- 學位論文
太陽能結合有機朗肯循環(ORC)針對台灣地區環境之系統分析設計與參數最佳化
System Analysis and Parameter Optimization of a Solar Organic Rankine Cycle (ORC) Used in Taiwan Area
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摘要
太陽能作為一種可再生能源，但是太陽能輻射照度能量密度較低不利於應用。而有機朗肯發電系統(ORC)可依熱能條件，選用適合的工作流體，可以以低溫物質為熱源，從而解決了低溫熱源中的能量不能被傳統發電設備利用的難題，而且ORC動力系統穩定性佳、可靠度高，且發電效率相較於一般的低階熱能發電系統高符合太陽熱能的特性，因此，本研究將太陽能結合有機朗肯循環發電系統，建立模型進行模擬，分析新竹、花蓮、蘇澳、澎湖、恆春等台灣五地區之日照量，建立太陽能有機朗肯循環資料庫。 本研究經過理想條件假設後，能夠掌握到太陽能ORC系統各點的熱力性質與設計限制條件，完整分析整套系統，進行各項參數的最佳化，並且針對台灣地區對於小型社區設置太陽能ORC的運作狀況進行分析，設定其集熱器面積為50平方公尺(約1/2民宅面積)，進行最佳化後選定ORC工作流體為R245fa，設定蒸發溫度為140℃且集熱器高溫為190℃，發電量為3kW；經過分析計算系統發電量與效率，建立各地太陽能ORC系統資料庫，評估太陽能ORC在台灣運作的可行性。
並列摘要
As a renewable energy, solar energy is hard to use because of low energy density. However, Organic Rankine Cycle power generation systems (ORC) are very suitable to use solar energy, since ORC can select different working fluids to match different kinds of heat conditions. Moreover, the ORC is more stable, highly reliable, and with higher system efficiency then other kinds of low-thermal power generation systems. As a result, solar heat energy combined with ORC is used in this study. Then we build a solar ORC simulation model to analyze the solar irradiation for five areas in Taiwan (Hsin-Chu, Hua-Lien, Su-ao, Peng-Hu, and Heng -Chun). Once establishing the model in the study, we can set the thermal properties and the boundary conditions for the system. Consequently, we can find the optimization parameters for Taiwan environmental conditions. Using small community of Taiwan as scenario simulation in the study, we set the collector area of 50 square meters, and select R245fa as ORC working fluid. Also, we set the evaporating temperature of 140℃ and the solar heat collector temperature of 190℃, to generate 3kW of power. Finally, we can construct a Solar Organic Rankine Cycle database to study future solar ORC systems in Taiwan
參考文獻
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