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全钒液流电池斜向流道结构设计与性能分析

Structural Design and Performance Analysis of Inclined Flow-Field Structures for Vanadium Redox Flow Batteries

  • 摘要: 针对传统蛇形流道压降大、泵功高及电解液分布不均的问题,本研究设计了多种斜向流道结构。采用流动—传质—电化学耦合模型,比较不同流道的放电电压、压降和泵功。结果表明,10 mL/min下平行斜向流道和渐变肋宽型斜向流道压降分别降低43.39%和42.8%;50 mL/min下加线四分型斜向流道压降降低31.6%,泵功随之降至 4.48 mW,并保持略高的放电电压。斜向流道可降低流动损失并改善电解液输运,该研究可为降低压降流道设计提供参考。

     

    Abstract: To alleviate the high pressure drop, pumping power, and uneven electrolyte distribution of conventional serpentine flow fields, several inclined flow-field configurations were developed. A coupled flow–mass transfer–electrochemical model was employed to evaluate the discharge voltage, pressure drop, and pumping power. At an inlet flow rate of 10?mL/min, the pressure drops of the parallel inclined flow field and the gradient-rib-width inclined flow field decreased by 43.39% and 42.8%, respectively. At 50?mL/min, the lined quartered inclined flow field achieved a 31.6% reduction in pressure drop and a pumping power of 4.48?mW while sustaining a high discharge voltage. Inclined flow fields can reduce flow losses and enhance electrolyte transport, providing a guideline for low-pressure-drop flow-field design.

     

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