本研究之目的在於研製一微型水力發電系統，以驅動高功率LED 照明。利用數值方法配合實驗測試，找出高效能之水力與幾何設計之發電機轉子葉片。根據葉片設計理論估算葉片之幾何參數，將CAD 所建立之模型以CFD 套裝軟體進行流場之數值分析。微型水力發電系統之測試，則以模擬之較佳轉子葉片葉型為實做模型之依據，進行位能與動能測試，並找出系統之最佳操作點。
CFD 模擬結果顯示，在葉片數量7 片、輪轂為流線型與葉片進口角度為120°之葉型具有較佳之效率，由流場分析之速度與壓力分佈可觀察出並無顯著之渦漩與二次流現象發生。水力發電系統測試結果，在位能測試方面，在高度差為13 cm 時，流速約1.6 m/s、轉子轉速546 rpm，發電電壓為2.26V，即可驅動LED，其能量轉換效率約68％，而總效率為1%；動能測試則利用增速齒輪組將發電機轉子轉速提高，使達LED之驅動電壓，當流速為0.6 m/s 時，系統所搭配之齒數比為2.5，葉片轉子轉速為200rpm，經由增速傳動到發電機轉子即可達500 rpm 之LED驅動轉速，系統之發電電壓達2.2V，其總效率可達約1.5%。

This study aims to design a Micro-Hydraulic Power Generator System (MHPGs) and to light up LEDs. By CFD simulations and the experiments, the hydraulic and geometric designs of high efficiency blades have been investigated. The geometric parameters of the blade are worked out by lumped design theories. The flow fields and the performance curves are then analyzed by a CFD software. The designed MHPGs are tested using both potential and kinetic energies to obtain the operation points for LED lighting.

The CFD simulations show that the case of 7 blades with streamlined hub and inlet angle 120° performs better. According to the velocity and pressure distributions, the fluid field shows no vortices and secondary flows. Potential tests reveal that the MHPGs can light up an LED. when the height difference is 13 cm. The mechanical energy conversion efficiency is about 68% and total efficiency is about 1%. In the kinetic energy test , a gear pair with gear ratio of 2.5 can increase the rotational speed of the generator. The MHPGs can generate 2.2V to light up a LED and the total Efficiency is about 1.5%.

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