Numerical simulation on performance of vanadium microfluidic fuel cell

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Numerical simulation on performance of vanadium microfluidic fuel cell

更新时间：2025-12-10

- Numerical simulation on performance of vanadium microfluidic fuel cell
- CIESC Journal Issue 12, (2011)
- 作者机构：
  
  吉林大学机械科学与工程学院,吉林,长春,130025
- 作者简介：
- 基金信息：
- DOI：
  CLC： 0.3969/j.issn.0438-1157.2011.12.026
- Online First：05 December 2011，
  
  Published：05 December 2011
- 稿件说明：
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高明峰. Numerical simulation on performance of vanadium microfluidic fuel cell[J]. CIESC Journal, 2011, (12).
DOI：

高明峰. Numerical simulation on performance of vanadium microfluidic fuel cell[J]. CIESC Journal, 2011, (12). DOI：

摘要

对一种新型钒微流体燃料电池进行了理论分析并建立了三维数值模型。该模型包含了层流、物质传输与电化学反应等电池内部的物理和化学过程。计算得到的极化曲线与实验数据吻合较好，说明模型是可靠的。通过多场耦合求解，数值模拟了体积流速、燃料纯度等对电池性能的影响。研究结果表明：增大体积流速可以提高电池的功率，但燃料利用率会大幅降低；燃料纯度对燃料电池的电压有较大影响；燃料利用率低是制约微流体燃料电池发展的主要因素之一。通过改进原有Y形流道设计，设计了一种双Y形流道微流体电池，仿真结果显示其可以较大地改善燃料的利用率。

Abstract

In this study

a theoretical analysis for a novel microfluidic vanadium fuel cell was implemented

which relies on laminar flow at low Reynolds number to maintain sufficient separation of fuel and oxidant streams.A three-dimensional numerical model that accounts for laminar flow

transport process of species and electrochemical reactions in fuel cell

was developed to evaluate the effect of some important physical factors including volumetric flow rate and fuel purity.All coupled equations in the model were solved digitally together.The simulation results showed that output power and current density went up with the increase of flow rate

however

the fuel utilization went down significantly.As the volumetric flow rate increased from 1 μl·s-1 to 25 μl·s-1

the power density increased by 2.2 times and there was a 90% drop in fuel utilization.Further microfluidic fuel cell design and optimizations were guided by using the model

a double Y-shaped microchannel design is proposed.It is found that the fuel utilization can be improved significantly by using a double Y-shaped microchannel.

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