Data Center Journal

Volume 27 | May 2013

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Advertorial Ensuring an always-on data center has the highest operational efficiency 2 Why the power to save energy goes beyond eco-mode BY PETER PANFIL In today's always-on, always efficient data center 3 environments, it's easy to get caught up in the numbers, especially when it comes to UPS performance. Availability is the highest priority of any data center, and the UPS system is the keystone that ensures the data center is always powered. At the same time, cost savings and energy efficiency are common business priorities. When planning for a UPS, it pays to consider multiple efficiency strategies that will effectively support availability requirements. TOTAL DATA CENTER ENERGY CONSUMPTION Support systems IT equipment AVOID THE RATINGS GAME Thanks to advances in UPS technology, the potential to cut energy costs by tens of thousands of dollars annually has never been greater. But don't be swayed by a 1 or 2% efficiency difference unless availability for the data center is the same for each UPS option. By the Numbers* 48% HIGHER VOLTAGE = BIGGER SAVINGS It might sound strange to think that increasing your system level voltage can actually save money, but it can — and a lot of it. 575/600VAC from the source, through the UPS and distribution, uses more of the available capacity of gear, breakers and wiring. Adding a PDU that compartmentalizes faults and runs the IT equipment at its highest efficiency point delivers the most bang for the buck. THINK ECO-INTELLIGENT Eco-mode has done wonders for improving UPS efficiency, but it comes with a cost: some methods of switching to eco-mode and back again may leave availability vulnerable. Ask the UPS supplier to explain how the equipment safely switches to and from eco-mode, and ask to see the waveform at the point of transfer to ensure that the power is free of disruptive notches. Energy use of infrastructure equipment CH3 CH5 — cooling, UPS, PDU CH7 and lighting 56% Growth rate of electricity consumption globally between 2005 and 2010 $6K Estimated cost to operate CH6 CH8 a server annually in a typical data center 6-7% Estimated savings achieved by deploying a UPS with higher voltage and Intelligent Eco-mode CH4 *Citations from Energy Logic 2.0; Growth in Data Center Electricity Use 2005 to 2010; and VMware TCO Calculator The Liebert NXL™ from Emerson Network Power is the most efficient and reliable high-power UPS system available, due to input and output isolation, superior fault management and efficiency improvement features like Intelligent Eco-mode™ with active inverter technology. 1000.0V 980.0V 1000.0V -1000.0V -1020.0V -1000.0V 980.0V 1000.0V 1000.0V X1 X2 4X 1/4X -653.8ms -653.2ms 600us 1.666667kHz When transferring to eco-mode, make sure the UPS provides a continuous, uninterrupted waveform - interrupted transfer notches are potentially disruptive to operation. About the Author: Peter Panfil is Vice President of Liebert AC Power, Emerson Network Power Find out how you can save thousands each year in reduced power consumption. Go to EmersonNetworkPower.com/KnowUPS to access our resource center and checklist Emerson, Emerson Network Power, and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. All other brand names, product names, and logos are the property of their respective owner. © 2013 Liebert Corporation. www.datacenterjournal.com THE DATA CENTER JOURNAL | 15

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