Technology of LED Illumination by Hydraulic Power
碩士 === 國立成功大學 === 工程科學系碩博士班 === 95 === 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...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/94378637797569602364 |
| Summary: | 碩士 === 國立成功大學 === 工程科學系碩博士班 === 95 === 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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