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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/94478


    Title: 封閉迴路式震盪熱管之單向穩態循環流研究
    Other Titles: Study on single direction circulation flow in closed-loop pulsating heat pipe
    Authors: 蕭百鈞;Hsiao, Pai-Chun
    Contributors: 淡江大學機械與機電工程學系碩士班
    康尚文
    Keywords: 震盪式熱管;循環流;循環方向;lsating Heat Pipe;Circulation Flow;Circulation Direction
    Date: 2013
    Issue Date: 2014-01-23 14:41:27 (UTC+8)
    Abstract: 本研究是利用外徑6mm、內徑3 mm 之玻璃管製作的9 個折彎
    數、總長1980mm 之震盪式熱管。為了使震盪式熱管達到循環狀態,
    本實驗在蒸發端採用單邊加熱及雙邊加熱的方式進行實驗,並使用水
    冷系統為冷凝器將溫度控制在25°C。在兩種不同的加熱方式下、及
    不同輸入功率(20W、60W、100W、140W)下,計算出熱阻值進行比
    較。並利用數位攝影機拍攝影片,觀測乙醇在震盪式熱管中流動的情
    形。
    觀察實驗結果可以發現,當加熱瓦數到達100W 時,震盪式熱管
    開始出現循環流,雙邊加熱在循環流中會出現局部的逆流,甚至是發
    生震盪進而停止循環的情況,而單邊加熱可以在較低的輸入功率下產
    生穩定的單方向循環流,使得熱阻值降低。
    This research utilized 6 mm outer diameter and 3 mm inner diameter glass tubes to
    manufacture 9 turns Closed-Loop Pulsating Heat Pipe (CLPHP) with a total length of
    1980mm. For achieving the loop circulation, heaters were installed unilaterally and bilaterally
    in the evaporator respectively, and a water cooling system kept at 25°C was used as the
    condenser. The experiment was conducted under both heating methods to compare the
    thermal resistance at an input power of 20W, 60W, 100W and 140W. Through a digital video
    camera, the visualization experiment was carried out to observe the ethanol fluid flow in the
    PHP.
    From the observation, when the input power is greater than 100W, circulation in the
    working fluid occurs. Randomness direction of circulation and local oscillation can be found
    in the bilateral heating. Unilateral heating may allow the consistent direction circulation
    happened at lower input power to perform lower thermal resistance.
    Appears in Collections:[機械與機電工程學系暨研究所] 學位論文

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