近年來，隨著科技日新月異，能量的使用增長，為求減少環境氣候問題，本論文嘗試架設以太陽能為初始能源，期望設計出一個能量轉換系統來將太陽能源轉換成日常生活使用的能量。本論文設計兩個混和系統，分別為PEME(Proton Exchange Membrane Electrolyzer，簡稱PEME)系統搭配SOFC(Solid Oxide Fuel Cell，簡稱SOFC)系統，以及SOEC(Solid Oxide Electrolysis Cell，簡稱SOEC)系統搭配SOFC系統，當在白天時SOEC與PEME將太陽能轉化成氫氣儲存，至夜間時氫氣透過SOFC系統化學反應釋放出電能使用。
本研究為了探討再生能源系統搭配SOFC系統和高低溫電解系統對於整體發電功率與效率的影響，進而以數值模擬的方式進行系統性能的分析。此外，為了提高系統能量使用以及貼近實際運轉狀態，本研究在系統迴路設計的過程中，結合熱交換器、熱機、製造熱水裝置輔助SOFC電池堆、SOEC電解池堆、PEME電解池堆，達到完成的複合式迴路設計。另一方面，在數值計算針對熱交換器使用ε-NTU方法整合組件熱損失評估，結合熱機使用有限時間熱力學方法分析，完成系統熱質能平衡計算與性能評估。
此外，本文透過熱效率、電效率、產氫效率、總輸出電功、總輸出能量、熱損失、Exergy損失與Exergy效率等各項指標進行系統性能與效率的評估，並且透過探討溫度效應、空氣流率效應與燃料利用率等參數分析系統各項指標能力。經由分析可知，SOFC系統在輸出功率為40.71 kW下電效率可達60.72%、熱效率可達85.28%；SOEC系統在輸入功率為105.61 kW下產氫效率可達71.44%、熱效率可達89%；PEME系統在輸入功率為119.55 kW下產氫效率可達84.56%、熱效率可達87.33%。
透過完成本研究可以發現，雖然SOEC擁有較高的電解性能，然而在系統迴路的設計過程中，若考量系統損失與熱需求，其整體產氫效率會低於PEME之電解模組，故說明進行複合式系統分析時，除了考量系統單一模組性能外，亦需要考量系統迴路設計與組件熱損失的影響。本文之相關研究成果，可供未來產業實際迴路設計時，作為分析之依據，進而降低實驗建置之經費。

In recent years, with the rapid advancement of technology and increasing energy consumption, there is a growing need to address environmental and climate issues. This paper aims to set up a solar energy-based system and design an energy conversion system to transform solar energy into usable energy for daily life. Two hybrid systems are proposed in this paper: the Proton Exchange Membrane Electrolyzer (PEME) system combined with the Solid Oxide Fuel Cell (SOFC) system, and the Solid Oxide Electrolysis Cell (SOEC) system combined with the SOFC system. During the daytime, the SOEC and PEME systems convert solar energy into hydrogen for storage, which is then utilized through the SOFC system to generate electricity during the nighttime.
This study investigates the impact of integrating renewable energy systems with the SOFC system and high-temperature/low-temperature electrolysis systems on overall power generation and efficiency. Numerical simulations are employed to analyze the performance of the system. Additionally, to improve the energy utilization of the system and make it closer to real operating conditions, this study incorporates heat exchangers, heat engines, and devices for producing hot water into the system loop, assisting the SOFC cell stack, SOEC electrolysis stack, and PEME electrolysis stack, achieving a comprehensive loop design. Furthermore, in the numerical calculations, heat losses in the heat exchangers is assessed with the ε-NTU method, and finite-time thermodynamics methods are applied to analyze the thermal and exergy balance of the system.
Moreover, this paper evaluates the system performance and efficiency using various indicators such as energy efficiency, electrical efficiency, hydrogen efficiency, total electrical output power, total output energy, heat losses, and exergy losses and efficiency. The effects of temperature, air flow rate, and fuel utilization on these indicators are also analyzed. The results show that the SOFC system achieves an electrical efficiency of 60.72% and an energy efficiency of 85.28% at an output power of 40.71 kW. The SOEC system achieves a hydrogen efficiency of 71.44% and an energy efficiency of 89% at an input power of 105.61 kW. The PEME system achieves a hydrogen efficiency of 84.56% and an energy efficiency of 87.33% at an input power of 119.55 kW.
Through this study, it is found that although the SOEC system exhibits higher electrolysis performance, considering system losses and thermal demand during the system loop design, its overall hydrogen efficiency is lower than that of the PEME electrolysis module. This indicates that when conducting a comprehensive system analysis, not only individual module performance but also the impact of system loop design and component heat losses need to be taken into account. The research findings presented in this paper can serve as a basis for analyzing and reducing the cost of experimental setup in future industrial loop designs.

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