臺灣博碩士論文加值系統

近年來雲端計算(Cloud Computing)應用規模增加，網路資料中心(Internet Data Center, IDC)機房，因此需要更多的空間來存放資訊(Information Technology, IT)設備，在機滿為患的機房中為了降低伺服器溫度，普遍將冷卻溫度越調越低以維持系統運作的情況下，隨著應用能源的增加，成本提高和環保問題的挑戰，因此資料中心的散熱最佳安排是重要的課題之一。
本研究經由數值模擬的方法，來分析貨櫃型資料中心(Container Data Center)之散熱性能，藉由改變冷風口及回風口的風量、機櫃位置安排和冷熱通道間的隔離，探討在不同的參數組合下，對內部流場的溫度、速度變化。再根據其模擬的結果來改善熱點和散熱不均勻現象，提出不同技術來找出機櫃之最佳冷卻效果，用以作為未來架設資料中心的參考依據。

In recent years the gigantic rise of IT (Information Technology) applications result in tremendous demand of internet data center. With increasing use of energy, higher cost and concerns of environmental issues, new challenges prevail for data centers. Therefore, effective thermal management of the data center becomes an imperative topic.
In this study, we use numerical simulation to analyze the thermal performance of a container data center. A parametric study by changing the air inlet, outlet of the position, velocity, cold aisle, and hot aisle is conducted. Some detailed discussion of container data center in different combinations of parameters are presented in this study. Based on simulation results, some methods are devised to provide a better uniformity of the air flow within the data center.

目 錄
書名頁 I
碩士論文 II
口試委員審定書 III
中文摘要 IV
英文摘要 V
誌謝 VI
表目錄 X
圖目錄 XI
第一章、緒論 1
1.1前言 1
1.2資料中心發展趨勢 2
1.3貨櫃型資料中心 5
1.4資料中心規範 7
1.5文獻回顧 11
1.6軟體介紹6sigmaRoom 15
第二章、數值方法 16
2.1統御方程式 16
2.2紊流模型 17
2.3雷諾數 20
第三章、資料中心模擬介紹 21
3.1模型尺寸與參數設定 21
3.1.1模型幾何尺寸 21
3.1.2模擬參數設定 22
3.1.3風量計算 24
3.2機房模型設計 25
3.2.1 Top-Down 設計 25
3.2.2 Bottom-up 設計 26
3.2.3回風設計 26
3.2.4冷卻系統設計 27
3.3模擬架構 27
3.3.1機房8個機櫃、4個冷風口 28
3.3.2機房16個機櫃、8個冷風口 31
3.3.3格點測試結果 33
第四章、機房模擬分析 35
4.1模擬之溫度擷取 35
4.2比較只移動機櫃及一起移動機櫃與冷風口之溫度 36
4.2.1 X=0.95, 790cfm, 24kW 36
4.2.2 X=1.55, 790cfm, 24kW 39
4.2.3 X=2.15, 790cfm, 24kW 42
4.2.4 X=2.75, 790cfm, 24kW 44
4.2.5 X=3.35, 790cfm, 24kW 46
4.3比較只移動機櫃及紙移動冷風口之散熱性能 47
4.4比較A、B、C設計之散熱性能 48
4.5機房16機櫃、8冷風口之散熱性能分析 50
4.5.1比較自然的回風天花板出風與地板出風差異 50
4.5.2冷通道封閉 53
4.5.3冷通道改善 57
第五章、結論與未來改進方向 61
5.1結論 61
5.2未來改進方向 62
參考文獻 63

[1]Internet Live Stats/ Number of Internet Users, 2014
http://www.internetlivestats.com/internet-users/
[2]International Telecommunication Union (ITU), ‘‘The World in 2014: ICT Facts and Figures’’, June 20 2014, pp.1-5.
[3] ASHRAE, “Data com Equipment Power Trends and Applications”, 2005.
[4]王啟川，「資料中心冷卻技術」，2012年，第4-8頁。
[5]IDC Report of data center cost structure and trend.
[6]Timothy Prickett Morgan. (December7, 2009).IBM Crams Data Centers Into Shipping Containers, Too.IT Jungle/ Newsletter, volume18, Number43-December7, 2009.
[7]IDC, Internet Data Center life cycle.
http://www.idc.com/
[8]HP, HP Performance Optimised Data center (POD) News.
http://www8.hp.com/us/en/hp-news/newsroom.html
[9]Data source: Creating Energy-Efficient Data Centers, U.S. Department of Energy, Data Center Facilities and Engineering Conference, May 18, 2007.
[10]ASHRAE TC 9.9 “Thermal Guidelines for Data Processing Environments– Expanded Data Center Classes and Usage Guidance” 2011, Whitepaper prepared by ASHRAE Technical Committee (TC) 9.9 Mission Critical Facilities, Technology Spaces, and Electronic Equipment.
[11]Sullivan RF. Alternating cold and hot aisles provides more reliable cooling for server farms. White Paper, The Uptime Institute, Inc., Santa Fe, NM USA.
[12]Nagarathinam Srinarayana, Babak Fakhim, Masud Behnia & Steven W. Armfield, Thermal Performance of an Air-cooled data Center With Raised-Floor and Non-Raised-Floor Configurations, Heat Transfer Engineering, 2014, pp.384-397.
[13]Van Gilder, J., Schmidt, R., “Airflow Uniformity, Through Perforated Tiles In a Raised-Floor Data Center”, Proceedings of IPACK2005, San Francisco, CA, July 2005.
[14]Xuanhang (Simon) Zhang, Xuanhang (Simon) Zhang ; Iyengar, M. ; VanGilder, J.W. ; Schmidt, R.R. , Effect of rack modeling detail on the numerical results of a data center test cell, 2008 11th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, May 2008, pp.1183-1190.
[15]Magnus K. Herrlin, ‘‘Rack Cooling Effectiveness in Data Centers and Telecom Central Offices: The Rack Cooling Index (RCI)’’, ASHRAE 2005, pp.1-7.
[16]Christy Sujatha, D. ; Dept. of Software Eng., Periyar Maniammai Univ. (PMU), Thanjavur, India ; Abimannan, S. , Energy efficient free cooling system for data centers , 2011 Third IEEE International Conference on Coud Computing Technology and Science