資料中心創新空調設計與節能

An Innovative Energy Saving Air-Conditioning Design for Internet Data Center

莊鈵宏(Ping-Hung Chuang)

指導教授 ： 蔡尤溪

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2009年)

摘要

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%。

關鍵字

資料中心 ； 計算流體力學 ； 密閉式機櫃 ； 伺服器

並列摘要

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.

並列關鍵字

Internet data center ； computer fluid dynamics ； closed cabinets ； servers

參考文獻

[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.

[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.

[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.