SOFC performance, it is found that a small value of λ can improve the uniformity of the gas distribution in the electrode, reduce the total polarization loss of SOFC, and improve the output performance of the cell. When λ decreases from 10 to 3. 33, the maximum output power density of SOFC increases by 53. 68%.

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Last Update: 2023-06-30