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標題: MR21型式發光二極體燈具散熱器之熱分析與結構探討
The Thermal Analysis and Structure Study of Heat Sink for MR21-Compatible LED Lamps
作者: 黃俊彥
Huang, Jyun-Yan
關鍵字: LED;發光二極體;heat sink;Icepak;散熱器
出版社: 精密工程學系所
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使用於一般室外環境之發光二極體燈具,可利用裝設具有散熱鰭片之散熱器、熱導管或水冷卻等裝置,以空氣自然或強制熱對流等方式將廢熱排除。但如是用於室內照明則因須考量空間配置、製造成本、噪音壽命等因素要求下,以散熱器單純配置散熱鰭片的方式最為常用。本文即以市售共通規格之MR21-Compatible LED Lamps為標的,測量散熱器及金屬印刷基板溫度,利用電子熱傳分析軟體Icepak,以數值分析模擬溫度之方式交互驗證結果。後續以自然熱對流,輸入功率10W之前提下,討論散熱器之散熱器形狀、基座及側壁厚度、散熱鰭片形狀、高度、間距與鰭片長度等各種不同之參數設定,對散熱器整體性能的影響,並提出改善方法提供廠商作為後續開發之參考依據。

There are many merits for Light Emitting Diode ( LED ) such as low power consumption, long-lift, compact volume, color-rich, etc. However, the photo-electric conversion efficiency is still lower than 20% and lots of heat is generated consequently. Thus how to manage the heat produced by the LED is a crucial and important issue which directly affects the life and performance of the LED usage.
The common methods employed to dissipate the heat generated by outdoors LED lamps or lanterns are usually having the forms of fins heat sink, heat pipe, or cooling water setups etc. For the indoor application and considering the available space, fabrication costs, noise factors, the most widely used way is the heat sink with many slices of heat dissipation fin. In this thesis, using the MR21-Compatible LED Lamps as the real model, we use the software “Icepak” to study and simulate it's heat and temperature distribution. Also the temperature of the printed circuit board ( PCB ) and the heat sink at different location are measured and the data are used as the reference and verification for the validity of the simulation. Several factors which may affect the performance of the heat sink are analyzed with the software, such as the geometry, the thickness of substrate / sidewalls, the height, shape, of the fins and the distance between them. Besides the effects of the above-mentioned factors for the heat dissipation ability of the heat sink are present, some other suggested methods to improve the heat exchange efficiency are also proposed in the end.
其他識別: U0005-2501200812274300
Appears in Collections:精密工程研究所

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