迴旋型流道與蛇型流道在質子交換膜燃料電池之三維數值模擬分析

3-D Simulation Analysis of PEM Fuel Cell with Spiral and Serpentine Gas Channels

曹凱翔(Kai-Hsiang Tsao)

指導教授 ： 林育才

元智大學/工程學院/機械工程學系/碩士(2007年)

摘要

本文對質子交換膜燃料電池（PEMFC）做三維的全電池模擬分析，利用商用數值分析模擬軟體CFDRC針對蛇型（serpentine）、迴旋型（spiral）兩種流道進行不同溫度、不同流量、濃度等不同條件狀態的模擬分析，本文中所利用之全電池模型包含了陰陽極集電板、陰陽極流道板、陰陽極擴散層、陰陽極觸媒層以及質子交換膜。分析結果顯示雙迴旋和三迴旋流道發揮了流道幾何上的優點，有效的利用了大部分的反應區域，並使濃度、濕度均勻擴散分佈。單迴旋流道由於絕大部分壓力集中於流道中央，阻礙了燃料進氣至流場中央反應，並迫使燃料往出口流道排出，造成流道中央積水及沒有燃料反應，而致使性能低下。三蛇流道雖然沒有三迴旋型流道般較好的燃料分佈，但是卻因為有較大的壓差造成良好的排水性，所以在單蛇以及雙蛇型流道平均性能要比迴旋型流道好。

關鍵字

質子交換膜燃料電池 ； 迴旋型流道 ； 蛇型流道 ； 數值模擬

並列摘要

In this research, the effects of different operating conditions with single-path, dual-path, treble-path serpentine and spiral flow fields on the cell performance are numerically analyzed. The operating conditions include the fuel flow rate, temperature of the fuel and different types of flow fields. The model studied is fully three-dimensional and includes current collectors, fuel flow-field plates, GDLs and MEA. According to the results of simulation, the dual-path and treble-path spiral flow fields have better performance because this type of flow fields has advantage in geometry which enables fuel to flow over all reaction area more uniformly. However, the performance of single-path spiral configuration is lower than other types of flow fields because in the central region the pressure is higher and the reaction-induced water blocks the fuel to flow in.

並列關鍵字

PEM Fuel Cell ； spiral channel ； serpentine channel ； numerical simulation

參考文獻

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