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Data center facilities are heavy consumers of energy, accounting for between 1.1% and 1.5% of the world's total energy use in 2010 [1]. The U.S. Department of Energy estimates that data center facilities consume up to 100 to 200 times more energy than standard office buildings.&lt;ref name="https://energy.gov"&gt;“Best Practices Guide for Energy-Efficient Data Center Design”, prepared by the National Renewable Energy Laboratory for the U.S. Department of Energy, Federal Energy Management Program, March 2011. &lt;/ref&gt;