By Zhongjie He, Hua Li, Karl Erik Birgersson
This booklet specializes in novel decreased telephone and stack types for proton trade membrane gasoline cells (PEMFCs) and planar good oxide gas cells (P-SOFCs) that serve to lessen the computational fee through orders of significance or extra with wanted numerical accuracy, whereas taking pictures either the typical houses and the variety of the based variables within the 3D opposite numbers. the knowledge supplied is additionally utilized to different kinds of plate-type gasoline cells whose move fields include parallel undeniable channels separated by means of sturdy ribs.
those speedy and effective types permit statistical sensitivity research for a pattern dimension within the order of a thousand with no prohibitive computational rate to be played to enquire not just the person, but in addition the simultaneous results of a gaggle of various geometrical, fabric, and operational parameters. this gives very important details for cell/stack layout, and to demonstrate this, Monte Carlo simulation of the decreased P-SOFC version is carried out at either the single-cell and stack levels.
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Additional resources for Reduced Modelling of Planar Fuel Cells: Spatial Smoothing and Asymptotic Reduction
6. Investigation of the influence of perturbations between cells on the performance of the reduced non-isothermal stack models. For stack modelling, the influences of perturbations or non-uniformities between cells on the reduced stack models are investigated and illustrated with distributions of current density, temperature, and molar concentrations or mass fractions of reactants. Furthermore, the degree of the coupling between the local current densities of adjacent cells is quantiﬁed with a dimensionless number that is derived through an analysis of the conservation of charge in a bipolar plate between cells.
3. During operation, oxygen diffuses from the air flow channel into the porous cathode through pores and moves towards to the cathode/electrolyte interface. It is subsequently ionized by combining with electrons in the electrochemical reaction sites called the triple phase boundaries (TPB) near the electrode/electrolyte interface. Then, the oxide ions are driven by the chemical potential difference between the two sides of the electrolyte to cross the electrolyte. The half-cell reaction for the reduction of O2 at the cathode is 1 O2 ðgÞ þ 2eÀ ¼ O2À : 2 ð1:4Þ After reaching the anode TPB, the oxygen ions react with the hydrogen (H2) that diffuses from the fuel flow channel to produce gaseous water (H2O) and free electrons (e−).
Achenbach E, Riensche E (1994) Methane/steam reforming kinetics for solid oxide fuel cells. J Power Sources 52(2):283–288 63. Cocco D, Tola V (2007) Comparative performance analysis of internal and external reforming of methanol in SOFC-MGT hybrid power plants. J Eng Gas Turbines Power Trans ASME 129(2):478–487 64. Nikooyeh K, Jeje AA, Hill JM (2007) 3D modeling of anode-supported planar SOFC with internal reforming of methane. J Power Sources 171(2):601–609 65. Paradis H, Anderssson M, Yuan J, Sunden B (2011) CFD modeling: different kinetic approaches for internal reforming reactions in an anode-supported SOFC.