Journal Article

PreJuSER-60616

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Reconstruction of Electric Currents in a Fuel Cell by Magnetic Field Measurements

Lustfeld, H.FZJ* ; Reißel, M. ; Schmidt, U. ; Steffen, B.FZJ*

2009
ASME New York, NY

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Please use a persistent id in citations: doi:10.1115/1.2972171

Abstract: In this paper the tomographic problem arising in the diagnostics of a fuel cell is discussed. This is concerned with how well the electric current density j(r) be reconstructed by measuring its external magnetic field. We show that (i) exploiting the fact that the current density has to comply with Maxwell's equations it can, in fact, be reconstructed at least up to a certain resolution, (ii) the functional connection between the resolution of the current density and the relative precision of the measurement devices can be obtained, and (iii) a procedure can be applied to determine the optimum measuring positions, essentially decreasing the number of measuring points and thus the time scale of measurable dynamical perturbations-without a loss of fine resolution. We present explicit results for (i)-(iii) by applying our formulas to a realistic case of an experimental direct methanol fuel cell.

Keyword(s): J ; current density (auto) ; direct methanol fuel cells (auto) ; magnetic field measurement (auto) ; Maxwell equations (auto) ; tomography (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Jülich Supercomputing Centre (JSC)
2. Quanten-Theorie der Materialien (IFF-1)

Research Program(s):

1. Scientific Computing (P41)
2. Kondensierte Materie (P54)

Appears in the scientific report 2009

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