臺灣博碩士論文加值系統

隨著LED元件效能的需求增加以及封裝尺寸越來越小，所產生的熱能也就越來越高，為了增加散熱的速度以及效率，解決方法大部分都以增加散熱體積選用良好的散熱材質為主要方向，目前鋁製散熱板被廣泛應用，因鋁合金具有良好的散熱效果、容易加工、成本便宜因此廣泛被使用，成為各種電子元件以及LED的主要散熱材料。
本研究利用快速以及節省成本的套裝分析軟體FLUENT以及風洞試驗機進行簡易的溫度場分析，主要以鰭片穿孔增加空氣對流的面積量，進而達到改善鰭片散熱與減輕鰭片重量等效果。
最後將實驗值與分析結果比較是否吻合，再進行鰭片設計更改以助於鰭片散熱效能有所增加。對於實驗發現適度的穿孔，可以改善熱阻，但過度穿孔會導致金屬熱傳受到破壞，以至於造成反向效果，也是探討的方向。

As the demand of performance LED components increased and package size decreased, the heat generated more than before. The most popular ways to accelerate the cooling procedure are increase the contact area for cooling and choose the suitable materials. Aluminum heat plate is widely used for the cooling procedure, because aluminum possesses good heat dissipation, easy processed and low cost.
In this study, we implemented experiment by using FLUENT, compare the results with results of temperature field by using wind tunnel testing machine. The proposed method is using the perforated fin to increase the contact area to improve the cooling speed and fin weight. We compared settings with experimental analysis, then designed suitable fin to increase cooling efficiency.
The experimental results showed use perforated fin will decrease thermal resistance but there will be bad effect for over-perforate because of destroying heat conducting of mental.

目錄
摘要 i
Abstract ii
誌謝 iii
目錄 iv
圖目錄 v
表目錄 viii
第一章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究目的 7
第二章 理論分析 9
2.1 熱阻理論 9
2.2 壓降理論 10
第三章 實驗模擬設備與步驟 16
3.1 實驗設備 16
3.2 實驗步驟 18
3.3 實驗模型材質特性 19
3.4 軟體介紹 20
第四章 模擬與實驗結果討論 32
4.1板型鰭片實驗模擬比較 32
4.2穿孔鰭片實驗模擬比較 33
4.3板型與穿孔鰭片模擬比較 34
第五章 結論 64

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