Antinuclear

Australian news, and some related international items

The huge carbon footprint of digital data centres – consuming vast amounts of electricity

Energy Hogs: Can World’s Huge Data Centers Be Made More Efficient?
The gigantic data centers that power the internet consume vast amounts of electricity and emit 3 percent of global CO2 emissions. To change that, data companies need to turn to clean energy sources and dramatically improve energy efficiency.
Yale  Environment 360   

The cloud is coming back to Earth with a bump. That ethereal place where we store our data, stream our movies, and email the world has a physical presence – in hundreds of giant data centers that are taking a growing toll on the planet.

Data centers are the factories of the digital age. These mostly windowless, featureless boxes are scattered across the globe – from Las Vegas to Bangalore, and Des Moines to Reykjavik. They run the planet’s digital services. Their construction alone costs around $20 billion a year worldwide.

The biggest, covering a million square feet or more, consume as much power as a city of a million people. In total, they eat up more than 2 percent of the world’s electricity and produce 3 percent of CO2 emissions, as much as the airline industry. And with global data traffic more than doubling every four years, they are growing fast.

Yet if there is a data center near you, the chances are you don’t know about it. And you still have no way of knowing which center delivers your Netflix download, nor whether it runs on renewable energy using processors cooled by Arctic air, or runs on coal power and sits in desert heat, cooled by gigantically inefficient banks of refrigerators.

We are often told that the world’s economy is dematerializing – that physical analog stuff is being replaced by digital data, and that this data has minimal ecological footprint. But not so fast. If the global IT industry were a country, only China and the United States would contribute more to climate change, according to a Greenpeace report investigating “the race to build a green internet,” published last year.

Storing, moving, processing, and analyzing data all require energy. Lots of it. The processors in the biggest data centers hum with as much energy as can be delivered by a large power station, 1,000 megawatts or more. And it can take as much energy again to keep the servers and surrounding buildings from overheating.

Almost every keystroke adds to this. Google estimates that a typical searchusing its services requires as much energy as illuminating a 60-watt light bulb for 17 seconds and typically is responsible for emitting 0.2 grams of CO2. Which doesn’t sound a lot until you begin to think about how many searches you might make in a year.

And these days, Google is data-lite. Streaming video through the internet is what really racks up the data count. IT company Cisco, which tracks these things, reckons video will make up 82 percent of internet traffic by 2021, up from 73 percent in 2016. Around a third of internet traffic in North America is already dedicated to streaming Netflix services alone.

Two things matter if we are to tame these runaway beasts: One is making them use renewable or other low-carbon energy sources; the other is ramping up their energy efficiency. On both fronts, there is some good news to report. Even Greenpeace says so. “We are seeing a significant increase in the prioritization of renewables among some of the largest internet companies,” last year’s report concluded.

More and more IT companies are boasting of their commitment to achieving 100 percent reliance on renewable energy. To fulfil such pledges, some of the biggest are building their own energy campuses. In February, cloud giant Switch, which runs three of the world’s top 10 data centers, announced plansfor a solar-powered hub in central Nevada that will be the largest anywhere outside China.

More often, the data titans sign contracts to receive dedicated supply from existing wind and solar farms. In the U.S., those can still be hard to come by. The availability of renewable energy is one reason Google and Microsoft have recently built hubs in Finland, and Facebook in Denmark and Sweden. Google last year also signed a deal to buy all the energy from the Netherlands’ largest solar energy park, to power one of its four European data centers.

Of the mainstream data crunchers for consumers, Greenpeace singled out Netflix for criticism. It does not have its own data centers. Instead, it uses contractors such as Amazon Web Services, the world’s largest cloud-computing company, which Greenpeace charged with being “almost completely non-transparent about the energy footprint of its massive operations.” Amazon Web Services contested this. A spokesperson told Yale Environment 360 that the company had a “long-term commitment to 100 percent renewable energy” and had launched a series of wind and solar farm projects now able to deliver around 40 percent of its energy. Netflix did not respond to requests for comment.

