Power Usage Effectiveness (PUE)

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DEFINITION: Power usage effectiveness (PUE) is a metric used to determine the energy efficiency of a data center. PUE is determined by dividing the amount of power entering a data center by the power used to run the computer infrastructure within it. PUE is therefore expressed as a ratio, with overall efficiency improving as the quotient decreases toward 1. PUE was created by members of the Green Grid, an industry  … 
Definition continues below.
Power Usage Effectiveness (PUE)White Papers (View All Report Types)
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The Different Types of UPS Systems
sponsored by APC by Schneider Electric
WHITE PAPER: There is much confusion in the marketplace about the different types of UPS systems and their characteristics. Each of these UPS types is defined, practical applications of each are discussed, and advantages and disadvantages are listed.
Posted: 01 Apr 2010 | Published: 01 Feb 2005

APC by Schneider Electric

Data Center Energy Management and Optimization
sponsored by Viridity Software
WHITE PAPER: To be actionable and effective, data center power optimization requires accurate measuring, modeling, trending, and analysis. Read this white paper to learn how accurate energy measurements can provide a quantum leap over current methods in helping data center energy optimization.
Posted: 31 Mar 2010 | Published: 31 Mar 2010

Viridity Software

Allocating Data Center Energy Costs and Carbon to IT Users
sponsored by APC by Schneider Electric
WHITE PAPER: This paper provides an overview of energy cost and carbon allocation strategies and their precision. We show that it is both easy and inexpensive for any data center, large or small, new or old, to get started allocating costs and carbon, but the expense and complexity escalate and ROI declines when excessive precision is specified.
Posted: 28 Jan 2010 | Published: 28 Jan 2010

APC by Schneider Electric

Guidance for Calculation of Efficiency (PUE) in Real Data Centers
sponsored by APC by Schneider Electric
WHITE PAPER: Unfortunately, commonly published efficiency data is not computed using a standard methodology making it difficult to properly benchmark infrastructure efficiency in data centers. This paper explains the problem and describes a standardized method for classifying data center loads for efficiency calculations.
Posted: 28 Jan 2010 | Published: 28 Jan 2010

APC by Schneider Electric
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POWER USAGE EFFECTIVENESS (PUE) DEFINITION (continued): …  group focused on data center energy efficiency. Data center infrastructure efficiency (DCIE) is the reciprocal of PUE and is expressed as a percentage that improves as it approaches 100%. How to Determine PUE1. Take a measurement of energy use at or near the facility's utility meter. If the data center is in a mixed-use facility or office building, take a measurement only at the meter that is powering the data center. If it is not on a separate utility meter, estimate the amount of power being consumed by the non-data center portion of the building and remove it from the equation. 2. Measure the … 
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