不同性能風扇對熱傳增強鰭片之性能研究｜國立中央大學博碩士論文系統

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研究生：	林立揚 LI-YANG LIN
論文名稱：	不同性能風扇對熱傳增強鰭片之性能研究
指導教授：	楊建裕 Chien-Yuh Yang
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 能源工程研究所 Graduate Institute of Energy Engineering
論文出版年：	2018
畢業學年度：	106
語文別：	中文
論文頁數：	80
中文關鍵詞：	低風速、熱傳增強、百葉窗型鰭片、斷續型鰭片、風扇
外文關鍵詞：	low air velocity, heat transfer enhancement, louver fin, offset strip fin, fan
相關次數：	點閱：12 下載：0
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本研究之目的為探討於低風速下不同風扇特性對鰭片熱傳性能
影響，以高風壓及低風壓風扇分別與帄板鰭片、斷續型鰭片及百葉窗
型鰭片進行測試。
由熱傳實驗結果得知，於低風壓風扇測試下，斷續型鰭片及百葉
窗型鰭片由於壓損所造成的流量下降，相較於對帄板鰭片之熱傳增強
效果更大，使得鰭片性能不佳；而高風壓風扇測試結果，於帄板鰭片、
斷續型鰭片及百葉窗型鰭片，因流量差異較小，使熱傳增強鰭片可表
現優於帄板鰭片的熱傳性能。
此外，風扇與鰭片需配置合適之間距，且間距對熱傳增強鰭片影
響較小；而高風壓風扇若降低其輸入功率，因其壓力損失較多，此情
況下帄板鰭片性能優於熱傳增強鰭片。

The purpose of research is to discuss the effect of different fan
characteristics on fin heat transfer performance. Using high-pressure and
low-pressure fan to do experiment with plain fin, offset strip fin and
louver fin. From the result of heat transfer, on low-pressure fan
experiment, the louver fin and offset strip fin have a lower flow rate due
to pressure loss, and the effect of the lower flow rate is much larger than
the heat transfer enhancement effect to plain fin.Therefore, the
performance of the plain fin is better than offset strip fin and louver fin
under the low wind speed fan.
With high-pressure fan experiment, heat transfer enhancement fin
have a small difference in flow rate, so that the heat transfer enhancement
fins can exhibit better heat transfer performance than plain fin.
In addition, the fan and the fin need to be properly spaced, and the
spacing has less influence on the offset strip fin and louver fin. If the
high-pressure fan reduces its input power, its pressure loss is higher. In
this case, the plain fin performance is better than the heat transfer
enhancement fin。

摘要 ............................................................................................................. i
Abstract ...................................................................................................... ii
目錄 ........................................................................................................... iii
圖目錄 ....................................................................................................... vi
表目錄 ..................................................................................................... viii
符號說明 ................................................................................................... ix
希臘字母 ..................................................................................................... x
第一章、前言............................................................................................. 1
1.1 研究背景與動機 ......................................................................... 1
1.2 研究目的 ..................................................................................... 3
第二章、文獻回顧 .................................................................................. 10
2.1 葉片長度 ................................................................................... 10
2.2 流動特性影響 ........................................................................... 11
2.3 風扇與鰭片間距離影響 ........................................................... 14
2.4 總結 ........................................................................................... 15
第三章、實驗方法 .................................................................................. 20
3.1 散熱鰭片的製作 ....................................................................... 20
3.2 風扇選用 ................................................................................... 21
3.3 風扇性能量測 ........................................................................... 22
3.3.1 差壓測量 ........................................................................ 22
3.3.2 流量測量 ........................................................................ 23
3.4 實驗系統 ................................................................................... 24
iv
3.4.1 銅棒加熱系統 ................................................................ 24
3.5 實驗量測儀器 ........................................................................... 25
3.5.1 溫度量測 ........................................................................ 25
3.5.2 資料擷取系統 ................................................................ 25
3.6 實驗步驟 ................................................................................... 26
3.7 數據換算 ................................................................................... 26
3.7.1 加熱瓦數 ........................................................................ 26
3.7.2 熱阻 ................................................................................ 27
第四章、實驗結果及討論 ...................................................................... 44
4.1 風扇特性 ................................................................................... 44
4.1.1 高、低風壓風扇性能曲線 ............................................ 44
4.1.2 風扇及鰭片工作點 ........................................................ 45
4.2 不同風扇對各類型鰭片性能 ................................................... 45
4.2.1 不同風扇對各類型鰭片熱傳性能 ................................ 45
4.2.2 不同風扇對各類型鰭片雷諾數 .................................... 46
4.2.3 風洞測試模擬不同風扇對各類型鰭片熱阻 ................ 47
4.2.4 實驗測試不同風扇對各類型鰭片熱阻 ........................ 47
4.2.5 串聯鰭片熱傳性能 ........................................................ 47
4.2.6 風扇距離對熱傳影響 .................................................... 48
4.2.7 風扇功率對風扇特性影響 ............................................ 48
第五章、結論........................................................................................... 62
參考文獻 ................................................................................................... 63
附錄、實驗誤差分析 .............................................................................. 65
實驗誤差分析的計算方法如下: ............................................................. 65
加熱量(q)誤差分析 .......................................................................... 65
熱阻值(R)誤差分析 ......................................................................... 66
                                

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