Amazon Web Services has some of its largest operations in Northern Virginia, an area just over the Potomac River from Washington D.C. that has the largest concentration of data centers in the world. Virginia gets less than 3 percent of its electricity from renewable sources, plus 33 percent from nuclear, according to Greenpeace.

Some industry insiders detect an element of smoke and mirrors in the green claims of the internet giants. “When most data center companies talk about renewable energy, they are referring to renewable energy certificates,” Phillip Sandino, vice-president of data centers at RagingWire, which has centers in Virginia, California, and Texas, claimed in an online trade journal recently. In the U.S. and some other countries, renewable energy certificates are issued to companies generating renewable energy for a grid, according to the amount generated. The certificates can then be traded and used by purchasers to claim their electricity is from a renewable source, regardless of exactly where their electricity comes from. “In fact,” Sandino said, “the energy [the data centers] buy from the power utility is not renewable.”

Others, including Microsoft, help sustain their claims to carbon neutrality through carbon offsetting projects, such as investing in forests to soak up the CO2 from their continued emissions.

All this matters because the differences in carbon emissions between data centers with different energy sources can be dramatic, says Geoff Fox, innovation chief at DigiPlex, which builds and operates centers in Scandinavia. Using data compiled by Swedish state-owned energy giant Vattenfall, he claims that in Norway, where most of the energy comes from hydroelectricity, generating a kilowatt-hour of electricity emits only 3 grams of CO2. By comparison, in France it is 100 grams, in California 300 grams, in Virginia almost 600 grams, in New Mexico more than 800 grams.

Meanwhile, there is growing concern about the carbon footprint of centers being built for Asian internet giants such as Tencent, Baidu, and Alibaba in China; Naver in South Korea; and Tulip Telecom in India. Asia is where the fastest global growth in data traffic is now taking place. These corporations have been tight-lipped about their energy performance, claims Greenpeace. But with most of the region’s energy coming from coal-fired power stations, their carbon footprint cannot be anything but large.

Vattenfall estimates the carbon emissions in Bangalore, home of Tulip’s giant Indian data center, at 900 grams per kilowatt-hour. Even more troubling, the world’s largest center is currently the Range International Information Hub, a cloud-data store at Langfang near the megacity of Tianjin in northeast China, where it takes more than 1,000 grams of CO2 for every kilowatt-hour.

Almost as important as switching data centers to low-carbon energy sources is improving their energy efficiency. Much of this comes down to the energy needed to keep the processors cool. Insanely, most of the world’s largest centers are in hot or temperate climates, where vast amounts of energy are used to keep them from overheating. Of the world’s 10 largest, two are in the desert heat of Nevada, and others are in Georgia, Virginia, and Bangalore.

Most would dramatically reduce their energy requirements if they relocated to a cool climate like Scandinavia or Iceland. One fast-emerging data hub is Iceland, where Verne Global, a London company, set up its main operation.

…….. Greenpeace says the very size of the internet business, and its exposure to criticism for its contribution to climate change, has the potential to turn it from being part of the problem to part of the solution. Data centers have the resources to change rapidly. And pressure is growing for them to do so.The hope is that they will bring many other giant corporations with them. “The leadership by major internet companies has been an important catalyst among a much broader range of corporations to adopt 100 percent renewable goals,” says Gary Cook, the lead author of the Greenpeace report. “Their actions send an important market signal.”

But the biggest signal, says Fox, will come from us, the digital consumers. Increasingly, he says, “they understand that every cloud lives inside a data center. And each has a different footprint.” We will, he believes, soon all demand to know the carbon footprint of our video streams and internet searches. The more far-sighted of the big data companies are gearing up for that day. “I fully expect we may see green labelling for digital sources as routine within five years.” https://e360.yale.edu/features/energy-hogs-can-huge-data-centers-be-made-more-efficient

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April 4, 2018 - Posted by | General News

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