蒸發發電試片研究

The Study of the porous materials in generating electricity by evaporation

王亮鈞(Liang-Jiun Wang)

指導教授 ： 林育才

元智大學/工程學院/機械工程學系/碩士(2011年)

https://doi.org/10.6838/YZU.2011.00287

摘要

本論文係利用實驗分析探討去離子水（DI water）在通過具有微米孔隙之試片時，因毛細現象和蒸發作用力的驅動，將電雙層內之離子帶動至試片上下兩端形成電壓差而產生的發電效應，並測量電壓（streaming potential）對時間之關係圖，估算其最大發電效率。實驗所用的試片材料為水泥、活性碳、mesoporous silica、分子篩（molecular sieve）和廢觸媒等成分混合而成，直徑大小分別為43mm、45mm和85mm，工作流體為去離子水，並將環境控制在溫度25℃、50℃和濕度40%RH下進行實驗。
　　實驗結果發現試片發電量與溫度並無絕對的關係，而升高或降低pH值能夠有效的增加發電效率。而在多孔性材料的選用方面，mesoporous silica效果高於分子篩；若在水泥中加入廢觸媒，對於提高電壓也有幫助。目前發電量最大的試片成分組合為水泥15g、活性碳10g和mesoporous silica 10g，可達到11.07W/m2；而成分組合為水泥40g、活性碳20g和分子篩35g時，發電電壓可達到1.25V，發電功率約6.26 W/m2次之。

關鍵字

電雙層 ； 流動電位 ； 多孔性材料 ； 蒸發

並列摘要

In this study, experiments have been conducted to produce streaming potential of the combined material of mesoporous silica, molecular sieve, activated carbon and cement with microfluidic substrate passing DI water through it. The time dependence of the streaming potential has been measured and the corresponding maximum generated power has also been investigated for different combination of materials. The diameters of the specimen studied are 43mm, 45mm and 85mm. The experimental environment is at 25℃, 50℃ and 40%RH.
　　It is found that the generated power is irrelevant to temperature and that generally, streaming potential rises dramatically with pH value. The results also show that the specimen which consists of cement 10g, activated carbon 10g and mesoporous silica 10g can achieve maximum power of 11.07W/m2 and that the specimen with cement 40g, activated carbon 20g and molecular sieve 35g can reach a maximum power of 6.26 W/m2.

並列關鍵字

strwaming potential ； electric double layer ； porosity material

參考文獻

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