碩士 / 國立雲林科技大學 / 機械工程系碩士班 / 100 / The purpose of this research is to explore the Light Emitting Diode(LED) bulb’s thermal situation in natural convection, investigated the LED light bulbs currently on the market to sell most of them can antipyretic to 9W, but the use of semiconductor fabricated, although can antipyretic, but the production costs, the price is much higher, the experiment using the lower cost of hollow aluminum tubes stacked to make the heat sink, plus a chimney effect to increase the airflow velocity as the analog spindle. Used in this experiment simulation software for SolidWorks Flow Simulation to simulate the design of the heat sink to elect a better heat sink, to make the entity to make the numerical simulation
value compared to the temperature distribution and airflow chart to illustrate the simulation of the phenomenon.
The simulation results show that requires a lot of area in the first layer near the heat source to heat conduction, while the second part of the need for air convection section, air can be introduced into the chimney, while the length of the chimney is one of the keys is too close to heat source effectively guide the air, it will impede the flow of air flow.
The experimental results show that, implement 6 and implement 8 refer to commercial bulb height, the system for 14 of layers , the experimental results, by adding chimneys to reduce about 2 ℃.
Although the chimney effect of the experiment to increase the heat sink thermal
performance, but the aluminum tubes stacked some difficulties in the process, can’t mass production, in addition to find a way, be possible listing.
| Identifer | oai:union.ndltd.org:TW/100YUNT5489020 |
| Date | January 2012 |
| Creators | Pei-ju Lin, 林佩如 |
| Contributors | Ing- youn Chen, 陳英洋 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 88 |
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