Simulation of an interdigitated flow channel assembled in a proton exchange membrane Fuel Cell (PEMFC)

Valentín-Reyes, Jonathan; León, María I.; Pérez, Tzayam; Romero-Castañón, T.; Beltrán, José; Flores-Hernández, José Roberto; Nava, José L.

doi:10.1016/j.ijheatmasstransfer.2022.123026

Cited by 23 publications

(2 citation statements)

References 26 publications

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“…After parameter setting, the steady-state solver is used to couple the three physical fields for calculation. The first-order linear discretization is used in the module involving fluid flow and transfer, and the Brinkman module involving the coupling part is discretized by P1 + P1, which can obtain more accurate solutions [34][35][36]. The internal situation of PEMFCs is complicated during the chemical reaction.…”

Section: Governing Equationmentioning

confidence: 99%

CFD Analysis of Spiral Flow Fields in Proton Exchange Membrane Fuel Cells

Yao¹,

Yan²,

Pei³

2023

Fluid Dynamics &Amp; Materials Processing

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Proton exchange membrane fuel cells (PEMFCs) are largely used in various applications because of their pollution-free products and high energy conversion efficiency. In order to improve the related design, in the present work a new spiral flow field with a bypass is proposed. The reaction gas enters the flow field in the central path and diffuses in two directions through the flow channel and the bypass. The bypasses are arranged incrementally. The number of bypasses and the cross-section size of the bypasses are varied parametrically while a single-cell model of the PEMFC is used. The influence of the concentration of liquid water and oxygen in the cell on the performance of different flow fields is determined by means of Computational fluid dynamics (COMSOL Multiphysics software). Results show that when the bypass number is 48 and its cross-sectional area is 0.5 mm 2 , the cell exhibits the best performances.

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Section: Governing Equationmentioning

confidence: 99%

CFD Analysis of Spiral Flow Fields in Proton Exchange Membrane Fuel Cells

Yao¹,

Yan²,

Pei³

2023

Fluid Dynamics &Amp; Materials Processing

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“…From a modeling perspective, most studies employed the outdated experimental data of traditional AEMs or assumed a fully hydrated membrane with a constant ionic conductivity. [29][30][31][32] However, data on ion transport under various hydration levels is still lacking for novel and commonly used AEMs.…”

Section: Introductionmentioning

confidence: 99%

Anion Exchange Membranes for Fuel Cells: Equilibrium Water Content and Conductivity Characterization

Wang

Chen

Han

et al. 2023

Adv Funct Materials

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The ionic conductivity of anion exchange membranes (AEMs) directly determines the performance of anion exchange membrane fuel cells (AEMFCs), which highly depends on the hydration level of the membrane. A better understanding of the relationship between hydration level and membrane ionic conductivity is essential for membrane development and for water and thermal management analyses of AEMFCs. In this study, the effects of water activity and temperature on water uptake, equilibrium water content, and ionic conductivity of three high‐performance AEMs (Alkymer, Orion, and Pention) are quantitatively characterized via the designed experiments. The results show that Orion exhibits the lowest water uptake and highest ionic conductivity among the three membranes at high water activity and Alkymer exhibits good water‐retention capability and the highest ionic conductivity at low water activity. Empirical equations combining water activity and equilibrium water content are proposed based on fitted experimental data to define the hydration level. Empirical equations combining ionic conductivity, equilibrium water content, and temperature are fitted to illustrate the relationship between ionic conductivity and hydration level. The findings of this study can provide solid guidelines and support for the future experimental characterization and water and thermal management analyses of AEMFCs.

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Effect of Number of Channels on Performance of PEM Fuel Cells for Serpentine Type Channel Configuration

Işıklı,

Sürmen

2024

Arab J Sci Eng

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The number of gas flow channels in a serpentine-type channel configuration for Polymer Electrolyte Membrane Fuel Cells (PEMFC) is a critical design parameter. It influences mass transport, pressure drop, and water management, all of which contribute to the overall performance and efficiency of the fuel cell. In this study, different channel number configurations for small active area fuel cell and their role in contributing to a more sustainable energy environment are discussed. The influence of the number of multiple channels on the operational performance was examined in a fuel cell with 25 cm2 of active area. Six different flow channel configurations belonging to the traditional serpentine-designed flow channel were utilized, with multiple inlet–outlet structures. Numerical calculations for pressure, velocity, distribution of reactants (oxygen and hydrogen), membrane water content, and changes in water saturation concentration were conducted using the ANSYS Fluent program. The highest power density of 0.657 W/cm2 was achieved in the single-channel design, resulting in a 14% performance increase compared to the eight-channel design, which exhibited the lowest performance. However, the highest pumping loss due to pressure drop was observed in the serpentine one-channel design at 0.016573 W/cm2. While the pressure drop enhances performance in the same channel design, when constructing a fuel cell stack with a large number of cells, significant difficulties may arise in procuring a compressor capable of providing the desired pressure and flow rate. Therefore, alternative designs with reduced pressure drop need to be considered.

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Simulation of an interdigitated flow channel assembled in a proton exchange membrane Fuel Cell (PEMFC)

Cited by 23 publications

References 26 publications

CFD Analysis of Spiral Flow Fields in Proton Exchange Membrane Fuel Cells

CFD Analysis of Spiral Flow Fields in Proton Exchange Membrane Fuel Cells

Anion Exchange Membranes for Fuel Cells: Equilibrium Water Content and Conductivity Characterization

Effect of Number of Channels on Performance of PEM Fuel Cells for Serpentine Type Channel Configuration

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