電力機房目前大多使用冷氣冷卻，但現今電力成本及節能意識上升，這種作法不僅浪費能源又耗費大量金錢，因此熱源的集中管理也是相當重要。但使用傳統熱管所費不貲，需搭配散熱鰭片以及製程複雜等等問題之外，單根熱管頂多能處理30W的熱量，若要對變壓器這類千瓦等級的機房設備，需要幾百根的熱管，導致構造極大及成本等問題，並非是最佳解決之道。脈衝式熱管(PHP)則對於上述問題的提供一嶄新概念，其輕薄易彎折的特性，可以輕鬆帶走數百瓦之熱量，但其物理機制極為複雜，因此還在實驗階段，尚未有已開發成熟之產品，因此本論文之目的為開發一實用之PHP工業用散熱器供給油浸式變電箱使用。
本論文實驗分為三個部份，第一部分是依照變電箱規格設計出400x1400x3mm3尺寸之超大型工業用PHP散熱器，並測試此規格PHP在不同填充物質之下的單片移熱能力，設計一最大熱傳量實驗。實驗的結果驗證R134a在50%填充率可帶走1100W。第二部分則是將驗證成功之超大型PHP置入於模擬油浸式變電箱，分別放入四片及八片PHP後，利用風管冷卻冷凝部進行實驗。實驗結果控制油溫在60℃時，四片PHP可以帶走2420W，八片可以帶走3080W，已可以充分應付一般大樓的變電箱需求。第三部分則是在確認八片可以帶走3080W且油溫在65℃後，進行散熱機構的改良，針對添加鰭片、對冷凝部噴霧及風扇風道改良等等改善方法，實驗發現最佳的改良方法為添加鰭片，可以使八片在3080W時油溫控制在55℃。

Nowadays, rising of electricity cost and energy-saving awareness, centralized management of heat is more important than traditional air conditioning cooling in Electrical room. Conventional heat pipe is often used to move the heat and cool it by Fan, but a conventional heat pipe can only remove 30W of heat. If we need to remove kilowatt of heat from transformer box and other power equipment, it need a lot of heat pipe to deal with it. So using the conventional heat pipe is not the best solution because its cost and huge size with heat sink for heat dissipation. Pulsating heat pipe (PHP) provides a new concept for this problem. PHP can easily take away hundreds of watts of heat and its wick-less structure which makes its construction easier and cheaper.
This study is to develop industrial PHP for oil immersed transformer and divide into three parts. First part is test max heat transfer rate with one piece of PHP. Result of first part shows maximum heat transfer rate of R134a with fill ratio 50% is about 1100W. Second part is test of four pieces and eight pieces of PHP insert into simulated transformer box. Result of second part shows four pieces of PHP can remove 2420W and eight pieces of PHP can remove 3080W with the oil temperature control in 60℃. Final part is the improvement of the PHP. Result of final part shows add fins into condensation section and evaporation section can lower the 18℃ of oil temperature with eight pieces of PHP insert into simulated transformer box.

摘要 i
Abstract ii
致謝 iii
目錄 iv
表目錄 vi
圖目錄 viii
符號表 xi
第一章 緒論 1
1.1研究背景與動機 1
1.2傳統熱管 3
1.3電力機房空調系統節能研究及改善 5
1.4油浸式變電箱 9
1.5研究方法及流程 12
第二章 脈衝式熱管技術 13
2.1脈衝式熱管之技術簡介 13
2.2文獻回顧 15
2.3脈衝式熱管影響因子 19
2.3.1管材 19
2.3.2管徑 19
2.3.3工作流體 20
2.3.4填充率 20
2.3.5彎道數目與傾斜角度 20
2.4彎管設備與填充方式 21
第三章 脈衝式熱管之最大熱傳量 24
3.1最大熱傳量 24
3.2實驗設備 26
3.3工作流體選擇 29
3.4實驗步驟 31
3.5實驗結果 32
第四章(I) 實驗裝置、步驟與結果 35
4.I.1箱體設計 35
4.I.2絕緣油 37
4.I.3風道散熱系統設計與架設 39
4.I.4四片實驗架設與結果 42
4.I.5八片實驗架設與結果 47
第四章(II) 脈衝式熱管之改良實驗 51
4.II.1諸論 51
4.II.2填充率改良 51
4.II.3風道與風扇改良 52
4.II.4霧化器改良 58
4.II.5蒸發部長度改良 60
4.II.6鰭片改良 61
4.II.7改良實驗總結 66
第五章 結論 67
參考文獻 68

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