平板迴路式熱管之傳輸管中工作流體行為之觀察

Observation on the behavior of the working fluid in the transport line of a flat loop heat pipe

易明賢(Ming-Xian Yee)

指導教授 ： 王訓忠

國立清華大學/工學院/動力機械工程學系/碩士(2006年)

摘要

我們利用了紙纖維材質作為主要的毛細結構，設計了一個可成功運作的平板式迴路熱管。它的蒸發器材質為銅，而補償室壁面和傳輸管部份則為玻璃材質。因此，當平板式迴路熱管正確運作時，我們可以觀察到工作流體在補償室及傳輸管內的流動情況。我們使用了三種不同的傳輸管，其中之一為平滑的玻璃管，其餘兩種為內壁鋪上銅網的毛細玻璃管。文內比較了不同的傳輸管對工作流體流動情況的影響，毛細玻璃管有較平穩的流況，而平滑玻璃管的流況則較為劇烈。我們亦設計了另一種結構的蒸發器，液態工作流體和蒸發器內生成的蒸汽位於毛細結構的同一邊，然而此種設計的迴路熱管無法正常啟動，文中亦討論了此種結構失敗的原因。

關鍵字

迴路熱管 ； 流況 ； 電子散熱

並列摘要

We used paper fiber as wick structure and designed a flat loop heat pipe which could operate successfully. The evaporator was made of cooper while the wall of the compensation chamber and the transport line were both made of glass. While it operated correctly, we could observe the condition of the working fluid in the compensation chamber and the transport line. We have three kinds of transport lines. One was a smooth glass tube; the others were wick glass tubes with cooper meshes inside the tube. The comparison between the different transport lines was obtained. The working fluid flowed steadier in the wick glass tube than the smooth glass tube. We also designed a different evaporator structure, but this one couldn’t operate successfully. The reason of this failure was also discussed.

並列關鍵字

loop heat pipe ； flow pattern ； electronic cooling

參考文獻

[6] Yu. F. Maydanik, “Loop Heat Pipes,” Applied Thermal Engineering 25 635-657, 2005

[8] R. R. Riehl, “Evaluation the behavior of loop heat pipe with different compensation chamber configurations”, 13th IHPC, Shanghai, China, September 21-25, 2004.

[9] R. R. Riehl, and T. C.P.A. Siqueira, “Heat transport capability and compensation chamber influence in loop heat pipes performance”, Applied Thermal Engineering 26 (2006) 1158-1168.

[10] V. G. Pastukhov, Yu. F. Maidanik, C. V. Vershinin, and M. A. Korukov, “Miniature loop heat pipes for electronics cooling”, Applied Thermal Engineering 23 (2003) 1125-1135.

[11] Yu. F. Maydanik, S. V. Vershinin, and M.A. korukov, “Miniature loop heat pipes—a promising means for cooling electronics”, 2004 Inter Society Conference on Thermal Phenomena, 60-66.