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An investigation on the irreversibilities in a tabular SOFC stack through a finite-volume axial-symmetric model


Autore: F. Calise, A. Palombo, G. Restuccia, R.Vanoil

Collana: CA - 62 - Fisciano 2007

This paper presents a complete local exergy analysis of a tubular Solid Oxide Fuel Cell (SOFC) stack. The system consists of: a tubular SOFC equipped with internal reforming and anode-recirculation arrangement, a tube-in-tube counterflow pre-reformer and a catalytic burner. The components are simulated implementing very detailed finite volume axial-symmetric models, combining heat/mass transfer and chemical/electrochemical reactions effects. Such simulation models are based on the discretization of the computational domains.In particular, the SOFC tube is discretized along its longitudinal axis. Detailed models of the kinetics of the shift and reforming reactions, pressure drops, convection and radiative heat transfer and overvoltages are introduced. Such models are implemented on the basis of the work previously developed by the authors.

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