CFD Numerical Study of a New Crossed Inverse Z Flow Field for PEMFC

Yan, Fayi

doi:10.20964/2022.07.12

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…(1) Due to the low Reynolds number, the flow state of a fuel cell is laminar flow and the flow process is stable [36].…”

Section: Model Assumptionsmentioning

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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“…(1) Due to the low Reynolds number, the flow state of a fuel cell is laminar flow and the flow process is stable [36].…”

Section: Model Assumptionsmentioning

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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“…Meanwhile, gas diffusion, water transfer, and the electrochemical reaction of the catalytic layer occur. They interact with and influence each other [37]. The governing equation used in this paper is as follows:…”

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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“…[ 194 ] Besides, the Pt‐Ni composite catalysts achieved a 22% higher power output than commercial Pt/C. [ 195 ]…”

Section: Development Of Cathode Materialsmentioning

confidence: 99%

Recent Advances on the Development of Functional Materials in Microbial Fuel Cells: From Fundamentals to Challenges and Outlooks

Zhu

Bingchuan

et al. 2021

Energy & Environ Materials

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Microbial fuel cells (MFCs), as a sustainable and promising technology to solve both environmental pollution and energy shortage, have captured tremendous attention. The conversion efficiency of chemical energy contained in organic waste or wastewater to electricity via microbial metabolism strongly depends on the performance of each functional unit, including the anode, cathode and separator/membrane used in MFCs. Therefore, significant attention has been paid toward developing advanced functional materials to enhance the performance of each unit or provide new featured functions. This review paper provides a comprehensive review on recent achievements and advances in the modification and development of functional materials for MFC systems, including 1) the development of functional anode materials for enhanced microbial compatibilities as well as electron transfer capabilities, 2) the development of cost‐effective separators/membranes such as ion exchange membrane, porous membrane, polymer electrolyte membrane and composite membrane, and 3) the development of functional cathode catalysts to decrease the over‐potential and enhance the electrocatalytic efficiency for oxygen reduction reaction in order to substitute the common costly Pt catalyst. The challenges and outlooks of functional materials for MFC applications are also discussed.

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CFD Numerical Study of a New Crossed Inverse Z Flow Field for PEMFC

Cited by 9 publications

References 32 publications

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

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

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

Recent Advances on the Development of Functional Materials in Microbial Fuel Cells: From Fundamentals to Challenges and Outlooks

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