G101 平板型SOFCのスタック内温度分布に起因する不均一流量分配(OS5 水素・燃料電池)

概要

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A numerical model for an anode-supported direct-internal-reforming planar solid oxide fuel cell (SOFC) short stack was developed. In this model, the volume-averaging method is applied to the flow passages in the SOFC by assuming that a porous material is inserted in the passages as a current collector. This treatment reduces the computational time and cost by avoiding a full three-dimensional simulation while maintaining the ability to solve the flow and pressure fields in the streamwise and spanwise directions. In this model, quasi-three-dimensional multicomponent gas flow fields, the temperature field, and the electric potential/current fields were simultaneously solved. The steam-reforming reaction using methane, the water-gas shift reaction, and the electrochemical reactions of hydrogen were taken into account. It was found that heat loss from the top face of stack can cause significant non-uniformity in the inlet flow rate and fuel utilization which may cause the stack degradation.
一般社団法人日本機械学会の論文
2011-06-22