甲醇燃料電池放電效能之研究

Research to Discharge Electrical Efficiency of Methanol Fuel Cell

張國平(Kuo-Ping Chang) ； 張育傑(Yu-Jie Chang) ； 陳俊佑(Chun-You Chen) ； 林明謙(Ming-Cheng Lin)

《技術學刊》 24卷1期 (2009/03) Pp. 53-57

https://doi.org/10.29507/JT.200903.0005

摘要

本文針對直接甲醇燃料電池模組進行放電效能之測試，包括甲醇燃料溫度變化，甲醇燃料入口壓力變化與長時間放電功率穩定性之實驗分析。希望藉此實驗之分析結果，了解甲醇燃料電池在不同的燃料溫度操作下，是否影響其放電輸出之效能，同時也期望了解甲醇燃料在電池模組之入口壓力變化下，是否也會影響其放電輸出之效能。最後，也觀察甲醇燃料電池於長時間放電操作下，其輸出功率是否穩定。
經由本研究所獲得之結果如下：(1)甲醇燃料溫度愈高，其放電效能愈佳。以40℃與20℃比較，40℃之輸出功率較20℃之輸出功率高165%倍。(2)甲醇燃料的入口壓力，並非壓力愈高輸出功率愈佳，而以甲醇液面高度與電池模組入口H=21.2mm時，有最佳的輸出功率。(3)對於甲醇燃料長時間放電實驗發現，其放電穩定性，隨甲醇燃料體積增加而呈正比例增加。

關鍵字

甲醇燃料電池 ； 溫度 ； 壓力 ； 放電時間

並列摘要

This paper presents experimental results concerning the discharging electrical efficiency of directed methanol fuel cells. The testing included the temperature effect on methanol fuel, the pressure effect of a fuel inlet on methanol fuel and the analysis of stability of discharging electrical discharge efficiency of methanol fuel over a long period. From the experimental results, we can understand whether temperature factor effects the electrical discharge efficiency of methanol fuel. Also, we found whether the pressure on a fuel cell inlet effects the electrical discharge efficiency. Finally, we inspected whether the electric discharge from methanol fuel is stable over a long time.
The experimental results of this paper are represented as follows: (1) The higher the temperature of the methanol fuel is, the better electrical discharge efficiency is. The output power at 40℃ is 165% higher than that of 20℃. (2) Fuel inlet pressure increase on methanol fuel cell is not helpful for the power output. When the pressure differential between inlet and fuel surface is H=21.2 mm, we found that the output power of a methanol fuel cell peaked. (3) For electrical discharge stability of methanol fuel, we found that it increases directly proportional to the volume of methanol fuel.
This paper presents experimental results concerning the discharging electrical efficiency of directed methanol fuel cells. The testing included the temperature effect on methanol fuel, the pressure effect of a fuel inlet on methanol fuel and the analysis of stability of discharging electrical discharge efficiency of methanol fuel over a long period. From the experimental results, we can understand whether temperature factor effects the electrical discharge efficiency of methanol fuel. Also, we found whether the pressure on a fuel cell inlet effects the electrical discharge efficiency. Finally，we inspected whether the electric discharge from methanol fuel is stable over a long time.
The experimental results of this paper are represented as follows: (1) The higher the temperature of the methanol fuel is, the better electrical discharge efficiency is. The output power at 40℃ is 165% higher than that of 20℃. (2) Fuel inlet pressure increase on methanol fuel cell is not helpful for the power output. When the pressure differential between inlet and fuel surface is H=21.2 mm, we found that the output power of a methanol fuel cell peaked. (3) For electrical discharge stability of methanol fuel, we found that it increases directly proportional to the volume of methanol fuel.

並列關鍵字

methanol fuel cell ； temperature ； pressure ； discharging time