基于电-化-热耦合理论对称双阴极固体氧化物燃料电池堆的电流与温度场数值模拟
收稿日期: 2019-11-01
修回日期: 2020-02-18
网络出版日期: 2020-03-27
基金资助
国家重点研究开发项目No(2018YFB1502600);国家自然科学基金重点项目No(11932005);宁波市重大攻关项目No(2018B10048);浙江省能源集团有限公司科技项目资助No(ZNKJ-2018-008)
Numerical Simulations of Current and Temperature Distribution of Symmetrical Double-Cathode Solid Oxide Fuel Cell Stacks Based on the Theory of Electric-Chemical-Thermal Coupling
Received date: 2019-11-01
Revised date: 2020-02-18
Online published: 2020-03-27
俞成荣 , 朱建国 , 蒋聪盈 , 谷宇晨 , 周晔欣 , 李卓斌 , 邬荣敏 , 仲政 , 官万兵 . 基于电-化-热耦合理论对称双阴极固体氧化物燃料电池堆的电流与温度场数值模拟[J]. 电化学, 2020 , 26(6) : 789 -796 . DOI: 10.13208/j.electrochem.191105
Solid oxide fuel cell (SOFC) is a high-efficient clean conversion device for future energy management. Because of the low antioxidant reduction ability and complex thermal stress, the structure of traditional asymmetrical thin anode-supported planar SOFC is easily to be broken under stack operating conditions. To overcome these defects, a new complete symmetrical SOFC based on double-sided cathodes was developed. To study the influences of gas flow direction and current collection mode on the cell performance inside stack, a numerical model was established by finite element method based on the theory of electro-thermo-chemo multiphysical coupling. By applying this model, the molar fraction of gas components, current density distribution and temperature distribution in the co-flow side and the counter flow side inside a stack are calculated, and the influences of the cathodic flow mode on the gas components and cell performance are discussed. In addition, the current distribution of the cell under the unilateral current collection mode is simulated, and its effect on the cell performance inside a stack is analyzed. The results show that the current density and temperature distribution on the electrolyte are affected by the flow direction and the current collection model. Large current density distributions are observed at gas inlet and outlet. The temperature distribution on the electrolyte layer under the co-flow model is more uniform than that under the counter flow direction. The average current density on the current collecting side is higher than that on the other side under the single current collection mode. It is also found that the current density and temperature distribution on the electrolyte layer can be effectively improved by reducing the resistance of cathodic cover plate. Moreover, the current collecting position will affect the path of electrons. Thus, optimization of the current collecting position can also contribute to improve the cell output performance inside a stack. This work provides a reference for improving the electric power density and operation life of the double-sided SOFC stack.
| [1] | Lü Y(吕尧), Huang B(黄波), Gu X Z(顾习之), et al.Fabrication and characterization of the Ni-ScSZ composite anodes with a Cu-LSCM-CeO2 catalyst layer in the thin film SOFC[J]. Journal of Electrochemistry(电化学), 2014, 20(5): 470-475 |
| [2] | Chen H L(陈华林), Wang Z Y(王志勇), Jin X B(金先波), et al.An ionic diffusion model for the solid oxide cathode and its verification by the electrolysis of Ta2O5 in molten CaCl2[J]. Journal of Electrochemistry(电化学), 2014, 20(3): 266-271. |
| [3] | Hashimoto S, Nishino H, Liu y, et al. The electrochemical cell temperature estimation of micro-tubular SOFCs during the power generation[J]. Journal of Power Sources, 2008. 181(2): 244-250. |
| [4] | Guan W B, Zhai H J, Jin L, et al.Temperature measurement and distribution inside planar SOFC stacks[J]. Fuel Cells, 2012. 12(1): 24-31. |
| [5] | Guk E, Venkatesan V, Sayan Y, et al.Spring based connection of external wires to a thin film temperature sensor integrated inside a solid oxide fuel cell[J]. Scientific Reports, 2019, 9(1): 2161. |
| [6] | Zeng S, Xu M, Parbey J, et al.Thermal stress analysis of a planar anode-supported solid oxide fuel cell: Effects of anode porosity[J]. International Journal of Hydrogen Energy, 2017, 42(31): 20239-20248. |
| [7] | Shen Q, S L, Wang B W. Numerical simulation of the effects of obstacles in gas flow fields of a solid oxide fuel cell[J]. International Journal of Electrochemical Science, 2019, 14(2): 1698-1712. |
| [8] | Bhattacharya D, Mukhopadhyay J, Biswas N, et al.Performance evaluation of different bipolar plate designs of 3D planar anode-supported SOFCs[J]. International Journal of Heat and Mass Transfer, 2018, 123: 382-396. |
| [9] | Schluckner C, Subotic V, Preissl S, et al.Numerical analysis of flow configurations and electrical contact positions in SOFC single cells and their impact on local effects[J]. International Journal of Hydrogen Energy, 2019, 44(3): 1877-1895. |
| [10] | Liu W, Zou Z W, Miao F X, et al.Anode-supported planar solid oxide fuel cells based on double-sided cathodes[J]. Energy Technology, 2019, 7(2): 240-244. |
| [11] | Andersson M, Yuan J L, Sundén , et al. SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants[J]. Journal of Power Sources, 2013,232: 42-54. |
| [12] | Zeng S, Yu G S, Parbey J, et al.Effect of the electrochemical active site on thermal stress in solid oxide fuel cells[J]. Journal of The Electrochemical Society, 2018, 165(2): F105-F113. |
| [13] | Li J Y, Lin Z J.Effects of electrode composition on the electrochemical performance and mechanical property of micro-tubular solid oxide fuel cell[J]. International Journal of Hydrogen Energy, 2012, 37(17): 12925-12940. |
| [14] | Xu H R, Chen B, Liu J, et al.Modeling of direct carbon solid oxide fuel cell for CO and electricity cogeneration[J]. Applied Energy, 2016, 178: 353-362. |
| [15] | Jiang C Y, Gu Y C, Guan W B, et al.3D thermo-electro-chemo-mechanical coupled modeling of solid oxide fuel cell with double-sided cathodes[J]. International Journal of Hydrogen Energy, 2020, 45(1): 904-915. |
| [16] | Liu X, Hao X h, An A, et al. Numerical simulation and analysis of plate solid oxide fuel cell[J]. Acta Energiae Solaris Sinica, 2014, 35(10): 1869-1875. |
| [17] | Saied M, Ahmed K, Ahmed M, et al.Investigations of solid oxide fuel cells with functionally graded electrodes for high performance and safe thermal stress[J]. International Journal of Hydrogen Energy, 2017, 42(24): 15887-15902. |
| [18] | Chan S H, Khor K A, Xia Z T.Complete polarization model of a solid oxide fuel cell and its sensitivity to the change of cell component thickness[J]. Journal of Power Sources, 2001, 93(1): 130-140. |
| [19] | Yakabe H, Hishinum M, Uratani M, et al.Evaluation and modeling of performance of anode-supported solid oxide fuel cell[J]. Journal of Power Sources, 2000, 86(1): 423-431. |
| [20] | Xu M, Li T S, Yang M, et al.Modeling of an anode supported solid oxide fuel cell focusing on thermal stresses[J]. International Journal of Hydrogen Energy, 2016, 41(33): 14927-14940. |
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