Semi-empirical along-the-channel model for a proton exchange membrane fuel cell

Huisseune, Henk; Willockx, Arnout; Paepe, Michel De

doi:10.1016/j.ijhydene.2008.08.013

Cited by 15 publications

(14 citation statements)

References 27 publications

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“…In this way the total pressure can be assumed constant over the entire fuel cell. The same approach is used for a PEM fuel cell in [17], which is more critical than AFC to pressure drops, because it has no liquid electrolyte.…”

Section: General Equation and Model Assumptionsmentioning

confidence: 99%

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Water management in an alkaline fuel cell

Verhaert

Verhelst

Janssen³

et al. 2011

International Journal of Hydrogen Energy

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Alkaline fuel cells are low temperature fuel cells for which stationary applications, like cogeneration in buildings, are a promising market. To guarantee a long life, water and thermal management has to be controlled in a careful way.To understand the water, alkali and thermal flows, a model for an alkaline fuel cell module is developed using a control volume approach. Special attention is given to the physical flow of hydrogen, water and air in the system and the diffusion laws are used to gain insight in the water management. The model is validated on the prediction of the electrical performance and thermal behaviour.The positive impact of temperature on fuel cell performance is shown. New in this model is the inclusion of the water management, for which an extra validation is performed. The model shows that a minimum temperature has to be reached to maintain the electrolyte concentration. Increasing temperature for better performance without reducing the electrolyte concentration is possible with humidified hot air.

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Section: General Equation and Model Assumptionsmentioning

confidence: 99%

“…• The temperature is assumed to be uniform in each control volume and all output flows have this temperature, which is similar to the approach in [11,17].…”

Section: General Equation and Model Assumptionsmentioning

confidence: 99%

Water management in an alkaline fuel cell

Verhaert

Verhelst

Janssen³

et al. 2011

International Journal of Hydrogen Energy

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“…[1] as: 7, and the error in thermodynamic potential E r can be compensated by modifying the empirical coefficients [2] . Henk et al [3] used the same way to compute the output voltage of fuel cell, and the modified empirical coefficients are ξ 1 =-0.944,ξ 2 =3.54×10 -3 ,ξ 3 =8.3×10 -5 ,ξ 4 =-1.96×10 -4 ,ξ 5 =3.30×10 -3 ,ξ 6 =-7.55×10 -6 ,ξ 7 =1.10×10 -6 .Both the simplified approach and empirical coefficients in Ref. [3] were employed to deal with the output voltage in this paper, combining Eq.…”

Section: Control Equations For Control Volumementioning

confidence: 99%

“…Henk et al [3] used the same way to compute the output voltage of fuel cell, and the modified empirical coefficients are ξ 1 =-0.944,ξ 2 =3.54×10 -3 ,ξ 3 =8.3×10 -5 ,ξ 4 =-1.96×10 -4 ,ξ 5 =3.30×10 -3 ,ξ 6 =-7.55×10 -6 ,ξ 7 =1.10×10 -6 .Both the simplified approach and empirical coefficients in Ref. [3] were employed to deal with the output voltage in this paper, combining Eq. (8), (9) and (10), the output voltage for control volume i can given by:…”

Section: Control Equations For Control Volumementioning

confidence: 99%

“…The mechanism models based on transport and electrochemical equations can apply to any kind of fuel cell, but the computation process is time-consuming and some parameters in such model are difficult to be measured. The semi-empirical model based on the combination of mechanism model and experimental data can only use for some specific fuel cells, but the calculation is convenient and the numerical results agree with experimental results well [1][2][3][4] . According to the Butler-Volmer equation, the partial pressures of reactants at active layer directly affect the activation overpotential of fuel cell.…”

Section: Introductionmentioning

confidence: 99%

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A new one dimensional steady state model for PEM fuel cell

Zhu

2010

WEVJ

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In consideration of the thermodynamic parameters of reactants changed along the channel, a new calculation method for the output voltage of PEM (proton exchange membrane) fuel cell was introduced in this paper based on the empirical equations. Then a one dimension steady state model for PEM fuel was established based on this new calculation method. Simulation studies on the distributions of the partial pressure of gases and current density along the channel were implemented with the model. The simulation results showed that, increasing the pressure of inlet gases can increase the partial pressure differences among the sections of the channel, which would deteriorate the uniformity of current density along the channel; A proper increment of the stoichiometric ratio of inlet gases can alleviate the spatial variations of the parameters of reactants, and the uniformity of current density can be improved by such alleviation. In order to validate the effectiveness of the model, the comparison between simulation results and known experimental data was conducted, which indicates that the presented model has proper accuracy.

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