大功率散熱鰭片之熱傳分析

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姓名

黃浩彰(Hao-Jhang Huang) 查詢紙本館藏

畢業系所

機械工程學系在職專班

論文名稱

大功率散熱鰭片之熱傳分析

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至系統瀏覽論文 (2029-9-1以後開放)

摘要(中)

電力電子產品不斷追求高功率密度設計，但並非每個產品都能使用水冷
散熱。在實際應用中，信賴性、維修便利性以及客戶需求等因素都需要考量。
因此，對氣冷散熱器進行優化在實務設計中是必要的。此外，對於大功率機
種，重量和成本也往往是設計需求中的重要考量因素。本研究針對固定體積
下的散熱鰭片進行分析。研究對象的整體高度為90mm，總寬度為204mm，
長度為90mm。單一熱源的發熱量為720W，共有兩個熱源。該散熱模組使
用兩顆9038 風扇。在有限的空間下，通過優化散熱片的幾何參數和散熱鰭
片的傾角特徵進行設計。結果顯示，在有熱管的前提下，改變散熱片底部厚
度對特性影響不顯著。而在鰭片間距固定的情況下，增加散熱片厚度對特性
的改善有顯著幫助。在可變鰭片的條件下，鰭片間距與鰭片厚度的比值在2
到3 之間時，可達到最佳設計效果。前置傾角對風扇壓降的改善較為顯著，
在45 度傾角條件下，特性接近於無傾角情況。後置傾角容易增加系統壓降，
進而影響風扇整體流量，對特性無顯著幫助。中置傾角會稍微增加部分壓降，
但有助於改善散熱片溫升。優化之結果約可改善57%重量並維持相同特性。

摘要(英)

Power electronic products continuously strive for high power density designs;
however, not every product can employ liquid cooling solutions. In practical
applications, factors such as reliability, ease of maintenance, and customer
requirements must be considered. Therefore, optimizing air-cooled heat sinks is
necessary from a practical standpoint. Additionally, for high-power models,
weight and cost are often critical design considerations. This study heat sinks
within fixed dimensions. The overall height is 90mm, the total width is 204mm,
and the length is 90mm. Each heat source generates 720W, with two heat sources
in. The heat dissipation module with two 9038 fans. Within the limited space, the
heat sink design is optimized by adjusting the geometric parameters and
inclination angles of the fins. The results show that with heat pipes, changing the
base thickness of the heat sinks has no significant impact on performance. When
the fin spacing is fixed, increasing the thickness of the heat sinks significantly
improves performance. Under conditions with variable fins, the optimal ratio of
fin spacing to fin thickness is between 2 and 3. The pre-angled fins significantly
improve the fan pressure drop, with characteristics close to those of non-angled
fins at a 45-degree angle. The post-angled fins tend to increase the system pressure
4
drop, thereby affecting the overall airflow of the fan, and provide no significant
benefit to performance. The mid-angled fins slightly increase the pressure drop
but are expected to improve the temperature rise of the heat sinks. The optimized
parameters proposed in this study improve performance by approximately
57%.and keep the same temperature.

關鍵字(中)

★ 強制對流

關鍵字(英)

★ thermal analysis
★ Heat Sink

論文目次

摘要 ....................................................... 2
ABSTRACT ..................................................... 3
誌謝 ....................................................... 5
目錄 ....................................................... 6
圖目錄 ....................................................... 8
表目錄 ...................................................... 11
第一章緒論 .................................................. 1
1-1 研究動機與目的 ......................................................................................... 1
1-2 文獻回顧 ..................................................................................................... 3
第二章研究方法 ............................................. 16
2-1 數值方法 .............................................. 16
2-2 研究流程 .............................................. 17
2-3 物理模型 .............................................. 18
2-4 模擬條件 .............................................. 20
2-3 網格獨立性 ............................................ 27
第三章模擬結果與討論 ....................................... 29
3-1 散熱片幾何討論 ........................................ 29
3-2 鰭片傾斜角度討論 ...................................... 36
3-2.1 前置傾角 ......................................... 36
3-2.2 中置傾角 ......................................... 37
3-2.3 後置傾角 ......................................... 39
第四章實驗設備與方法 ....................................... 42
4-1 實驗規劃 .............................................. 42
4-2 實驗設備 .............................................. 43
4-3 實驗步驟 .............................................. 47
第五章結果與討論 ........................................... 51
5-1 實驗結果 ............................................... 51
5-2 模擬與實驗結果比較 .................................... 54
5-3 結論 .................................................. 55
第六章參考文獻 ............................................. 56

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指導教授

曾重仁(Chung-jen Tseng)

審核日期

2024-7-30

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