浮游式黑潮渦輪發電機佈放與回收模擬之研究

Abstract

為了因應與日俱增的能源需求及對於再生能源開發的全球趨勢，擁有黑潮能源流經的台灣也開始致力於海洋能源的開發。然而台灣海洋能源開發技術剛起步而尚未成熟，尤其沒有在大水深環境下佈放與錨碇浮游式渦輪發電機系統之經驗，這類系統之性能及運作情形也還有待釐清，因此，建立適當的模擬與分析工具以預先掌握系統的運作狀況及其可行性實有其必要。 本研究主要乃利用在海洋油氣開發領域應用上相當成熟的模擬軟體OrcaFlex，建立浮游式黑潮發電渦輪機(Floating Kuroshio Turbine；FKT)之數值模型進行佈放與回收模擬，並配合計算流體力學(Computational Fluid Dynamics；CFD) 軟體ANSYS-FLUENT進行各元件之流體動力係數之計算。 而作為分析方法及工具的開發，本研究提供了在OrcaFlex環境中FKT系統模型的建構方式，並針對設計之腳本進行佈放與回收作業之模擬與探討，確認以CFD軟體ANSYS-FLUENT計算出的流體動力係數結果配合應用OrcaFlex就FKT的佈放與回收作業腳本模擬可得到合理的結果。

In response to the growing energy needs and the global trend to develop renewable energy, we are also dedicated to developing marine energy from Kuroshio Current, which flows through the eastern waters of Taiwan. However, due to the lack of the offshore technological experience of constructing and deploying floating turbines with permanent mooring system in deep water before, the deployment and recovery operation procedures for such kind of a floating turbine system need to be validated and clarified. Therefore, establishing proper modeling and analysis tools to evaluate the operation procedures and the feasibility of the present Floating Kuroshio Turbine (FKT) in advance is necessary. In the present study, for developing the analysis method and tool we use OrcaFlex software to create the numerical model of the FKT, and apply Computational Fluid Dynamics (CFD) software ANSYS-FLUENT to calculate the hydrodynamic coefficients of each element of the FKT. This study presents a method for constructing FKT system in OrcaFlex environment, and run simulations basing on the hydrodynamic coefficients computed by CFD. Simulations following the planned scenario show reasonable result, and the validity of the presented method is confirmed.