臺灣博碩士論文加值系統

固態氧化物燃料電池(SOFC)結合汽渦輪機(GT)發電為一常見提升燃料使用效率之發電設計，本篇研究透過結合SOFC/GT與結合消耗溫室氣體之合成氣產生程序設計出同時滿足低碳排放兼具高效率之混合發電系統。

首先透過Aspen Plus軟體建立燃料處理程序以及後燃器、汽渦輪機發電等程序，接著透過Simulink軟體建立固態氧化物燃料電池模組。經由模擬結果發現，由二氧化碳-甲烷重組器串接於傳統甲烷-蒸汽重組器之後的燃料處理設計所提供含1.7%二氧化碳之溫室氣體燃料對於SOFC電力輸出有正面效益，所建立之1-MW量級混合發電系統之效率達86.5%，並且經過熱整合的設計將熱交換網路年總成本減少28.4%。

最後，透過整合Aspen Plus Dynamics與Simulink兩軟體之平台成功實現了混合發電系統之動態模擬，並且觀察到進料改變對系統效能的影響之非線性特性以及反向響應的出現。

This research combined SOFC/GT with the greenhouse-gases-consuming syngas production process to provide a high efficiency and low carbon-emission hybrid power generation system design. The modeling and simulation is demonstrated by the software, Aspen Plus and Simulink. The fuel processing process connected a CO2 reformer behind traditional steam-methane reformer to provide syngas as fuel for SOFC stack and the simulation result showed that the fuel with only 1.7% CO2 content is beneficial to the SOFC stack. The 1-MW class hybrid power generation system performed high efficiency up to 86.5% and the total annual cost of the heat exchanger network has reduced 28.4% through the heat integration design. Finally, the dynamic simulation is successfully demonstrated by an integrated platform using Aspen Plus Dynamics/Simulink. Also, the effects of input change to the system performance and the nonlinear and asymmetry characteristics of the system have been observed.

目錄
摘要 I
Abstract III
誌謝 IX
表目錄 XIII
圖目錄 XV
符號表 XVII
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究目的與動機 4
第二章 理論與模型建立 5
2.1 燃料處理部分 6
2.1.1 熱力學性質 7
2.1.2 物理性質 7
2.1.3甲烷蒸汽重組反應 8
2.1.4 甲烷二氧化碳重組反應 10
2.2 固態氧化物燃料電池(SOFC)模組 12
2.2.1 燃料電池數學模式之假設 13
2.2.2 固態氧化物燃料電池系統模擬 14
2.2.3 燃料電池電化學模型 14
2.2.3.1 活化過電位 16
2.2.3.2 歐姆過電位 17
2.2.3.3 濃度過電位 18
2.2.4 燃料電池之動態質量守恆 19
2.2.5 燃料電池之能量守恆 21
2.2.6 燃料電池尾氣結合汽渦輪機發電程序 23
第三章 混合發電系統穩態操作與效能分析 25
3.1 燃料處理程序反應器介紹 26
3.1.1 水對二氧化碳-甲烷重組反應之影響 27
3.2 燃料電池穩態操作與效能分析 28
3.2.1 進料溫度對燃料電池之影響 31
3.2.2 進料壓力對燃料電池之影響 33
3.2.3 二氧化碳進料對於燃料電池之影響 34
3.2.4 燃料電池模組效率分析 35
3.3 汽渦輪機發電系統效率分析 37
3.4 混合發電系統熱整合 43
3.4.1 熱整合成本計算方式 44
3.4.2 熱整合設計與結果 47
第四章 混合發電系統動態操作與分析 54
4.1 甲烷進料流率改變對系統之影響 54
4.1.1 甲烷進料改變對燃料處理程序之影響 55
4.1.2 甲烷進料改變對燃料電池模組之影響 57
4.1.3 甲烷進料改變對汽渦輪機發電之影響 60
4.2 水進料流率改變對系統之影響 61
4.2.1 水進料改變對燃料處理程序之影響 61
4.2.2 水進料改變對燃料電池模組之影響 63
4.2.3 水進料改變對汽渦輪機發電之影響 65
4.3 二氧化碳進料流率改變對系統之影響 66
4.3.1 二氧化碳進料改變對燃料處理程序之影響 66
4.3.2 二氧化碳進料改變對燃料電池模組之影響 67
4.3.3 二氧化碳進料改變對汽渦輪機發電之影響 69
第五章 結論與展望 72
參考文獻 73

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