Influence of Thermal Conductivity on the Thermal Behavior of Intermediate-Temperature Solid Oxide Fuel Cells

被引:3
作者
Aman, Nurul Ashikin Mohd Nazrul [1 ]
Muchtar, Andanastuti [1 ,2 ]
Rosli, Masli Irwan [3 ]
Baharuddin, Nurul Akidah [1 ]
Somalu, Mahendra Rao [1 ]
Kalib, Noor Shieela [1 ,4 ]
机构
[1] Univ Kebangsaan Malaysia, Fuel Cell Inst, Ukm Bangi 43600, Selangor, Malaysia
[2] Univ Kebangsaan Malaysia, Fac Engn & Built Environm, Ctr Mat Engn & Smart Mfg MERCU, Ukm Bangi 43600, Selangor, Malaysia
[3] Univ Kebangsaan Malaysia, Fac Engn & Built Environm, Ctr Sustainable Proc Technol CESPRO, Bangi 43600, Selangor, Malaysia
[4] Heriot Watt Univ Malaysia, Sch Engn & Phys Sci, Precinct 5, Putrajaya 62200, Malaysia
关键词
Computational Fluid Dynamics; Modeling; SOFC; Thermal Conductivity; Thermal Behavior; PERFORMANCE EVALUATION; POWER-DENSITY; ELECTROLYTE; SIMULATION; STRESS; DESIGN;
D O I
10.33961/jecst.2019.00276
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Solid oxide fuel cells (SOFCs) are among one of the promising technologies for efficient and clean energy. SOFCs offer several advantages over other types of fuel cells under relatively high temperatures (600 degrees C to 800 degrees C). However, the thermal behavior of SOFC stacks at high operating temperatures is a serious issue in SOFC development because it can be associated with detrimental thermal stresses on the life span of the stacks. The thermal behavior of SOFC stacks can be influenced by operating or material properties. Therefore, this work aims to investigate the effects of the thermal conductivity of each component (anode, cathode, and electrolyte) on the thermal behavior of samarium-doped ceria-based SOFCs at intermediate temperatures. Computational fluid dynamics is used to simulate SOFC operation at 600 degrees C. The temperature distributions and gradients of a single cell at 0.7 V under different thermal conductivity values are analyzed and discussed to determine their relationship. Simulations reveal that the influence of thermal conductivity is more remarkable for the anode and electrolyte than for the cathode. Increasing the thermal conductivity of the anode by 50% results in a 23% drop in the maximum thermal gradients. The results for the electrolyte are subtle, with a similar to 67% reduction in thermal conductivity that only results in an 8% reduction in the maximum temperature gradient. The effect of thermal conductivity on temperature gradient is important because it can be used to predict thermal stress generation.
引用
收藏
页码:132 / 139
页数:8
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