Data set on the performance of VRFB cells with serpentine flow fields _Experiemntal and CFD approach

Several life cycle experiments have been conducted on vanadium redox flow battery cells of size 400, 900 and 1500 cm2 active areas at various flow rates and current densities. Electrolyte of concentration 2M VOSO4 dissolved in 5M sulfuric acid is used for testing. Pressure drop measurements at various flow rates have also been measured with circulation of electrolyte solution through the cell. Graphite plates have been engraved with serpentine flow fields of the several flow-channel combinations given in Table 1 of the research article 2. Upon selecting the optimal channel configuration as (5,2,3) (channel width, rib width, channel depth), the same configuration has been extensively studied on three cell areas 416 cm2, 918 cm2 and 1495 cm2 for various flow rates and current densities. In order to interpret the macro performance of these studies, CFD simulations have also been carried out with measured intrusion depths and permeability of felt which gave the pressure drop, fractional split to porous felt and distribution of the electrolyte across the cell. Also, the pressure drop and the fractional split between the flow-channels and felt electrode is predicted by the parallel-path electrolyte circulation model (research article 2).

[1] Ravendra Gundlapalli, Sreenivas Jayanti, Effect of Electrolyte Convection Velocity in the Electrode on the Performance of Vanadium Redox Flow Battery Cells with Serpentine Flow Field, Journal of Energy Storage 30 (2020) 101516
[2] Ravendra Gundlapalli, Sreenivas Jayanti, Effect of channel dimensions of serpentine flow fields on the performance of a vanadium redox flow battery, Journal of Energy Storage, 23 (2019) 148–158, https://doi.org/10.1016/j.est.2019.03.014

在多种流速和电流密度条件下，对尺寸分别为400 cm2、900 cm2和1500 cm2的钒液流电池单元进行了多个生命周期实验。测试中使用的电解液为2M VOSO4溶液，溶解于5M硫酸中。通过电解液在电池中的循环流动，对多个流速下的压降进行了测量。根据研究文章2的第1表所给出的数种流道组合，在石墨板上刻蚀了螺旋形流场。在选取最优的通道配置（通道宽度、翅片宽度、通道深度）为（5,2,3）后，对416 cm2、918 cm2和1495 cm2三个电池面积进行了广泛的研究，研究内容涵盖多种流速和电流密度。为了阐释这些研究的宏观性能，还进行了CFD模拟，模拟中使用了测量的侵入深度和滤料的渗透率，这些数据提供了压降、孔隙滤料中的分数分裂以及电解液在电池中的分布情况。此外，还通过并行路径电解液循环模型（研究文章2）预测了流道与滤料电极之间的压降和分数分裂。