重力式水輪機性能探討

Investigation of performance and characteristics of gravity water wheel

李欣庭(Shin-Ting Lee)

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(2018年)

https://doi.org/10.6342/NTU201802269

摘要

再生能源為目前國際在乎之重要情事，而微型水力發電為目前具潛力開發的能源種類，適當的利用其安裝方便、較短回收年限與高效率等優點，可以坐收再生能源運用之利。本研究與國內公司合作，測試其微型水力發電設施。以其為現有技術之基礎，參考國內外相關文獻，利用縮小模型機進行實驗與探討，模擬現實發電設施。以因次分析之相似性原理，將研究應用到現實機台，期望能得到降低測試成本的目的，提高現有之機型效率。本研究中，探討各式上游水文狀況對於上射式水輪機發電性能的比較，以模型機進行實驗，藉由改變上游水流量、出口偏移距離等，逐一比較並分析實驗結果數據，而得到成果與結論。針對配合之原型機進行測量，比較兩者操作時的無因次參數差異。其後，同樣針對川流式水輪機，測試浸水深度對發電性能的影響。實驗成果中，歸納出一些相互影響的關係，以無因次參數為主，將在本文中呈現。

關鍵字

重力式水輪機 ； 水力發電 ； 因次分析

並列摘要

Micro hydropower, as a potential renewable power source, testing under estimation, has been received more and more concern by countries in recent years. Gravity waterwheels, which is mainly driven by potential energy, are used owing to its simplicity in constructing, short payback period, and eco-friendly features. In order to study the performance of each kinds of waterwheels, researcher arranged the wheel, generator, load, and other related equipment to generate electricity, to test the already built ones; for an overshot waterwheel, researcher made a scaled model machine and operated under different upstream conditions controlled, that is, the flow rate and the distance between the wheel shaft and upstream channel end, to test how these variables affect the wheel efficiency. For the stream waterwheel, researcher tested the real machine under different immersed radius ratios. The scope of the presented thesis is to show the relation between each parameters and to find an optimized one. Results of each experiments are shown in this thesis.

並列關鍵字

gravity waterwheel ； micro hydropower ； dimensional analysis

參考文獻

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