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研究生:莊鈵宏
研究生(外文):Ping-Hung Chuang
論文名稱:資料中心創新空調設計與節能
論文名稱(外文):An Innovative Energy Saving Air-Conditioning Design for Internet Data Center
指導教授:蔡尤溪蔡尤溪引用關係
口試委員:江旭政李魁鵬
口試日期:2009-07-07
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:能源與冷凍空調工程系碩士班
學門:工程學門
學類:其他工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:64
中文關鍵詞:資料中心計算流體力學密閉式機櫃伺服器
外文關鍵詞:Internet data centercomputer fluid dynamicsclosed cabinetsservers
相關次數:
  • 被引用被引用:2
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  • 評分評分:
  • 下載下載:22
  • 收藏至我的研究室書目清單書目收藏:0
資料中心之功能為放置網路服務之伺服器,並提供冷卻與不斷電服務。各類網路服務推陳出新,必須提供更多更快的伺服器設備以使用,但也面臨到更大的伺服器散熱問題。美國研究指出資料中心佔全國耗能約1.5%,且持續增加當中。目前資料中心運轉在323~538 W/m2。在工業化趨勢上,預估未來成長朝向1613 W/m2。本研究針對密閉式機櫃的資料中心,以計算流體力學軟體(AIRPAK)建立資料中心之3D模型,並數值分析機櫃之流場與溫度。研究參數分別為:(1)高架地板高度、(2)高架地板內之纜線佈置方式、(3)增加高架地板送風口之導流板、(4)增加機櫃出風口之回風管。根據模擬結果發現提高地板高度與增加導流板將可以降低冷空氣送風不均、纜線的佈置應該離開送風口,可以使機櫃內壓力較穩定。相同的資料中心送風量,改用新型設計可降低機櫃產生熱點的現象,並達到機櫃冷卻較平均之效能與增加資料中心機櫃散熱量25%。
Internet data centers (IDC) function as managing centers for internet servers, with server cooling and uninterruptible power supply systems. New constant demands for internet services require ever larger heat dissipation for data servers. Some US studies pointed out that data centers’ energy consumption accounts for about 1.5% of the total power consumption, and still in the increase. Data centers normally operate at 323~ 538 W/m2 of power density. The trend of development anticipates the power density will grow to 11613 W/m2.
This study focuses on the closed cabinet type of data canter. 3D numerical models of data centers were built using a computational fluid dynamics program, AIRPAK. Numerical analysis of the temperature and the flow distribution of a data center were conducted. The parameters studied were: (1) height of the raised floor, (2) the arrangements of obstructions under the raised floor, (3) diffusers of various angles of the air outlets under the raised floor, (4) the air return on top of the cabinets. The research results show that the air supplied to the cabinets would be more uniform by increasing the height of the raised floor, and using diffusers at the air supply. The room temperature would be lower by using air return on top of the cabinets. At the same cool air volume in the data center, new air condition design can reduce the hot spots in the data centers. The research results can be used to establish standards for energy consume for new data centers in the future.
摘 要 i
ABSTRACT ii
誌 謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 文獻回顧與探討 3
1.3 研究方法與目的 10
第二章 數値模擬分析方法 11
2.1 統御方程式 11
2.2 數値方法 13
2.2.1 對流–擴散方程式的差分形式 13
2.2.2 速度-壓力耦合方程式 14
2.3 鬆弛因子離散方式 16
2.4 電腦模擬軟體介紹 17
2.4.1 模擬軟體使用步驟 17
2.4.2 應用 18
第三章 資料中心之模型 20
3.1 資料中心之電腦3D模型 20
3.2 起始條件與邊界設定 21
3.3 網格獨立分析 22
第四章 資料中心之空調設計模型 23
4.1 影響資料中心性能之參數 23
4.2 資料中心內高架地板高度分析 24
4.2.1 Case(1)高架地板高度為50 cm 27
4.2.2 Case(2)高架地板高度為70 cm 29
4.2.3 Case(3)高架地板高度為90 cm 31
4.2.4 Case(4)高架地板高度為110 cm 33
4.2.5 改變資料中心高架地板高度之結果討論 35
4.3高架地板空間內纜線佈置分析 37
4.3.1 纜線在送風口前之空調影響分析 39
4.3.2 高架地板內纜線佈置分析之結果討論 42
4.4 增設地板下出風口導流板之分析 44
4.4.1 增設地板下出風口導流板之模擬結果 47
4.4.2 增設地板下出風口導流板之結果討論 51
4.5 增設伺服器機櫃出風口之回風管 53
4.5.1 增設伺服器機櫃出風口回風管之模擬結果 54
4.5.2 增加伺服器機櫃出風口回風管之結果討論 56
4.6 創新空調設計之節能效益評估 57
第五章 結論 60
參考文獻 61
符號彙編 63
[1] C. Kurkjian, J. Glass, "Air-Conditioning Design for Data Centers Accommodating Current Loads and Planning for the Future, " ASHRAE Transactions, vol. 111, part 2, 2005, pp. 715-724.
[2] R. Schmidt, D. Beaty, M. Lyengar, S. Shrivastava, "Thermal Profile of a High-Density Data Center: Hot Spot Heat Fluxes of 512 W/ft2, " ASHARE Transaction, vol. 111, part 2, 2005, pp. 765-777.
[3] V. Sorell, S. Escalante, J Yang, "Comparison of Overhead Underfloor Air Delivery Systems in a Data Center Environment Using CFD Modeling, " ASHARE Transaction, vol. 111, part 2, 2005, pp. 756-764.
[4] V. Sorell, V. Gandhi, Y Abougabal, A. Watve, K. Khankari, "An Analysis of the Effects of Ceiling Height on Air Distribution on Data Centers, " ASHARE Transaction, vol. 112, part 1, 2006, pp. 623-631,.
[5] K. Herrlin, "Rack Cooling Effectiveness in Data Centers and Telecom Central Offices: The Rack Cooling Index(RCI), " ASHARE Transaction, vol. 111, 2005 pp. 725-732,.
[6] H.S. Sun, S.E. Lee, "Case study of data centers’ energy performance," Energy and Building; vol. 38, no. 5, 2006, pp. 522-533.
[7] J.F. Karlsson, B. Moshfegh, "Investigation of indoor climate and power usage in a data center, " Energy and Buildings; vol. 37, no. 10, 2005, pp. 1075-1083.
[8] K.C. Karki, S.V. Patankar, "Airflow distribution through perforated tiles in raised-floor data centers," Building and Environment, vol. 41, no. 6 , 2006, pp. 734-744.
[9] R.R. Schmidt, "Best Practices for Data Center Thermal and Energy Management-Review of Literature," ASHARE Transaction, vol. 113; part 1, 2007, pp. 206-218,.
[10] ASHARE Environment Guidelines for Datacom Equipment , 2008.
[11] V.Sorell, "OA Economizers For Data Centers, ASHARE Journal, " vol. 49, no. 12, 2007, pp. 32-37.
[12] The Uptime Institute. High Density Computing: The path Forward, 2006, p.2 www.sandc.com/edocs_pdfs/EDOC_046758.pdf .
[13] R. Schmidt, D. Beaty, J. Dietrich, "Increasing Energy Efficiency In Data Centers," ASHARE Journal, vol. 49, no. 12, 2007, pp. 18-24.
[14] AIRPAK 3.0 User’s Guide, FLUENT Inc , 2007.
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