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Copyright 2005 ANCIS Inc. 1
Introduction to Conference onCutting Edge Data Center
Cooling SolutionsMagnus K. Herrlin, Ph.D.
PrincipalANCIS [email protected]
www.ancis.us
ANCISI N C O R P O R A T E D
Copyright 2005 ANCIS Inc. 2
The Next 30 Minutes±
• Some Selected Thoughts About Data Center/Telecom Cooling
• Introduction of Today’s Speakers
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Submarines in the Cold War
Photo of a submarine maneuvering room console, Smithsonian Institution, 2000 “Submarines in the Cold War.”
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Predicting the Future…
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Equipment Power Trends
• Power forecasting up to 2014• Key aspects of facility planning• Glossary of common terms
Release Date: 02/09/2005www.ashrae.org
• Environmental Specifications• Temp/hum Measurements• Equipment Placement• Airflow Patterns• Equipment Reporting
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Hot, Hot, Hot… Maybe Not
0.00
0.20
0.40
0.60
0.80
1.00
0 20 40 60 80 100
Computer room UPS power (Watts/square foot)
Frac
tion
of to
tal f
loor
are
a in
sam
ple
19992000
2001
Number of facilities Total floor area
Computer room power density
Million square feet W/square foot1999 35 1.55 22.92000 38 1.72 22.42001 48 1.86 25.3
Source: Uptime Institute, 2002.
Source: The Uptime Institute, Inc. 2002
Based on data from120 Data Centers
33%
97%
Average Heat Load ~25 W/sq.ft.
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… but Overheating
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Problems, here?
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0
5000
10000
15000
20000
25000
30000
35000
40000
Air Liquid
Type of Cooling
Wat
t per
Rac
k
Air vs. Liquid…Estimates 1987
Source: Bell Communications Research 1987
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… a Moving Target
0
5000
10000
15000
20000
25000
30000
35000
40000
Air Liquid
Type of Cooling
Wat
t per
Rac
k
2005
?
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Four Challenges
1. Temporal Temperature Gradients(in case of cooling outage)
2. Sensitivity to Right Design Point(how is performance impacted)
3. Rack Cooling Effectiveness(how well is the equipment cooled)
4. Staff Training(need to understand systems)
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1. Temporal Gradients
80°°°°C/hr !! @ 50 W/SqFtASHRAE max: 5°C/hrNEBS max: 30°C/hr
Data Center
Loss of Cooling
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2. Sensitivity to Right Design Point
Recirculation due todrift from design point
for tile airflow
Elevated intaketemperature
Abrupt interfacebetween hot and
cold air
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3. Rack Cooling Effectiveness
Max Allowable
Rack IntakeTemperature
Max Recommended
N
Min Recommended
Min Allowable
TotalOver-Temp
TotalUnder-Temp
Rack Intake #
The Rack Cooling Index (RCI) is a measureof the absence of over- and under-temperatures
(to be published at ASHRAE June 2005)ANCIS
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4. Staff TrainingScenario:• Major telecom installation• False smoke alarm• Automatic shut-down of cooling• Rapid temperature increase• Loss of 400,000 phone/data lines• Staff tried to lower temperature• Deployed additional “cooling”
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#@!#&
!
Installation & Operations Manual for deployed cooler…
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Example: Liebert XDV
Virginia Tech Supercomputer,Ultimate Load 400 W/SF
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Example: Liebert XDF
Self-Contained, Water Cooled orRemote Condenser Unit
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Today’s Presenters
• PG&E Emerging Technologies Demonstration Update• APC Infrastruxure Power and Cooling of Ultra-High Density Servers• Knürr Integrated Heat Exchanger Rack Systems• WrightLine Cool, Power, Manage, & Secure your Data Center• SprayCool Evaporative Cooling Applications for Data Centers• LBNL Technology Demonstration Programs
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Copyright 2005 ANCIS Inc. 20
Thank You !
ANCISI N C O R P O R A T E D
Magnus K. Herrlin, Ph.D.Principal
ANCIS [email protected]
www.ancis.us
