垂直阻力型水輪機性能探討

Investigation of performance and characteristics of Savonius type hydrokinetic turbine

劉嚴少(Yen-Shao Liu)

指導教授 ： 陳希立

國立臺灣大學/工學院/機械工程學研究所/碩士(2020年)

https://doi.org/10.6342/NTU202000164

摘要

近年來世界各國積極發展環保綠能，水力發電在綠能尤其重要，本文著重在微型水力發電的實驗上，探討垂直型阻力渦輪機(Savonius)的性能表現，參考其他學者之文獻，研究兩水輪機之間的互相影響，並且測試兩水輪機的不同相對位置擺放如何影響Cp，期望找出最佳的Cp並且實際量產水輪機，幫助台灣以及發展中國家的綠能產業。實驗分為水輪機相對位置之影響及水輪機葉片數的影響，相對位置又可分為水平擺放及垂直擺放；葉片數則有三葉片、六葉片、八葉片三種不同水輪機，實驗結果發現三葉片水輪機在相同流場條件下轉速最快，而三種水輪機水平擺放X/D=1時Cp較單一水輪機提升10-12%，垂直擺放實驗中兩者距離越靠近前水輪機Cp提升越多，Y/D=1.5時Cp提升約15%，但兩水輪越接近後水輪Cp則降低越多，Y/D=1.5時Cp降低約65%，垂直擺放最佳位置為兩者距離Y/D=5，在葉片數的比較上發現三片水輪機較六葉片水輪機Cp高出10-15%；較八葉片水輪機高出30-35%，由此可知三葉片的設計最佳，且水輪機之葉片數若高於三葉片，則葉片數越高Cp下降越多。

關鍵字

微型水力發電 ； 垂直阻力渦輪機 ； 葉片數 ； 兩水輪機之交互影響

並列摘要

In recent years, countries around the world actively develop green energy.Hydropower plays an important role in the development of green power. This study focuses on the micro hydro power.Investigate the performance and characteristics of Savonius type hydrokinetic turbine. The author refers to the literature of other scholars and research the interaction between two hydrokinetic Savonius turbines to examine how the different relative positions of the two turbines affect Cp.The author is looking forward to finding the best efficiency to produce the large number of turbines and help the development of green energy industry in Taiwan and developing countries. The experiment is divided into the influence of the relative position of the turbine and the number of turbine blades.The relative position experiment is devided into two Savonius turbines running side by side or arranged in line.The blades of turbines can be classified as three blades,six blades and eight blades.The results show that in the same system,three-blades turbines turn fastest.When turbines are placed at X/D=1,the Cp is 10% higher than the single turbine.In the experiment of turbines arranged in line,the closer the distance,the higher the Cp of front turbine.Cp is increased by 15%, but the Cp of the back turbine is decreased by 65%.Therefore, the best position of turbines arranged in line is Y/D=5. The Cp of three blades turbine is higher 10-15% than six blades turbine and is higher 30-35% than eight blades turbine. Obviuosly three blades turbine is the best design. The more blade number, the lower Cp.

並列關鍵字

micro hydropower ； Savonius type ； blades ； interaction between two Savonius hydrokinetic turbines

參考文獻

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