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Sensitivity Analysis for a Planar SOFC: Size Effects of the Porous Gas Diffusion Layer Underneath the Channel Rib
Author(s) -
Zeng Y. K.,
Fan P.,
Zhang X.,
Fu C.,
Li J.,
Li G.
Publication year - 2014
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201300182
Subject(s) - anode , materials science , solid oxide fuel cell , nernst equation , planar , ohmic contact , diffusion , current (fluid) , current density , porosity , gaseous diffusion , thermal diffusivity , hydrogen , composite material , analytical chemistry (journal) , layer (electronics) , thermodynamics , chemistry , electrode , computer graphics (images) , physics , quantum mechanics , chromatography , computer science , organic chemistry
This paper investigates the size effects of the gas diffusion layer underneath the channel rib on the performance of a planar solid oxide fuel cell (SOFC). Based on 3‐dimensional numerical simulations, the sensitivities of the electrical performance parameters (Nernst potential and current density) and the thermal performance parameters (heat generation and temperature) are examined as a function of variations in the channel rib width and anode thickness. The sensitivity values of the Nernst potential and current density are calculated to guide the design of a cell in a planar SOFC. In particular, the changes in ohmic losses for the interconnectors and anode are analyzed as a function of the variations of the channel rib width and anode thickness. The variations of the mole fractions of hydrogen, oxygen, and water in the active areas of the channel rib and the channel are presented, which provide sensitivity profiles for gas diffusion with respect to changes in the anode thickness.