scholarly journals Mathematical Modeling of Electrolyte Flow in a Segment of Flow Channel over Porous Electrode Layered System in Vanadium Flow Battery with Flow Field Design

2017 ◽  
Vol 223 ◽  
pp. 124-134 ◽  
Author(s):  
Xinyou Ke ◽  
Joseph M. Prahl ◽  
J. Iwan D. Alexander ◽  
Robert F. Savinell
Keyword(s):  
Mathematical Modeling ◽  
Flow Field ◽  
Porous Electrode ◽  
Flow Channel ◽  
Layered System ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Flow Field Design

Numerical Simulation and Experiment on the Electrolyte Flow Distribution for All Vanadium Redox Flow Battery

2011 ◽  
Vol 236-238 ◽  
pp. 604-607 ◽  
Author(s):  
Jin Qing Chen ◽  
Bao Guo Wang ◽  
Hong Ling Lv
Keyword(s):  
Flow Field ◽  
Flow Distribution ◽  
Parallel Flow ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Flow ◽  
Cfd Method ◽  
The Impact ◽  
Vanadium Redox

The electrolyte flow states of all vanadium redox flow battery (VRB) have a direct effect on the battery performance and life. To reveal the electrolyte distribution in the battery, the computation fluid dynamics (CFD) method was used to simulate a parallel flow field. A hydraulics experiment and a battery performance experiment were carried out to confirm the simulated results. The results show that the predicted information agreed well with the experimental results. The electrolyte has a concentrated distribution in the central region of the parallel flow field and the disturbed flow and then vortex flow areas mainly appear in the inlet and outlet regions. The higher flux of electrolyte is helpful to uniform the distributions and to reduce the impact of flow irregularity on the battery performance. The battery with the flow field generates a power density of 15.9 mW∙cm-2, and the coulombic, voltage and energy efficiency is up to 90.5%, 74.0% and 67.2% at a current density of 20 mA·cm-2.

Flow field design and optimization of high power density vanadium flow batteries: A novel trapezoid flow battery

AIChE Journal ◽  
2017 ◽  
Vol 64 (2) ◽  
pp. 782-795 ◽  
Author(s):  
Meng Yue ◽  
Qiong Zheng ◽  
Feng Xing ◽  
Huamin Zhang ◽  
Xianfeng Li ◽  
...  
Keyword(s):  
Flow Field ◽  
Power Density ◽  
High Power ◽  
High Power Density ◽  
Flow Battery ◽  
Design And Optimization ◽  
Flow Batteries ◽  
Flow Field Design

Wavy Surface Cathode Gas Flow Channel Effects on Transport Processes in a Proton Exchange Membrane Fuel Cell

2017 ◽  
Vol 14 (3) ◽  
Author(s):  
Shian Li ◽  
Jinliang Yuan ◽  
Martin Andersson ◽  
Gongnan Xie ◽  
Bengt Sundén
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Mass Transport ◽  
Proton Exchange Membrane ◽  
Transport Processes ◽  
Flow Channel ◽  
Proton Exchange ◽  
Wavy Surface ◽  
Exchange Membrane ◽  
Flow Field Design

The flow field design of current collectors is a significant issue, which greatly affects the mass transport processes of reactants/products inside fuel cells. Especially for proton exchange membrane (PEM) fuel cells, an appropriate flow field design is very important due to the water balance problem. In this paper, a wavy surface is employed at the cathode flow channel to improve the oxygen mass transport process. The effects of wavy surface on transport processes are numerically investigated by using a three-dimensional anisotropic model including a water phase change model and a spherical agglomerate model. It is found that the wavy configurations enhance the oxygen transport and decrease the water saturation level. It is concluded that the predicted results and findings provide the guideline for the design and manufacture of fuel cells.

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