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Power usage effectiveness (PUE) or power unit efficiency is a ratio that describes how efficiently a computer data center uses energy; specifically, how much energy is used by the computing equipment (in contrast to cooling and other overhead that supports the equipment).
It is an addition to the power usage effectiveness (PUE) definition and was first proposed by Greenqloud. [1] The Green Grid has developed the Power Usage Effectiveness metric [2] or PUE to measure a data centers' effectiveness of getting power to IT equipment. What the PUE tells in simple terms is how much extra energy is needed for each ...
The best PUE a data center can have is 1: an ideal situation, with no extra energy use. When PUE was introduced, studies found that the industry-average PUE was between 2.5 and 3. In more recent studies, the average PUE fell to about 1.7 by using this framework. PUE began the shift of the data-center industry towards energy efficiency. [5]
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The perfect efficiency would be a Power usage effectiveness (PUE) of 1.0. [ 11 ] The POD 240a has a refrigerant-based air cooled HVAC system with air-side economization [ 3 ] When the ambient air conditions are cool enough, the 240a uses economizer or free air mode—where outside air can be taken in and circulated inside the modular data ...
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