Environmental benefits of transport and stationary fuel cells

Hart, David M.; Hörmandinger, G.

doi:10.1016/s0378-7753(97)02730-4

Cited by 28 publications

(8 citation statements)

References 3 publications

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“…High efficiency and low emissions of fuel cells are major advantages. Fuel cells are promising and alternative power generation technologies for obtaining sustainable and clean energy production (Hart and Hormandinger, 1998;Dincer, *Correspondence to: Ali Volkan Akkaya, Department of Mechanical Engineering, Yildiz Technical University, 34349 Istanbul, Turkey. y E-mail: aakkaya@yildiz.edu.tr 2002).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical model for performance analysis of a tubular SOFC

Akkaya

2006

Int. J. Energy Res.

198

109

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SUMMARYTubular solid oxide fuel cells (SOFC) are promising candidates for future energy conversion systems and expected to be applied widely for small-scale distributed generation to large-scale central station power plants because of their high electrical efficiency and high temperature exhaust gas utilization. This study presents an electrochemical model to determine the performance characteristics of tubular solid oxide fuel cell. Activation, ohmic and concentration polarizations are regarded as the major sources of irreversibility. The Butler-Volmer equation, Fick's law and Ohm's law are used to determine the polarization terms. Performance curves are simulated for single cell voltage and power under variable current density and validated with published experimental data for given operating conditions. All the variations of tubular SOFC's operational conditions such as operating pressure and temperature in the electrochemical processes is taken into consideration. The contribution of each polarization term to voltage losses is analysed with local characteristics such as pore size, electrolyte thickness and activation energy for evaluating the relative changes. Cell performance represented by cell voltage, power, efficiency and heat generation are analysed at its complete operating range, aiming at finding the set of optimal operating conditions maximizing the overall cell performance. As a conclusion from this study, the developed model is a simple and effective tool to analyse tubular SOFC in obtaining insight information about cell performance characteristics under different conditions.

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Section: Introductionmentioning

confidence: 99%

Electrochemical model for performance analysis of a tubular SOFC

Akkaya

2006

Int. J. Energy Res.

198

109

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“…Fuel cell not only can be used as stationary backup power for distributed power generation, but also used for portable application, from hand-held device to transportation. Among all kinds of fuel cells, Proton Exchange Membrane Fuel Cell (PEMFC) is regarded as the most suitable mobile power for vehicles due to its low working temperature, quick response, high energy density and zero pollution [2]. PEMFC can be directly supplied hydrogen by stored tanks or indirectly produced by reforming hydrocarbon fuels inside microchannel reactors.…”

Section: Introductionmentioning

confidence: 99%

Effect of microchannel structure on the reaction performance of methanol steam reforming

et al. 2015

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“…Fuel cells are expected to become of common use in stationary power generation and transportation systems (Hart and Hormandinger, 1998;Sattler, 2000;Cacciola et al, 2001;Williams et al, 2005). Solid oxide fuel cells (SOFC) are particularly attractive for aircraft applications especially for auxiliary power units systems (APUS) (Steffen et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Constructal flow structure for a single SOFC

Ordóñez¹,

Chen²,

Vargas³

et al. 2007

Int. J. Energy Res.

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SUMMARYThis paper presents a model and a structured procedure to optimize the internal structure of a single solid oxide fuel cell (SOFC) so that the power density is maximized. The polarization curve and power density are obtained as functions of temperature, geometry and operating parameters. The internal structure, which accounts for the thickness of the two electrodes and the electrolyte, and the flow channels geometry, has been optimized. The model is developed using a control volume approach, in which, all relevant thermal and electrochemical interactions between adjacent elements are accounted for. The effects of geometry on the compartments temperatures and reactants concentrations in the fuel cell are explored. The optimized internal structure results from optimal balances between the thickness of anode and cathode, L 3 and L 5 , shoulder channel aspect ratio, L t /L ch , and the total number of fuel and oxidant channels, n ch . The optima found are sharp and, therefore, important to be identified in actual SOFC design. The variations of power density in the studied ranges of L 3 and L 5 , L t /L ch , and n ch were of 11, 5 and 5%, respectively, in the three-way optimization process, for the anode-supported single SOFC.

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Environmental benefits of transport and stationary fuel cells

Cited by 28 publications

References 3 publications

Electrochemical model for performance analysis of a tubular SOFC

Electrochemical model for performance analysis of a tubular SOFC

Effect of microchannel structure on the reaction performance of methanol steam reforming

Constructal flow structure for a single SOFC

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