因應全球暖化危機與極端氣候威脅，台灣正積極落實「2050淨零排放路徑」，規劃大幅提升太陽光電與離岸風電等再生能源占比。然而，間歇式能源的大量併網使電網面臨「鴨子曲線（Duck Curve）」的嚴峻挑戰，導致日落後的夜尖峰時段急需穩定、且具備快速升降載能力的可調度電力（Dispatchable Power）以維持系統穩定。現有調度手段多仰賴高碳排的火力發電和發展潛能較小且需耗能的抽蓄水力，而傳統地熱亦受限於天然高滲透率儲層的探勘困難與微震風險，難以全面滿足彈性調度的需求。
為突破此困境，本研究聚焦探討具備高度調度彈性與安全性的U型閉迴路先進地熱系統（U-shaped Closed-Loop Geothermal System, UCLGS）。該技術無需依賴天然含水層，極度契合台灣東半部高地溫但低孔隙率的地質條件。台灣次世代地熱蘊藏高達40GW的豐沛潛能，配合政府於2026年公告8.5522元/度的次世代地熱躉購費率，展現出極高的發展野心和規模化的開發價值。
本研究將UCLGS加入「地熱電池（Thermal Battery）」概念，提出因應電網需求的調度式發電策略：於白天太陽能充裕的8小時進行關井（Shut-in）或降載，利用岩石熱傳導吸收遠場熱量以恢復地層溫度；並於夜尖峰電力缺口時段，利用蓄積的熱能進行高流量集中發電。本研究將透過數值模擬方法，深入探討此操作模式下的取熱與發電效益，同時執行技術經濟評估，旨在尋求最佳的地熱調度發電方案，為緩解鴨子曲線效應提供具備實務工程與商業價值之解方。

In response to extreme weather and the "2050 Net-Zero Emissions Pathway," Taiwan is significantly expanding renewable energy. However, integrating intermittent energy creates a "Duck Curve," demanding stable, dispatchable power for evening peaks. Current dispatch methods rely on high-emission fossil fuels or limited pumped-storage hydro, while conventional geothermal faces exploration and micro-seismic risks. To address this, we focus on the U-shaped Closed-Loop Geothermal System(UCLGS).
UCLGS operates independently of natural aquifers, making it highly suitable for eastern Taiwan's high-temperature, low-porosity geology. With 40 GW of potential and favorable tariffs, it holds immense scalable value. By integrating a "Thermal Battery" concept, this study proposes a dispatchable strategy: daytime shut-ins for thermal recovery and high-flow concentrated generation during evening power shortfalls. Through numerical simulation and Techno-Economic Analysis(TEA), we aim to find the optimal strategy to mitigate the duck curve.

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