摘要
利用仿真软件进行了建模计算,采用Darcy定律分析流场,对全钒氧化还原液流电池(钒电池)的流场特性、流场内钒离子的浓度分布以及恒流充放电时电池的温度变化进行了模拟研究,结果表明:电池进液口的位置及进液速度对流场的压力及其分布均匀性有较大影响,钒离子会在膜两侧发生富集,其浓度分布与电解液的流量直接相关。电池负极温升明显大于正极,在理想情况下,持续运行10个循环后温度会上升2 K左右。
The three-dimension non-isothermal model was presented through the simulation software.According to Darcy law,the characteristics of flow field for vanadium redox flow battery（VRB）,and the concentration distribution of V4＋,and the temperature changes during the charge-discharge process,were analyzed by the established model.The results indicate that the position and flux of battery inlet shows a great influence on flow-field uniformity.The vanadium concentration will concentrate close to the membrane and the flux of electrolyte shows a deep influence on concentration distribution of V4＋.During the charge-discharge process,the temperature of negative part shows a quicker increase than that of positive part for VRB.After ten cycles,the temperature will climb up by about 2 K during continual charge-discharge.
出处
《电源技术》
CAS
CSCD
北大核心
2012年第2期201-203,261,共4页
Chinese Journal of Power Sources
基金
国家重点基础研究发展计划"973"项目(2010CB-227203)
国家自然科学基金项目(21003141)
关键词
钒电池
三维非恒温模型
流场
浓度分布
vanadium redox flow battery
three-dimension non-isothermal model
flow field
concentration distribution
