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000008514 084__ $$2WoS$$aEnergy & Fuels
000008514 084__ $$2WoS$$aNuclear Science & Technology
000008514 1001_ $$0P:(DE-Juel1)130713$$aHirschfeld, J.A.$$b0$$uFZJ
000008514 245__ $$aA novel scheme for precise diagnostics and effective stabilization of currents in a fuel cell stack
000008514 260__ $$aLondon [u.a.]$$bWiley-Intersience$$c2010
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000008514 520__ $$aA novel scheme for detecting inhomogeneous internal currents in a fuel cell stack is presented. In this paper the scheme is investigated for the case that the flow field plates consist of graphite. Then plates of high conductivity, e.g. aluminium between the flow field plates together with small slits in these plates have three effects: (a) Whenever a local inhomogeneity of the electric current occurs at a particular cell in the stack, this will induce a surface current close to that cell perpendicular to the averaged current. This current can be detected. (b) The plates of high conductivity completely prevent the inhomogeneities from spreading to neighbouring cells. (c) Even at the particular cell the inhomogeneity is suppressed as far as possible. Thus this scheme leads to much better diagnostic possibilities and at the same time reduces electric instabilities to an extent, where they probably become harmless. This scheme will first be explained for a simple model to clarify the idea. However, very precise three dimensional computations using realistic parameters are presented, corroborating the results of the simple model. Copyright (C) 2009 John Wiley & Sons, Ltd.
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000008514 65320 $$2Author$$adefect detection degradation
000008514 65320 $$2Author$$astack
000008514 65320 $$2Author$$aoperation stabilization
000008514 65320 $$2Author$$acurrent density distribution
000008514 65320 $$2Author$$amodelling
000008514 65320 $$2Author$$afuel cell
000008514 65320 $$2Author$$aDMFC
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000008514 7001_ $$0P:(DE-Juel1)130810$$aLustfeld, H.$$b1$$uFZJ
000008514 7001_ $$0P:(DE-HGF)0$$aReißel, M.$$b2
000008514 7001_ $$0P:(DE-Juel1)132269$$aSteffen, B.$$b3$$uFZJ
000008514 773__ $$0PERI:(DE-600)1480879-1$$a10.1002/er.1662$$gVol. 34, p. 293 - 302$$p293 - 302$$q34<293 - 302$$tInternational journal of energy research$$v34$$x0363-907X$$y2010
000008514 8567_ $$uhttp://dx.doi.org/10.1002/er.1662
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