The document discusses EPRI's activities to improve energy efficiency in data centers and telecom central offices. It notes that while data centers and central offices share similarities like installing large amounts of IT equipment, they differ in aspects like operating voltages and equipment certifications. The document outlines EPRI's testing of more efficient power supplies and demonstration of air flow management software that saved 23% of energy in a data center. It also shows a comparison of 208 VAC and 380 VDC systems.

1. EPRI Activities for Energy
Efficiency in Data Centers &
Telecom Central Offices
Dennis P. Symanski
Senior Project Manager
27-28APR2010
Nordic Green II
Menlo Park, CA

2. Data Centers versus Telecom Central Offices
Similarities
Both installing lots of IT equipment
Both adding new services & capabilities
(Central Offices looking more & more like Data Centers)
Both are running out of power & cooling & space
Differences
200 to 240 VAC operation versus 48 VDC
Commercial-grade equipment versus NEBS-certified equipment
Modern newer installations versus old/downtown installations
© 2010 Electric Power Research Institute, Inc. All rights reserved. 2

3. Power Supply Retrofits - 80 PLUS Program
Power Supplies are tested and certified at our lab –
vendors are ready to ship
© 2010 Electric Power Research Institute, Inc. All rights reserved. 3

4. Data Centers – Air Flow Management
60
BEFORE DASH™ software started
50
Main breaker, kW
manual control
40
30
• This technology has been 20
demonstrated on CRAC 10
AFTER
systems that use chilled 0
1/31 2/5 2/10 2/15
water, saving 23% of total Balancing Heat and Fan Load
date/time
data center energy –
(Franchise Tax Board,
Sacramento).
© 2010 Electric Power Research Institute, Inc. All rights reserved. 4

5. State-of-the-Art 208 VAC versus 380 VDC
Source: Delta Products Corp
© 2010 Electric Power Research Institute, Inc. All rights reserved. 5

6. Together…Shaping the Future of Electricity
© 2010 Electric Power Research Institute, Inc. All rights reserved. 6