以三維數值方法分析陰極流道幾何形狀對質子交換膜燃料電池性能之影響

Three-Dimension Numerical Analysis of Proton Exchange Membrane Fuel Cell with a Novel Cathode Flow Channel Shape

儲益宏(I-Hong Ch)

指導教授 ： 邱青煌

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2012年)

https://doi.org/10.6827/NFU.2012.00158

摘要

本研究是藉由有限元素分析軟體COMSOL多重物理量耦合分析軟體來建立三維質子交換膜燃料電池模型。模擬的區域包含陰極的完整流道，氣體擴散層與觸媒層。
此研究中使用連續方程式、Navier-Stokes方程來描述反應氣體以及生成物在氣體流道、氣體擴散層、觸媒層的流動情形和壓力分佈。透過Maxwell-Stefan方程來計算反應氣體擴散與對流以及反應氣體的生成和消耗情形。電位是利用電荷守恆方程求得。電化學反應則是使用Butler–Volmer方程來計算。
主要的研究目的為探討六種不同流道幾何型狀（平行流道、漸縮平行流、雙蛇、三蛇流道、八邊形流道、螺旋型流道）進行數值模型模擬，並探討極化曲線和功率曲線，與速度場分佈和電流密度分佈及氧氣質量分率與壓力分佈之影響，並分別探討各個流道的特性。

關鍵字

流道設計 ； PEMFC ； COMSOL ； 螺旋型流道 ； 陰極流道

並列摘要

The study creates a three-dimensional proton exchange membrane fuel cell model by COMSOL Multiphysics. The calculated region has contained cathode flow channel, gas diffusion layers, and catalyst layers .
This study uses the continuity equation and Brinkman equation to describe the reactant gas, production flow, the pressure distribution in the gas-diffusion layers, and catalyst layers. The Maxwell-Stefan equation is used to calculate species transport of multi-component mixture gas. The potential is described using charge conservation equation. The electrochemical reaction is calculated using Butler-Volmer equation .
The main research objective is to explore six different flow channel geometric shapes (parallel flow, shrink parallel flow, tow serpentine, three serpentine, octangle flow, spiral flow). Besides, the effect of the concentration, pressure, velocity, current density, power density on the flow fields will be studied in detail.

並列關鍵字

Channel design ； PEMFC ； COMSOL ； Spiral flow ； Cathode flow channel

參考文獻

[26]. 衣寶廉，“燃料電池-原理與應用”，五南出版社，2005.

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