本文針對集光式太陽熱能發電(concentrating solar power, CSP)系統的性能進行模擬，並評估台灣設置CSP系統的可行性。太陽熱能屬於再生能源的一種，不同於一般太陽光發電，CSP系統是藉由聚光型收集器收集太陽輻射，加熱流體帶動朗肯發電循環發電。由於太陽能為取之不盡的天然資源，且美國加州的SEGS (solar electricity generating systems)自1984年以來有很成功的商業運轉記錄，故已有數個國家正資助相關的CSP的研究。 本文考慮的CSP系統模擬以裝置容量30 MW的SEGS VI為原型，使用TRNSYS軟體建立模型，搭配台灣地區氣象資料模擬CSP系統在冬、夏兩季的發電性能，並觀察不同熱傳遞流體條件對CSP性能的影響。分析顯示由於台灣夏季的日照充足且穩定，系統效率維持19%，而冬季的日照條件相對較差，使得CSP發電效果不佳。 此外，以整年日照情況與發電系統的土地使用量轉換(land transformation)進行分析，當年日照量分布約在800~1500 kW/m2a時，相較於PV系統並無明顯優勢，CSP系統的土地需求大於600 m2/GWh，遠高於火力及核能發電廠所需。但是另一方面，CSP系統的CO2排放量相較於火力和核能電廠就相當少，僅為13 gCO2e/kWh。就分析結果而言，台灣先天日照量的不足限制了CSP系統輸出性能，但CSP系統與火力及核能發電相比較則各有其優缺點，經過適當的規劃，台灣有機會以CSP取代部分現有的發電系統，達到CO2減量及能源自?的目標。 This research focuses on simulation of concentrating solar power (CSP) and feasibility assessment of this technology in Taiwan. Unlike conventional concentrating PV system, solar thermal power energy collected solar irradiation by concentrated collector to heating the HTF and drive the Rankine cycle. The Solar Electric Generating Systems (SEGS) in California has a long and successful commercial operation record since 1984, therefore several countries are funding CSP research. This study chooses the SEGS VI system (install capacity is 30 MW) as the prototype, and use TRNSYS to incorporate Taiwan’s weather data to simulate the performance of CSP plant in different season and with various heat transfer fluids (HTF). Because low irradiation in winter which is not enough to support CSP system, results show poor electricity production for such system in Taiwan. Furthermore, compare to conventional PV system, CSP had no advantage in land transformation for the range of annual irradiation 800~1,500 kWh/m2-a. The required land transformation of CSP is larger than 600 m2/GWh, which higher than that of coal-fired and nuclear power plant. On the other hand, CSP emit much lower CO2 amount (13 gCO2e/kWh) than coal-fired and nuclear powerplants. It can reduce greenhouse gas effectively. Therefore, limitations and advantage are coexist for developing CSP system in Taiwan.
