[san-tech][02992] ASHRAE：サーバ稼働奨励温度範囲を拡大へ

Date: Tue, 01 Mar 2011 20:52:33 +0900
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2012/03/25
[san-tech][03488] Slide: Green Grid Forum 2012 (March 6-7, 2012) & Free Cooling Map Update
2011/09/19
[san-tech][03377] デル、最高45℃での使用も保証で外気冷却を支援、　
2011/06/09
[san-tech][03104] ASHRAE Whitepaper - 2011 Thermal Guidelines公開
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近く ASHRAE (American Society of Heating, Refrigerating and
Air-Conditioning Engineers, Inc.) から発行される

"Thermal Guidelines for Data Processing Environments", 3rd Edition

で、昨今の技術動向をくみとり、サーバー稼働奨励温度範囲が拡大される
ようです：
"ASHRAE Works to Expand Datacom Environmental Classes"
 February 17, 2011
  http://www.ashrae.org/pressroom/detail/2011-02-17

  "ASHRAE continues to widen the temperature and humidity ranges for
   servers through a soon-to-be-published third edition of the datacom
   book, "Thermal Guidelines for Data Processing Environments.""


現状は 2008年版 (2nd Edition) です：
"2008 ASHRAE Environmental Guidelines for Datacom Equipment
 -Expanding the Recommended Environmental Envelope-"
  http://tc99.ashraetcs.org/documents/ASHRAE_Extended_Environmental_Envelope_Final_Aug_1_2008.pdf
例えば
  Low End Temperature : 20C (2004 Version) => 18C (2008 Version)
  High End Temperature: 25C (2004 Version) => 27C (2008 Version)

残念ながら 3rd Editionの発行日も確定してないようで、具体的な温度範囲は
未だ公開されてません。

関連記事
"ASHRAE: Data Centers Can be Even Warmer"
 February 22nd, 2011
  http://www.datacenterknowledge.com/archives/2011/02/22/ashrae-data-centers-can-be-even-warmer/
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2011/06/25

"サーバールームの室温を2度上げると20％の節電効果、日本マイクロソフト
 が検証"
 2011/6/24. クラウド Watch
  http://cloud.watch.impress.co.jp/docs/news/20110624_455379.html
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2011/06/26

Facebookの場合、
"Reflections on the Open Compute Summit"
 2011年6月22日, Yael Maguire, Facebook Engineering Note
   https://www.facebook.com/note.php?note_id=10150210054588920

Building the Next Open Compute Data Center in North Carolina
  "Our teams have learned a number of things over the past few months
   of operation, which have led to changes in our second phase of Prineville
   as well as our new data center in Forest City, North Carolina. Comparing
   our first phase of Prineville with how we plan to operate Forest City,
   we've raised the inlet temperature for each server from 80°F to 85°,
   65% relative humidity to 90%, and a 25°F ΔT to 35°. This will further
   reduce our environmental impact and allow us to have 45% less air handling
   hardware than we have in Prineville."

80F = 26.7C
85F = 29.4C (inlet, Cold Aisle)
85 + 35 = 120F = 48.9C (Hot Aisle)

Facebook Engineering Note
   https://www.facebook.com/notes.php?id=9445547199


解説記事：
"Facebook: 85 Degrees in the 'Cold' Aisle"
 June 23rd, 2011, Data Center Knowledge
  http://www.datacenterknowledge.com/archives/2011/06/23/facebook-85-degrees-in-the-cold-aisle/