全钒液流电池电解液分布的数值模拟.pdf

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全钒液流电池电解液分布的数值模拟
徐波,齐亮,姚克俭,谢晓峰2
(浙江工业大学化学工程与材料学院,録色化学合成技术国家重点实验室培育基地,浙江杭州310032
2清华大学核能与新能源技术研究院,北京100084)
摘要:为了提高全钒液流电池双极板流道电解液分布均匀性,考察流体流动行为,本文基于计算流体力学,
在传统平直并联流道基础上通过增加倾斜挡板和入口流堰,改进流道结构;同时探究钒电池用电解液在分段式
多通道蛇形流道内流体水力学特征。数值模拟结果表明:分段式多通道蛇形流道朊可以保持传统蛇形流道流体
均匀分配的性能,文能有效降低沆阻,减少泵耗;合适的电解液流速及其均匀分布可以优化电解液活性物质浓
度分布,提高电解液穂定性,増大电池能量效率
关鍵词:全钒液流电池;电解液;流道结构;计算流体力学;数值模拟
中图分类号:TM911
文献标志码:A文章编号:1000-6613(2013)02-0313-07
DOI;10.3969/is.10006613.2013.02.012
Investigation and simulation on electrolyte distribution for all-vanadium
redox flow battery
XU Bo, OI Liang, YAO Kejian, XIE Xiaofeng
State Key Laboratory Breeding Base of Green Chemistry-synthesis Technology, Zhejiang University of Technology
langzhou 310032, Zhejiang, China; Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing
100084, China)
Abstract: Based on computational fluid dynamics(CFD), a traditional straight parallel flow channel
was equipped with a sloping baffle and a flow weir to improve the uniformity of electrolyte distribution
and to investigate the fluid flow behavior for all-vanadium reodx flow battery. The hydrodynamics
characteristics of vanadium electrolyte in sectional form multi-channel of serpentine flow channel was
discussed. The numerical simulation results showed that the sectional form multi-channel of serpentine
flow channel can not only keep the good uniformity of electrolyte distribution, but also be able to
reduce flowing resistance and pump consumption. In addition, it can optimize the distribution of
electrolyte concentration and improve the battery efficiency by choosing the appropriate flow rate of
electrolyte and more uniformity of electrolyte distribution
Key words: all-vanadium redox flow battery; electrolyte; flow channel structure; CFD; numerical
simulation
全钒液流电池( vanadium redox flow battery,电、大规模光电转换、不间断电源和军用应急电源
VRFB)以其电池效率高、结构相对简单、使用寿系统等领域,近些年来受到广泛关注和研究引。
命长、可深度充放电、单位能量成本低和易于维护
前人研究发现,电解液浓度和副反应产生气泡
等优点,被公认为是最具开发潜力的适用于大规模
储能蓄电的二次绿色化学电池。其广泛应用于电网收稿日:2028:修改稿日期:20208165
第一作者:徐波(1987ー),男,硕士研究生。联系人:姚克俭,教授,
调峰、平衡负荷、太阳能发电站和风能发电站的蓄
主要从事流动与传质过程研究。E-mailyaokj@zjut.edu.cno