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 Credit: 3M

Energy bills for data centres can account for almost one third the costs of building a facility and running it long term.

A significant amount of the electricity used within a data centre powers its cooling, and there is a perennial effort to find more efficient ways to stop servers overheating. Web giants such as Facebook and Google are leading this efficiency drive, running their data centres with a Power Usage Effectiveness (PUE) that hovers around 1.1, strides ahead of a global average of 1.8. The pair have cut power consumption ...

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