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AN

CIS

®

Room Level Energy and Thermal

AN

CIS

I N C O R P O R A T E D

Room-Level Energy and Thermal

Management in Data Centers:

Th DOE Ai M

t T

l

The DOE Air Management Tool

Presentation at IMAPS Advanced Technology Workshop on Thermal Management Palo Alto, CA, September 30, 2010

Magnus K. Herrlin, Ph.D. President ANCIS Incorporated , , p , ANCIS Incorporated mherrlin@ancis.us www.ancis.us

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Outline

Outline

‰ The Thermal Interface

‰ Air Management

‰ Environmental Requirements

‰ Sh C li

‰ Show Compliance

‰ DOE Air Management Tool

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Different Responsibilities

Different Responsibilities

Equipment Vendor

Box vs. Rack vs. Room

End User

3 Copyright (c) 2010 by ANCIS

AN

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I N C O R P O R A T E D ®

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A Typical Day in a Data Center…

A Typical Day in a Data Center…

• Always a smile • Nice hair-doNice hair do

• Fashionable high heels

• Those were the good old times!

But wait…

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The Thermal Interface

Air-cooled servers depend exclusively on the intake air

The Thermal Interface

Air cooled servers depend exclusively on the intake air temperature for effective cooling. Today, most (but not all) environmental specs refer to the intake conditions.

Equip. Rack Equipment Intake Temperatures Temperatures

AN

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I N C O R P O R A T E D ® 5 Copyright (c) 2010 by ANCIS

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Air Management

The goal of Air Management is to minimize mixing of

Air Management

The goal of Air Management is to minimize mixing of hot and cold air by minimizing air recirculation of hot air and minimizing by-pass of cold air. Both measures

result in energy savings and better thermal conditions result in energy savings and better thermal conditions.

Next-to-perfect Next to perfect Air Management with enclosed cold aisle 100°F cold aisle 75°F

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Once-Through Cooling

“Once-through cooling” is key to air management. It

Once Through Cooling

g g y g

means that each cold air “cluster” passes through the server equipment exactly one time.

2x = Recirculation air Equip. Rack 1x = Once-through 1x = Once-through 0x = By-pass air

AN

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I N C O R P O R A T E D ® 7 Copyright (c) 2010 by ANCIS

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Air Management Measures

• Place cold-air supplies in front aisles to conserve hot

Air Management Measures

Place cold air supplies in front aisles to conserve hot and cold aisles

Install blanking panels in empty server positions in the • Install blanking panels in empty server positions in the equipment racks

• Install containment systems by introducing physical barriers around the aisles

• Seal raised floor systems by plugging unintentional openings (leaks).

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Thermal Impact of Air Management

Thermal Impact of Air Management

Next-to-perfect air management Business-as-usual air management 90°F 100°F 75°F 75°F Copyright (c) 2010 by ANCIS 9

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I N C O R P O R A T E D ®

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Importance of Air Management

• Thermal Management Adequate thermal conditions

Importance of Air Management

Thermal Management. Adequate thermal conditions (server intake temperatures) are important for the reliability and longevity of electronic equipment.

• Energy Management. Air Management helps reduce operating costs by enhancing economizer utilization, improving chiller efficiency, and reducing fan energy. • Capital Management. Improved energy efficiency also p g p gy y

results in reduced capital investments for cooling equipment, air-moving equipment, and real estate.

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Temperature Specifications

(@ Equipment Intake) Min and Max Min and Max

Temperature Specifications

(@ Equipment Intake) Min and Max Recommended

Min and Max Allowable

(Long-Term)

Temperature (°C) Temperature (°C)

Data Centers ASHRAE Telecom NEBS 18° – 27°C 18.33° – 26.67°C 15° – 32°C 5° – 40°C Temperature (°F)

Data Centers ASHRAE Telecom NEBS 64.40° – 80.60°F 65° – 80°F 59° – 89.60°F 41° – 104°F 65 80 F 41 104 F

ASHRAE (2009) Special Publication, Thermal Guidelines for Data Processing Environments; Telcordia (2001)

Generic Requirements NEBS GR-3028-CORE; Telcordia (2006) Generic Requirements NEBS GR-63-CORE. www.ashrae.org www.telcordia.com 11 Copyright (c) 2010 by ANCIS

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Determining Compliance

Determining Compliance

The Rack Cooling Index (RCI)® is a performance metric designed to

The Rack Cooling Index (RCI) is a performance metric designed to

gauge compliance with the thermal guidelines of ASHRAE/NEBS. • RCIRCIHIHI (100% mean no temperatures above max recommended)(100% mean no temperatures above max recommended) • RCILO (100% mean no temperatures below min recommended) Both at 100% mean that all temps are within the recommended p

range, i.e., absolute compliance. The lower the numbers, the greater probability intake temperatures are outside the allowable range.

ASHRAE (2008) Special Publication, Thermal Guidelines for Data Processing Environments. www.ashrae.org

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Rack Cooling Index (RCI)

®

Software

Rack Cooling Index (RCI) Software

RCI Software: http://www.ancis.us/rci.html

13 Copyright (c) 2010 by ANCIS

Rack Cooling Index (RCI) is a Registered Trademark of ANCIS Incorporated

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I N C O R P O R A T E D

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DOE Air Management Tool

DOE Air Management Tool

The DOE Air Management Tool is a free Excel tool for g assessing the data center air-management status and providing recommendations and energy savings.

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Input

First, the user fills in data and answers questions on

Input

four input Excel sheets. Each sheet includes basic guidance for entering the data correctly.

Air Handlers IT-Equipment Room Layout

15 Copyright (c) 2010 by ANCIS

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I N C O R P O R A T E D

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Output

Second, based on the user input, numerical output and

Output

recommended air management actions are given on an output Excel sheet.

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Energy Impact of Air Management

Energy Impact of Air Management

Finally, the percentage energy reduction for fans and chillers are provided on the last sheet.

70-90% 70 90% 15-25% Not including economizers 17 Copyright (c) 2010 by ANCIS

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I N C O R P O R A T E D ®

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Supporting Information

Supporting Information

DOE Air Management Tool has three manuals: • User’s Manual

• Engineering Reference • Data Collection Guide.

Learn more through the DOE DCEP Program. Learn more through the DOE DCEP Program.

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Summary

Summary

‰ Single thermal interface between room and IT-equipmentg q p

‰ Importance of Air Management: Thermal, energy, and capital

‰ Environmental requirements from ASHRAE and NEBS

‰ RCI metric for demonstrating compliance

‰ Unique DOE Air Management Tool

‰ High typical energy savings

‰ High typical energy savings

‰ Web links throughout presentation.

19 Copyright (c) 2010 by ANCIS

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I N C O R P O R A T E D

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THANK YOU

THANK YOU

Magnus K. Herrlin, Ph.D. President ANCIS Incorporated ANCIS Incorporated mherrlin@ancis.us www.ancis.us

About the Author:Magnus K Herrlin Ph D is President of ANCIS Incorporated (www ancis us) San

About the Author:Magnus K. Herrlin, Ph.D., is President of ANCIS Incorporated (www.ancis.us), San Francisco, CA. He is prime developer of the DOE Air Management Tool and lead of the DOE Data Center

References

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