Numerical investigation of the effect of blocked gas flow field on PEM fuel cell performance

Ozdemira, S. N.; Taymaz, İmdat

doi:10.1007/s13762-020-03075-3

Cited by 13 publications

(3 citation statements)

References 32 publications

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“…CL in anode: S s −j a S m j a CL in cathode: S s j c S m −j c In other regions, S = 0, where the subscripts "a" and "c" are the anode and cathode. j is the exchange current density, which can be obtained from the Butler-Volmer equation (Ozdemira and Taymaz, 2021):…”

Section: Mathematical Modelmentioning

confidence: 99%

Numerical Investigation on the Performance of Proton Exchange Membrane Fuel Cell With Zigzag Flow Channels

Zhang

Liu

et al. 2022

Front. Therm. Eng.

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Reasonable flow channel designs play a significant role in improving the performance of proton exchange membrane fuel cells (PEMFC). The effect of the zigzag flow channels with three different numbers of turns on the performance of PEMFC was investigated in this paper. The polarization curves, molar concentration of oxygen and water, and power density were analyzed, and the numerical results showed that the overall performance of the zigzag flow channels was significantly better than that of the conventional parallel flow channel. With the increase of the number of turns from 3 to 9, the performance of PEMFC was gradually improved, the diffusion capacity of oxygen to the interface of the electrochemical reaction was also promoted, and the low oxygen concentration regions were gradually reduced. When the number of turns was 9, the current density of PEMFC was 8.85% higher than that of the conventional parallel channel at the operating voltage of 0.4 V, and the oxygen non-uniformity at the between gas diffusion layer (GDL) and catalyst layer (CL) interface was the minimum with a value of 0.51. In addition, the molar concentration of water in the channel also decreased. Due to the relatively large resistance of the zigzag flow channels, the maximum pressure drop of the zigzag flow channel was 263.5 Pa, which was also conducive to the improvement of the drainage effect of the conventional parallel flow channel. With the increase of the number of turns in the zigzag channel, the pressure drop and parasitic power density gradually increased. The 9-zigzag flow channel obtained the maximum pressure drop and net power density, which were 263.5 Pa and 2995.6 W/m2, respectively.

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Section: Mathematical Modelmentioning

confidence: 99%

Numerical Investigation on the Performance of Proton Exchange Membrane Fuel Cell With Zigzag Flow Channels

Zhang

Liu

et al. 2022

Front. Therm. Eng.

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“…In addition, adding blockages to the channel has now become a common means of changing its cross-sectional area. Chen et al [17] set up an incremental step-like obstruction along the channel. The performance show that this operation can effectively enhance the low reaction efficiency caused by insufficient oxygen supply in the second half of the flow field.…”

Section: Introductionmentioning

confidence: 99%

Research and Optimization of Four Serpentine-Wave Flow Fields in PEMFC

Yan,

Lu,

Yao

et al. 2024

J. Electrochem. Sci. Technol

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The layout of the cathode flow field largely determines the net output power of the proton exchange membrane fuel cell (PEMFC). To make the normal mass transfer effect best, the longitudinal channel was waved based on four serpentine flow channels, and the effects of sag depth and longitudinal channel width on the output efficiency of the cell were explored. The results show that the wave channel design systematically enhances the forced convection between adjacent channels, which can prevent a large zone of oxygen starvation zone at the outlet of the channel. The increase of the normal velocity in the gas transmission process will inevitably induce a significant enhancement of the mass transfer effect and obtain a higher current density in the reaction zone. For the longitudinal channel width, it is found that increasing its size in the effective range can greatly reduce the channel pressure drop without reducing the output power, thereby improving the overall efficiency. When the sag depth and longitudinal channel width gradient are 0.6 mm and 0.2 mm respectively, PEMFC can obtain the best comprehensive performance.

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“…There are lots of experimental and numerical studies on flow field design in the literature. Many studies focus on the improvement of reactant transport [5][6][7], crosssectional geometry and dimensions of the channel [8,9], the number and geometry of the blockages located in the flow channel [10][11][12]. In recent years, there have been many studies based on flow field design.…”

Section: Introductionmentioning

confidence: 99%

CFD Investigation of Different Flow Field Designs for Efficient PEMFC Performance

Özdemir

Taymaz

2021

Sakarya University Journal of Science

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Proton exchange membrane (PEM) fuel cell performance depends substantially on the geometry, configuration of the flow channels, and size. A right gas flow field pattern requires a homogeneous reactant distribution, low-pressure drop, and good water management. This paper outlines a numerical study, investigated the influence of the U-type, Z-type, and serpentine flow field configuration on the steady-state cell performance using the CFD technique ANSYS FLUENT PEMFC module. The main goal of this study focuses on a novel perspective for enhancing the design of the PEMFC resulting in better performance. The results indicate that the PEMFC with serpentine flow field configuration yields a significantly higher power density compared to the other designs.

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Numerical investigation of the effect of blocked gas flow field on PEM fuel cell performance

Cited by 13 publications

References 32 publications

Numerical Investigation on the Performance of Proton Exchange Membrane Fuel Cell With Zigzag Flow Channels

Numerical Investigation on the Performance of Proton Exchange Membrane Fuel Cell With Zigzag Flow Channels

Research and Optimization of Four Serpentine-Wave Flow Fields in PEMFC

CFD Investigation of Different Flow Field Designs for Efficient PEMFC Performance

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