Chasing the clean energy with carbon intelligent computing

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Addressing the challenge of climate change demands a transformation in how the world produces and uses energy. Google is working toward 24×7 carbon-free energy everywhere they have data centres. To achieve 24×7 carbon-free energy, requires the data centres to work more closely with carbon-free energy sources like solar and wind.

“At Google, we were the first major company to be carbon-neutral way back in 2007, and we have been matching 100% of our annual electricity use with renewable energy purchases since 2017,” Ross Koningstein, co-founder, carbon-intelligent computing at Google says. “But we want to go even further. By 2030, we plan to completely decarbonise our electricity use for every hour of every day. One way we can do this is by adjusting our operations in real time so that we get the most out of the clean energy that is already available.

“That is exactly what our newest milestone in carbon-intelligent computing does: Google can now shift moveable compute tasks between different data centres, based on regional hourly carbon-free energy availability. This includes both variable sources of energy such as solar and wind, as well as always-on carbon-free energy such as our recently announced geothermal project. This moves us closer to our goal of operating on carbon-free energy everywhere, at all times, by 2030. 

“Shifting compute tasks across location is a logical progression of our first step in carbon-aware computing, which was to shift compute across time. By enabling our data centres to shift flexible tasks to different times of the day, we were able to use more electricity when carbon-free energy sources like solar and wind are plentiful. Now, with our newest update, we’re also able to shift more electricity use to where carbon-free energy is available.”

The amount of computing going on at any given data center varies across the world, increasing or decreasing throughout the day. The carbon-intelligent platform uses day-ahead predictions of how heavily a given grid will be relying on carbon-intensive energy in order to shift computing across the globe, favouring regions where there is more carbon-free electricity.

“The new platform does all this while still getting everything that needs to get done, done — meaning you can keep on streaming YouTube videos, uploading Photos, finding directions or whatever else,” Koningstein adds. “We are applying this first to our media processing efforts, which encodes, analyses and processes millions of multimedia files like videos uploaded to YouTube, Photos and Drive. Like many computing jobs at Google, these can technically run in many places although of course, limitations like privacy laws apply. Now, Google’s global carbon-intelligent computing platform will increasingly reserve and use hourly compute capacity on the cleanest grids available worldwide for these compute jobs, meaning it moves as much energy consumption as possible to times and places where energy is cleaner, minimizing carbon-intensive energy consumption. Google Cloud’s developers and customers can also prioritize cleaner grids and maximize the proportion of carbon-free energy that powers their apps by choosing regions with better carbon-free energy (CFE) scores.”

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