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研究生:潘志鴻
研究生(外文):PAN-ZHI-HOUNG
論文名稱:筆記型電腦散熱鰭片之改善
論文名稱(外文):A Study on the Improvement of Fin Performance for Notebook Computers
指導教授:洪俊卿
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:機械工程系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:186
中文關鍵詞:散熱散熱鰭片交錯型式鰭片凸點型式鰭片
外文關鍵詞:FinsOffset-strip finsDimpled fins
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摘 要
本論文主要在探討各種不同型式之散熱鰭片對筆記型電腦散熱模組性能的影響,包含各種不同型式鰭片,在風扇轉速為4200rpm(3.5V)、5200rpm(5V)下,散熱模組之溫度分佈及鰭片熱阻與總熱阻值之差異比較。以提供往後對筆記型電腦散熱模組之設計做參考。
本研究將分為兩大實驗,Case(1)主要改變鰭片之型式,分別為正常型式、交錯型式、凸點型式,比較改善其熱阻值。Case(2)主要是改變鰭片角度之型式,找出最佳的迎風角度,最後再將最佳角度之鰭片型式與無傾斜(0度)之鰭片作不同比例分配之混合,以找出最佳的比例分配。
實驗結果顯示得知,(1)交錯型式能明顯有效的改善鰭片熱阻值。(2)凸點型式也改善其鰭片熱阻,但沒有交錯型式明顯。而且當凸點數目增加,鰭片熱阻反而隨之增加,無法較有效的改善。(3)改變鰭片角度之型式,當在角度為10度、15度時,為最佳的迎風角度。當角度20∼45度時,鰭片熱阻也將隨著角度增加而變大。(4)角度為10度、15度之鰭片與角度為0度的鰭片混合時的最佳的比例分配,為當10度、15度佔總鰭片串長的2/3時,其熱阻值比在沒有混合時來的好。
Abstract
This report investigate the effect of different types of fins on the thermal performance heat sinks of notebook computers. The temperature distributions within the heat sink, the thermal resistance of the fin and the thermal resistance of the entire heat sink module is studied experimentally.
The experimental results show that:(1)Offset-strip fins type can reduce the thermal resistance since it can provide higher heat transfer coefficients.(2)Dimpled fins also can reduce the thermal resistance, but no as significant as that for offset-strip fins.(3)Tilted fins have better thermal performances when the tilted angle is 10o and 15o. For tilted angles between 20o ~ 45o, the thermal resistances become higher.(4)For mixed-type fins(by mixing different proportions of 10o and 15o tilted fins with 0o fins),the best proportion of titled fin 2/3
目 錄
誌謝 I
摘要 III
Abstract V
目錄 VI
表目錄 IX
圖目錄 XI
符號索引 XXII
第一章 緒 論 1
1.1 前言 1
1.2 文獻回顧 4
1.2.1 熱管 4
1.2.2 鰭片 8
1.3 研究動機及目的 20
1.4 內容大綱 21
第二章 理論分析 23
2.1 熱網路模型 24
2.2 熱傳導 26
2.2.1 內阻抗 26
2.2.2 接觸阻抗 27
2.2.3 熱管阻抗 30
2.2.4 散熱鰭片之效率 30
2.3 熱對流 32
第三章 實驗設備與方法 35
3.1 實驗設備 35
3.2 鰭片的製作 41
3.3 熱管製作、模組製作及組裝 42
3.4 實驗安裝過程 44
3.4.1模組安裝過程 44
3.4.2 模組性能測試過程 46
3.4.3風扇性能測試過程 47
3.5 熱電偶之校正 48
第四章 實驗結果與討論 49
4.1 各種不同型式之散熱鰭片 50
4.1.1 交錯型式之鰭片 50
4.1.2 凸點型式之鰭片 50
4.1.3 改變角度之鰭片 51
4.2 實驗結果分析 51
4.2.1 各種不同型式鰭片的散熱模組之溫度分佈 51
4.2.2 各種不同型式鰭片的散熱模組之熱阻 56
4.2.3 各種模組之流量測試結果 61
第五章 結論與建議 62
5.1 結論 62
5.2 建議 64
參考文獻 66
作 者 簡 介 186
參考文獻
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