The Green Grid › CaseStudyROIofCoolingSystemEnergyEfficiencyUpgrades

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Operations

09 June, 2011

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Contributors:
Tom Brey, IBM
Pamela Lembke, IBM
Joe Prisco, IBM
Ken Abbott, Emerson
Dominic Cortese, Emerson
Kerry Hazelrigg, Disney
Jim Larson, Disney
Stan Shaffer, MSI
Travis North, Chatsworth Products
Tommy Darby, Texas Instruments

Data center managers and operators want to operate their facilities more efficiently, but struggle to justify the business return on various energy savings investments. They lack the capability to cite vendor independent studies that provide the relative importance and savings those changes provide. The Green Grid and a Green Grid member company (hereinafter referred to as MC) have evaluated a number of energy efficiency upgrades made by the MC within a production data center. The results of this study should help data center operators worldwide determine the return on investment (ROI) of specific investments and the relative value of each upgrade.

Re: CRAH Configuration

Hello John, This is not a ceiling return air plenum with ducts. Air is delivered under a raised floor and returned above floor to room perimeter CRAHs.

Posted at 08:20 AM on November 03, 2011 by Kerry Hazelrigg

CRAH Configuration

Does this datacenter have a ceiling return air plenum with the return air to the CRAH units ducted down from the ceiling? It sounds like you have that rather than the older style of open return air grills underneath the ceiling.

Posted at 01:08 PM on October 28, 2011 by John Weems

Mistakes

Nice report. But there are many mistakes in the report. There are wronge references on page 34 & 33. The numbering of the figure is without a system. There is figure 146 & 157 but in the text the figure 17 is mentioned. There aremany more figure with this mistake. The x-axis label for the time of day is not usable. The text says that at 1600 hours there is a peak load on figure 134 (Page 31, text reference figure 15). But there is no 1600 hours on the x-axis label only 1424 and 1912. So the figure is unreadable. The report is using a normalized PUE but there is no equation for the normalized PUE. How is the normalized PUE calculated? Sincerly Fridtjof Chwoyka

Posted at 03:30 AM on June 24, 2011 by Fridtjof Chwoyka

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WP#39-Case Study: The ROI of Cooling System Energy Efficiency Upgrades

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Re: CRAH Configuration

CRAH Configuration

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