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研究生:徐仁威
研究生(外文):Hsu, Jen-Wei
論文名稱:蒸發式冷卻應用於雲端機房節能之研究
論文名稱(外文):Evaporative Cooling Applied to Energy Saving in Data Center
指導教授:劉耀先
指導教授(外文):Liu, Yao-Hsien
口試委員:劉耀先王啟川楊愷祥
口試委員(外文):Liu, Yao-HsienWang, Chi-ChuanYao, Kai-Shing
口試日期:2018-08-08
學位類別:碩士
校院名稱:國立交通大學
系所名稱:機械工程系所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:107
語文別:中文
論文頁數:55
中文關鍵詞:蒸發式冷卻噴霧方向液氣比
外文關鍵詞:Evaporative coolingSpray directionLiquid to air ratio
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本研究探討在不同的液氣比、空氣溫度和噴霧方向,利用全域式液滴粒徑速度儀系統(Global Sizing Velocimetry, GSV)量測液滴大小,計算出蒸發式冷卻效率。實驗中使用雷諾數16000、32000、48000的氣流;液氣比範圍為4×〖10〗^(-5)、8×〖10〗^(-5)、1.2×〖10〗^(-4);入口空氣溫度為40˚C~60˚C;而噴霧採用不同的噴灑方向,垂直於氣流和平行於氣流。結果顯示,當液氣比越高、增加空氣溫度和垂直於氣流之噴霧,蒸發冷卻效率會較其他來的好。所以當噴霧方向為垂直,液氣比為1.2×〖10〗^(-4)、入口空氣溫度為60˚C時,擁有最高的效率,相較於平行方向噴霧的效率高約3~23%。
In this study, we focus on effects of different liquid-gas ratios, air temperatures and spray directions on the evaporative cooling efficiency and the droplet size is measured by the global sizing velocimetry. In our experiment, the air Reynolds numbers are 16000, 32000, and 48000. The liquid-gas ratios are 4×〖10〗^(-5), 8×〖10〗^(-5), and 1.2×〖10〗^(-4). The inlet air temperature ranges from 40˚C to 60˚C and the directions of spray are vertical and parallel to the mainstream flow. The results show the higher liquid-gas ratio and air temperature produced much better evaporative cooling efficiency for the sprays vertical to the mainstream flow. When the spray is vertical to the air flow, the highest evaporative cooling efficiency is achieved and the efficiency is 3~23% higher than the spray direction parallel to the mainstream flow.
摘要 I
Abstract II
誌謝 III
目錄 IV
圖目錄 VI
表目錄 X
符號表 XI
第一章 緒論 1
1-1 前言 1
1-2 文獻回顧 2
1-3 實驗目的 6
第二章 實驗設備與數據量測 7
2-1 腔體 7
2-2 噴霧系統 8
2-3 測試區 8
2-4 熱線測速儀 8
2-5 三軸位移平台 9
2-6 全域式液滴粒徑速度儀 9
2-6-1 全域式液滴粒徑速度儀設備 10
第三章 基礎理論 11
3-1蒸發式冷卻效率 11
3-2能量守恆 12
3-3 全域式液滴粒徑速度儀工作原理與影像分析 13
3-3-1 液滴粒徑 13
3-4不準度分析 15
第四章 結果與討論 16
4-1實驗結果 16
4-1-1入口空氣溫度影響 16
4-1-2液氣比影響 18
4-1-3噴霧方向影響 19
第五章 結論 21
5-1 結論 21
5-2 未來建議 22
參考文獻 23
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