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- 200 billion Twh energy use
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The world's data centres use around 200 billion terawatt hours of electricity each year. The use has been constant but there has been a big change in the types of data centres, which are divided into traditional, cloud and hybrid storage.
- More efficient data centres but slow change
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Other places besides Trondheim are testing out liquid-cooled data centres too. The US Department of Energy (DOE ) handed out 40 million dollars to 15 research projects on 9 May this year.
Data centres spend 2 per cent of the total global electricity consumption. 40 per cent of this is spent on cooling, on average.
Data centre efficiency is measured in Power Usage Effectiveness (PUE). A PUE of 2.0 means for each watt spent running the servers where data is stored, one watt is being used for cooling. The goal is to get as close to a PUE of 1.0 as possible. Today, the figure for data centres globally is 1.55 according to Statista.
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