TY - JOUR
T1 - Effect of bi-layer interconnector design on mass transfer performance in porous anode of solid oxide fuel cells
AU - Chen, Qiuyang
AU - Wang, Qiuwang
AU - Zhang, Jian
AU - Yuan, Jinliang
PY - 2011/4
Y1 - 2011/4
N2 - We propose a novel interconnector design, termed bi-layer interconnector, for solid oxide fuel cells (SOFCs). It can disturb the fuel gas and air on the planes normal to the SOFC three-phase-boundary (TPB) layer. In this paper, a two-dimensional half-cell model is developed to study the concentration overpotentials in the fuel side of the SOFC stack with conventional and novel bi-layer interconnectors. The numerical results show that the novel bi-layer interconnector can increase the velocity of the fuel gas in the porous anode. The results of mole fraction distribution illustrate that the novel bi-layer interconnector can effectively disturb the fuel flow. The average H2 mole fraction in the porous anode of SOFC with bi-layer interconnector is about 4.7% higher than that of conventional SOFC. The average H2 mole fraction at TPB interface is about 9.2% higher. The concentration overpotential of the novel SOFC design is lower than that of the conventional SOFC design by 5%. It can enhance the mass transfer in porous electrode and improve the performance of SOFC.
AB - We propose a novel interconnector design, termed bi-layer interconnector, for solid oxide fuel cells (SOFCs). It can disturb the fuel gas and air on the planes normal to the SOFC three-phase-boundary (TPB) layer. In this paper, a two-dimensional half-cell model is developed to study the concentration overpotentials in the fuel side of the SOFC stack with conventional and novel bi-layer interconnectors. The numerical results show that the novel bi-layer interconnector can increase the velocity of the fuel gas in the porous anode. The results of mole fraction distribution illustrate that the novel bi-layer interconnector can effectively disturb the fuel flow. The average H2 mole fraction in the porous anode of SOFC with bi-layer interconnector is about 4.7% higher than that of conventional SOFC. The average H2 mole fraction at TPB interface is about 9.2% higher. The concentration overpotential of the novel SOFC design is lower than that of the conventional SOFC design by 5%. It can enhance the mass transfer in porous electrode and improve the performance of SOFC.
KW - Bi-layer interconnector
KW - Concentration polarization
KW - Half-cell model
KW - Mass transfer
KW - Numerical simulation
KW - Solid oxide fuel cell
UR - https://www.scopus.com/pages/publications/79952282787
U2 - 10.1016/j.ijheatmasstransfer.2011.01.003
DO - 10.1016/j.ijheatmasstransfer.2011.01.003
M3 - 文章
AN - SCOPUS:79952282787
SN - 0017-9310
VL - 54
SP - 1994
EP - 2003
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
IS - 9-10
ER -