Scale Model Experiment of Liquid Water Transport in Gas Diffusion Layer of PEFC and Optimization of the Structure

2016 ◽  
Keyword(s):  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Model Experiment ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Scale Model ◽  
Liquid Water Transport

Scale Model Experiment of Liquid Water Transport in Gas Diffusion Layer of PEFC and Optimization of the Structure

2016 ◽  
Vol 75 (14) ◽  
pp. 219-226
Author(s):  
S. Sakaida ◽  
Y. Tabe ◽  
T. Chikahisa
Keyword(s):  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Model Experiment ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Scale Model ◽  
Liquid Water Transport

scholarly journals Scale model experiments for evaluation of liquid water transport in the gas diffusion layer of PEFCs

2018 ◽  
Vol 13 (2) ◽  
pp. JTST0025-JTST0025 ◽  
Author(s):  
Yutaka TABE ◽  
Satoshi SAKAIDA ◽  
Takemi CHIKAHISA
Keyword(s):  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Scale Model ◽  
Model Experiments ◽  
Liquid Water Transport

Hysteresis of output voltage and liquid water transport in gas diffusion layer of polymer electrolyte fuel cells

2019 ◽  
Vol 185 ◽  
pp. 169-182 ◽  
Author(s):  
Yangbin Shao ◽  
Liangfei Xu ◽  
Jianqiu Li ◽  
Zunyan Hu ◽  
Chuan Fang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Output Voltage ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Liquid Water Transport

A Low Order Control-Oriented Model of Liquid Water Transport in PEM Fuel Cell

2008 ◽  
Author(s):  
Angelo Esposito ◽  
Cesare Pianese ◽  
Yann G. Guezennec
Keyword(s):  
Fuel Cell ◽  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Gas Diffusion Layer ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Computational Time ◽  
Liquid Water Transport

In this work, an accurate and computationally fast model for liquid water transport within a proton exchange membrane fuel cell (PEMFC) electrode is developed by lumping the space-dependence of the relevant variables. Capillarity is considered as the main transport mechanism within the gas diffusion layer (GDL). The novelty of the model lies in the simulation of the water transport at the interface between gas diffusion layer and gas flow channel (GFC). This is achieved with a phenomenological description of the process that allows its simulation with relative simplicity. Moreover, a detailed two-dimensional visualization of such interface is achieved via geometric simulation of water droplets formation, growth, coalescence and detachment on the surface of the GDL. The accomplishment of reduced computational time and good accuracy makes the model suitable for control strategy implementation to ensure PEM fuel cells operation within optimal electrode water content. Furthermore, the model is useful for optimization analysis oriented to both PEMFC design and balance of plant.

Study on wettability effect in water transport in gas diffusion layer of PEFC by scale model experiment and LBM simulation

2018 ◽  
Vol 2018.56 (0) ◽  
pp. 114
Author(s):  
Enes Muhammet CAN ◽  
Yutaka TABE ◽  
Takemi CHIKAHISA ◽  
Satoshi SAKAİDA
Keyword(s):  
Water Transport ◽  
Diffusion Layer ◽  
Model Experiment ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Scale Model

Study on wettability effect in water transport in gas diffusion layer of PEFC by scale model experiment and LBM simulation

2018 ◽  
Vol 2018.9 (0) ◽  
pp. 31am3PN85
Author(s):  
Enes Muhammet CAN ◽  
Yutaka TABE ◽  
Takemi CHIKAHISA ◽  
Satoshi SAKAİDA
Keyword(s):  
Water Transport ◽  
Diffusion Layer ◽  
Model Experiment ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Scale Model

Effect of porosity gradient in cathode gas diffusion layer of polymer electrolyte membrane fuel cells on the liquid water transport using lattice Boltzmann method

2020 ◽  
pp. 095765092093431
Author(s):  
Mohammad Habiballahi ◽  
Hasan Hassanzadeh ◽  
Mohammad Rahnama ◽  
Seyed Ali Mirbozorgi ◽  
Ebrahim Jahanshahi Javaran
Keyword(s):  
Porous Media ◽  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Water Saturation ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Electrolyte Membrane ◽  
Liquid Water Transport

In this paper, a two-dimensional model has been developed to simulate the liquid water transport in a cathode gas diffusion layer with different porosity gradients in polymer electrolyte membrane fuel cells (PEMFCs). Due to the complexity of porous media, the simulation was carried out by lattice Boltzmann method. According to dimensionless numbers that characterize liquid water transport in porous media, simulation conditions were similar to the liquid water transfer into the gas diffusion layer of PEMFC. Different gas diffusion layers were created randomly by solid circular particles with an average diameter of [Formula: see text] and the numerical code was validated by conducting several tests. The results indicated that capillary force is the main factor in liquid water transport in the gas diffusion layer, while viscous and gravitational forces do not have a significant effect. In addition to improve the water management, the gas diffusion layer should have a positive porosity gradient, i.e. the porosity increases along the thickness. Also, under the same boundary conditions and at the average porosity (0.659), the saturation distribution curves in three porous media were compared including the gas diffusion layer with porosity gradient, the gas diffusion layer with the micro-porous layer, and the gas diffusion layer with uniform porosity. The average liquid water saturation in the gas diffusion layer with the 10% porosity gradient was 20.2% lower than in the gas diffusion layer with uniform porosity and 10.5% lower than the gas diffusion layer + micro-porous layer. Furthermore, upon elevation of the porosity gradient in the gas diffusion layer, the average liquid water saturation in the gas diffusion layer decreased. Specifically, as the porosity gradient rose from 10% to 14% and 18.5%, the average liquid water saturation values decreased to 29.8% and 38.8%, respectively compared with the gas diffusion layer with uniform porosity.

Modeling of Durability Effect on the Flooding Behavior in the PEFC Gas Diffusion Layer

2010 ◽  
Author(s):  
Partha P. Mukherjee ◽  
Rangachary Mukundan ◽  
Rodney L. Borup
Keyword(s):  
Water Transport ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Critical Role ◽  
Gas Diffusion Layer ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell ◽  
Limiting Current ◽  
Modeling Framework ◽  
Liquid Water Transport

The gas diffusion layer (GDL) plays a critical role in the overall performance of a polymer electrolyte fuel cell (PEFC), especially in the mass transport control regime due to suboptimal liquid water transport. Liquid water blocks the porous pathways in the catalyst layer and gas diffusion layer thereby causing hindered oxygen transport from the channel to the active reaction sites. This phenomenon is known as “flooding” and is perceived as the primary mechanism leading to the limiting current behavior in the cell performance. The pore morphology and wetting characteristics of the cathode GDL are of paramount importance in the effective PEFC water management. Typical beginning-of-life GDLs exhibit hydrophobic characteristics, which facilities liquid water transport and hence reduces flooding. Experimental data, however, suggest that the GDL loses hydrophobicity over prolonged PEFC operation and becomes prone to enhanced flooding. In this work, we present a pore-scale modeling framework to study the structure-wettability-durability interplay in the context of flooding behavior in the PEFC GDL.

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