Effect of air flow rate distribution and flowing direction on the thermal stress of a solid oxide fuel cell stack with cross-flow configuration

2021 ◽  
Author(s):  
Ping Yuan ◽  
Syu-Fang Liu
Keyword(s):  
Thermal Stress ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Flow Rate ◽  
Cross Flow ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Air Flow Rate ◽  
Flow Configuration ◽  
Fuel Cell Stack

Electrical and Thermal Performance of a Solid Oxide Fuel Cell Unit With Nonuniform Inlet Flow and High Fuel Utilization

2011 ◽  
Vol 8 (3) ◽  
Author(s):  
Syu-Fang Liu ◽  
Mu-Sheng Chiang ◽  
Shih-Bin Wang ◽  
Ping Yuan
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Flow Rate ◽  
Solid Oxide ◽  
Electrical Performance ◽  
Oxide Fuel ◽  
Fuel Utilization ◽  
Air Flow Rate ◽  
Average Current Density ◽  
Average Current

This study investigates the electrical performance of a planar solid oxide fuel cell unit with cross-flow configuration when the fuel utilization gets higher and the fuel inlet flows are nonuniform. A numerical code, solving the two-dimensional, simultaneous, partial differential equations of mass, energy, and electrochemistry and neglecting the stack direction variation effect, is developed. The results show that the fuel utilization increases with a decrease in the molar flow rate, and the average current density decreases when the molar flow rate drops. In addition, nonuniform pattern A induces more severe happening of nonreaction area in the corner of the fuel exit and the air inlet. This nonreaction area deteriorates the average current density and then reduces the electrical performance to 7%. This study suggests that the fuel inlet manifold should be located far from the inlet of air, which is able to decrease the deterioration to below 3% when using nonuniform profile of pattern B. On the other hand, employing a suitable air flow rate, we can easily control the operating temperature of a solid oxide fuel cell unit and the effect of nonuniform inlet air flow rate on the temperature distribution becomes negligible.

Three-Dimensional Simulation of Planar Solid Oxide Fuel Cell Stack

2008 ◽  
Vol 128 (2) ◽  
pp. 459-466 ◽  
Author(s):  
Yoshitaka Inui ◽  
Tadashi Tanaka ◽  
Tomoyoshi Kanno
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Stack ◽  
Dimensional Simulation
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