English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 56418/90255 (63%)
造訪人次 : 11695009      線上人數 : 30
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/74645


    題名: 閉迴路震盪式熱管流動模式之實驗探討
    其他題名: Experimental studies of flow patterns in closed loop pulsating heat pipes
    作者: 洪啟翔;Shiang, Hung-Chi
    貢獻者: 淡江大學機械與機電工程學系碩士班
    康尚文
    關鍵詞: 震盪式熱管;流動模式;Pulsating Heat Pipe;Flow Pattern
    日期: 2011
    上傳時間: 2011-12-28 19:10:12 (UTC+8)
    摘要: 閉迴路震盪式熱管雖具有非常好的散熱效果,但熱傳原理複雜。為了更進一步了解其性質,本實驗以外徑6mm、內徑3 mm 之玻璃管製作9 個折彎總長1980mm 之震盪式熱管,為了使震盪式熱管更容易達到循環,故製作水冷系統並控制溫度在25℃,工作流體使用甲醇。在不同加熱功率 30、60、90、120、150、180W 參數下紀錄溫度和評估熱阻值。利用數位攝影機拍攝影片,分析記錄震盪式熱管內流體作動情形。管內流動模式可分為順轉、逆轉或震盪,由實驗發現,管內流動方向改變與管之溫度有明顯的關係。實驗結果顯示在輸入功率為180W 時,有最低的熱阻值為0.217(K/W)。
    A Closed Loop Pulsating Heat Pipe (CLPHP) is a complex heat transfer device with a strong thermo-hydrodynamic coupling governing its thermal performance. This research utilized 6 mm outer diameter and 3 mm inner diameter glass tubes to manufacture 9 turns closed loop Pulsating Heat Pipe(PHP) with a total length of 1980mm. For achieving the loop circulation easily, a water cooling system kept at 25 ℃ was used as the condenser, and used methanol as working fluid. Experiment was conducted to measure temperature difference and to evaluate the thermal resistance under at a series change of power inputs (30W, 60W, 90W, 120W, 150W, 180W). A digital video camera was used to record the working situation of the working fluid inside the channel. The flow pattern can be categorized into clockwise, counter-clockwise and transition status. The results showed the flow direction of PHP was changed with the temperature difference of tubes. The lowest resistance is 0.217(K/W) at an input power of 180W in this study.
    顯示於類別:[機械與機電工程學系暨研究所] 學位論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    index.html0KbHTML158檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