Numerical Study of the Effect of the Inlet Pressure and the Height of Gas Channel on the Distribution and Consumption of Reagents in a Fuel Cell (PEMFC)

Zeroual, M.; Bouzida, S. Belkacem; Benmoussa, H.; Bouguettaia, Hamza

doi:10.1016/j.egypro.2012.05.032

Cited by 10 publications

(8 citation statements)

References 15 publications

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“…Air fed fuel cells meet variable environmental pressure levels from 700 to 1000 mbar 1) in regular aircraft operation. The variation of the system pressure results in changes of current-voltage-characteristic (cp.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of PEMFC operation in ambient- and low-pressure environment considering the fuel cell humidification

et al. 2014

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This paper summarizes experimental results of an air fed polymer electrolyte membrane fuel cell system HyPM XR 12 (Hydrogenics Corp.) considering fuel cell temperature, stoichiometry and load requirement variations at ambient and low pressure operation. The experimental work realized at a low pressure test facility designed and assembled by the German Aerospace Center, Institute of Engineering Thermodynamics is based on an experimental design. The experimental results confirm reduced fields of fuel cell operation as well as a decreased gross stack performance and efficiency at low operating pressures (950 mbar ≥ p ≥ 600 mbar) for defined fuel cell temperature, stoichiometry and load requirement. In addition, indexes of the operating parameters are introduced characterizing the fuel cell operation with regard to the gross stack performance and efficiency at ambient and low pressure level. The discussion of the results considers analyses of fuel cell humidification.

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Section: Introductionmentioning

confidence: 99%

Characteristics of PEMFC operation in ambient- and low-pressure environment considering the fuel cell humidification

et al. 2014

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“…In Figure 6 a, the current reduced instantly and the consumption of fuel and air flow reduced briefly. However, as the fuel consumption rate of the anode is twice the air consumption rate of cathode,9 the current changed without consideration of the pressure regulation, and the change in anodic pressure would be twice that of the cathode pressure. As the current changed, the cathodic pressure changed from 108 to 112.4 kPa, a difference of 4.4 kPa, and the anodic pressure changed from 128 to 140.3 kPa, a difference of 12.3 kPa.…”

Section: Resultsmentioning

confidence: 99%

“…A method to control the anode pressure under the conditions that anode export is closed and without the use of a circulation pump has been proposed and used to test a single PEMFC 8. The influence of the pressure on the performance of a fuel cell has been analyzed by using computational fluid dynamics (CFD) simulations 9. The simulation results showed that increasing the inlet pressure improves the reactant consumption, which results in a more homogeneous distribution.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Anode and Cathode Pressure Difference Control and Effects in a Proton Exchange Membrane Fuel Cell System

Zhao

Tao

et al. 2015

Energy Tech

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In a proton exchange membrane fuel cell (PEMFC) system, controlling the pressure balance between the anode and the cathode reactants is very important, especially for transient processes involving big load changes. Unreasonable pressure following the control may lead to pressure imbalance, which may result in damage to the thin membranes inside the fuel cell stack. A pressure difference control method for maintaining the pressure difference on both sides of the membrane within a reasonable scope is proposed in this paper. This method is also applied in an actual PEMFC system for pressure‐balance control. In the experiments involving a 14.4 kW PEMFC system with 100 A current jumps, the pressure difference between the anode hydrogen and cathode air could be controlled within allowable values. The results reveal that the proposed method can be used to control the anode inlet pressure more simply and rapidly following the cathode pressure changes, which could be more effective for membrane protection.

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“…With relative humidity of 100% at both anode and cathode side will result in flooding which decreases the performance of PEMFC. Zeroual investigated the effects of inlet pressure and channel height on the distribution and consumption of reagents and found that increasing the inlet pressure will improve consumption of reagents and result in more homogeneous distribution . Ko et al.…”

Section: Introductionmentioning

confidence: 99%

Pressure Effect on the PEMFC Performance

Wei

Zhu

et al. 2019

Fuel Cells

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A three‐dimensional and two‐phase computational fluid dynamics (CFD) model for a single serpentine channel polymer electrolyte membrane fuel cell (PEMFC) based on ANSYS FLUENT fsimulation software is used to investigate the pressure effects on the PEMFC performance. The model is validated by a series of experiments and the numerical data fit well with the experiment results. The PEMFC performance is improved as the increase in back pressure. The simulation results revealed an important mechanism between pressure and humidity: a high back pressure could lead to a high relative humidity (RH) in cathode channel, which results in a high membrane water content. Based on this mechanism, the voltage increased by pressurization is divided into 2 parts: the voltage increased by reactants' partial pressure (Nernst potential) and the voltage increased by enhanced membrane water content. The comparison showed that the major benefit of pressurization is to keep adequate water in the membrane. The analysis of net power efficiency is also performed and it shows that the back pressure of 50 kPa is enough at low densities (less than 1,000 mA cm−2) and the back pressure of 100 kPa is needed at high densities (more than 1,000 mA cm−2).

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Numerical Study of the Effect of the Inlet Pressure and the Height of Gas Channel on the Distribution and Consumption of Reagents in a Fuel Cell (PEMFC)

Cited by 10 publications

References 15 publications

Characteristics of PEMFC operation in ambient- and low-pressure environment considering the fuel cell humidification

Characteristics of PEMFC operation in ambient- and low-pressure environment considering the fuel cell humidification

Experimental Study on Anode and Cathode Pressure Difference Control and Effects in a Proton Exchange Membrane Fuel Cell System

Pressure Effect on the PEMFC Performance

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