Current Density Analysis in a Molten Carbonate Fuel Cell Unit with non-uniform Inlet Flow and High Anode Gas Utilization

高燃料使用率下非均勻入口流率對單體熔融碳酸塩燃料電池之電流密度場分析

劉旭昉(Syu-Fang Liu) ； 曲新生(Hsin-Sen Chu)

《中國機械工程學刊》 28卷5期 (2007/10) Pp. 555-562

https://doi.org/10.29979/JCSME.200710.0011

摘要

本篇論文在探討平板式融熔碳酸鹽單體燃料電池在交叉流模式及高燃料使用率下，非均勻入口流率對燃料電池電性能之影響分析。在忽略各特性在堆疊方向上之變化下，本篇利用一套裝軟體分別求解二维之質量守恆、能量守恆及電化學反應微分方程聯立式。結果顯示燃料使用率會隨著莫爾流率之增加而減少，而平均電流密度則會隨者莫爾流率之減少而減少。此外，非均勻的入口流率會在高燃料使用率之狀況下產生非反應區之出現。此非反應區會減低平均電流密度並使電性能下降4%。

並列摘要

This study investigates the electrical performance of a planar molten carbonate fuel cell unit with cross-flow configuration when both the anode gas utilization gets higher and anode gas inlet flows are non-uniform. A software package in this study solves two-dimensional, simultaneous, partial differential equations of mass, energy, and electro-chemistry, without considering stack direction variation. The results show that the anode gas utilization increases with a decrease in the molar flow rate, and the average current density decreases when the molar flow rate drops. Additionally, non-uniform inlet profile of the anode gas will induce a happening of non-reaction area. This non-reaction area deteriorates the average current density and then deteriorates the electrical performance to -4%.

並列關鍵字

Current density ； Molten Carbonate Fuel Cell ； Non-uniform ； Anode gas Utilization