trends in data center energy efficiency...airflow management - containment •twm fosro – hacs...

ENERGY OPTIMIZATION SPECIALISTS

©2012 Leading Edge Design Group. All Rights Reserved. 1


©2012 Leading Edge Design Group. All Rights Reserved.

Trends in Data Center Energy Efficiency

Presented by:Todd Boucher

Better Building by Design 2012



Efficiency Vermont is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES).

Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA

members and non-AIA members are available upon request.

This program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed

or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using,

distributing, or dealing in any material or product.

Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.



Learning Objectives• Understand the current state of data center energy

usage• Discuss metrics for measuring efficiency in your data

center• Discuss and understand trends in data center energy

efficiency• Review feasibility of implementing efficiency

improvements in your data center



Course EvaluationsIn order to maintain high-quality learning experiences, please access

the evaluation for this course by logging into CES Discovery and clicking on the Course Evaluation link on the left side of the page.



Agenda• Efficiency Defined• What has changed?• State of the data center• Trends in data center energy efficiency• What is feasible?• Q&A



What Changed? 2010 - 2012

• 2010 Presentation– Public Law 109-431 just released

• Since Then?– Awareness

• Efficiency, DCIM rise in priority• Benchmarking & Use of Metrics• Collaboration

– Demand strong• 50% of DC Managers adding capacity in 2012• Over 70% DC Managers interested in Efficiency/DCIM



State of the Data Center

• Energy = 40%+ of cost for Enterprise IT teams• Increased Collaboration

– PUE (Power Usage Effectiveness)– Certifications

• Users Driving Scale– “The cloud”– Users demand availability– Vertical, not just horizontal, Scale



Vertical Scale?

Xbox Cray Supercomputer



Data Center Energy Efficiency Trends

• Expanded envelope• Airflow Management – Containment• In Row Cooling• Free Cooling• High Voltage Distribution• DCIM



Expanded Envelope

2004 Low End Temperature 20°C (68°F)High End Temperature 25°C (77°F)Low End Moisture 40% RHHigh End Moisture 55% RH

200818°C (64.4°F)27°C (80.6°F)

5.5°C DP (41.9°F DP)60% RH & 15°C DP

(59°F DP)



Expanded Envelope



Expanded Envelope

• Most DC Today = 68°- 72°• 1degF increase = 3% energy savings• Temp Sensor locations• What are we trying to cool?• How to implement



Airflow Management – Quick Review

• How Does IT Equipment move air?• Problems

– Air Mixing, Exhaust Air Recirculation



Airflow Management - Containment

• Two Forms– HACS “Hot Aisle Containment System”– CACS “Cold Aisle Containment System”

• Application specific • Several Strategies for each

– Curtains– Chimneys– Manufactured “out of the box”– Custom



Hot Aisle Containment System



Cold Aisle Containment System



What is Best?

• Application Specific– No universal solution

• CACS in Retrofit Applications– Downflow CRAC/CRAH w Open Return

• HACS in New Construction– Slab on grade– In row cooling– “High Density” areas

• 5% - 10% savings, 2 year ROI



In Row Cooling

• History• Shorten Supply/Return Airflow paths• Better Redundancy



In Row Cooling



Economization – “Free Cooling”

• What is it• Two Forms

– Air Side Economizer (“direct”)– Water Side Economizer (“indirect”)

• Can we use it?



Water Side Economizer

• Use outside air to cool water supplied to chiller• Best Conditions:

– WB temp 55degF or less for 3,000 hrs/yr– Existing chilled water plant– New CW builds

• Chiller Plant Savings– 70% when operating in economizer mode



Water Side Economizer



Air Side Economizer• Supply Outside Air directly to IT Equipment• Location is critical to maximize savings



How does it work?



Air Side Economizer

• Important Considerations– Space – Flexibility of operating conditions in data center– Redundancy– Monitoring– Cost

• Best for new construction• Savings

– 30% minimum over traditional data center



High Voltage Distribution

• Historical Approach – Power Distribution



High Voltage Distribution

• Power Supply Configuration– “auto sensing” 100v-240v



High Voltage Distribution – What do we get?

• Increased Available Power• Example 20A Circuit – 92% increase in available

power at 240V vs traditional• Approx 20% less weight/space• Reduced wire size• Considerations

– Difficult to retrofit– Highly recommended for new construction



Order of Priority

Have a plan!• DCIM• Airflow Management• Expanded Envelope• Cooling Infrastructure/Strategy• Power Distribution



EVT Participation• EVT is supporting cost effective energy efficiency improvements in a

data center through technical assistance and if appropriate financial incentives. These measures could include server or PC power management, storage optimization, and cooling and ventilation controls and equipment.

• Interested customers should contact Efficiency Vermont to discuss their ideas. If the customer doesn’t already have a contact at Efficiency Vermont they should call our Project Intake Coordinator, Lynn Banach, at [email protected], or 1-888-921-5990, ext. 7427

trends in data center energy efficiency...airflow management - containment •twm fosro – hacs...

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