Today, data centers contain thousands of computer servers that generate lots of heat, which can cause servers to crash. A Microsoft prototype could reduce the need for expensive air-conditioning systems with a data center built hundreds of feet below the surface of the ocean.
Microsoft has tested a prototype of a self-contained data center that can operate hundreds of feet below the surface of the ocean, in an effort to reduce the need for expensive air conditioning.
Today, data centers contain thousands of computer servers that generate lots of heat. When the data centers get too hot, the servers crash. Thermal management is becoming an increasingly important and expensive part of industrial and enterprise computing. Microsoft believes that putting the servers under cold ocean water could cool the data centers without air conditioning. Being heavily reliant on passive cooling means the interfaces must allow excellent thermal conduction away from the heat sources to the environment.
This solution could also address the exponentially growing energy demands of computing, because Microsoft is considering harvesting electricity from the movement of the surrounding sea water. One aspect of the project with the most obvious potential is including either a turbine or a tidal energy system to generate electricity. For years, the main cloud-computing providers have been seeking sites around the world where they can utilize green energy and take advantage of the surrounding environment.
The demand for centralized computing has been growing exponentially. Microsoft manages more than 100 data centers around the globe and is adding more rapidly. The company has spent more than $15 billion on a global data center network. In 2014, engineers in NeXT at Microsoft Research began thinking about a novel approach to accelerate the process of adding new computing power to cloud computing systems.
Microsoft produced a large, white, steel tube, eight feet in diameter, covered with heat exchangers and with ends sealed by metal plates and large bolts. Inside is a single data center computing rack that was bathed in pressurized nitrogen to efficiently remove heat from computing chips. This solution might lead to strands of giant steel tubes linked by fiber optic cables placed on the sea floor or suspended beneath the surface to capture the ocean current with turbines that generate electricity.
The company recently completed a 105-day trial of the steel capsule 30 feet underwater in the Pacific Ocean off the central California coast. The trial proved more successful than expected, even running commercial data-processing projects from Microsoft’s Azure cloud computing service.
The new undersea capsules are designed to be left in place without maintenance for as long as five years. That means the servers, including all the interface materials and adhesives, have to be hardy enough to last five years without needing repairs. That is longer than is currently expected of these materials, and they will have to improve in order to operate for this long in the underwater capsule.
If these data centers do not need maintenance, it becomes possible to redesign their physical alignment. Servers are put in racks so they can be maintained by humans. Without maintenance, it may be possible to re-orient them in a more efficient way.
By using these underwater capsules, it may be possible to shorten the deployment time of new data centers from two years to just 90 days, which would result in a huge cost advantage and much more flexibility.
The underwater server containers could also help make web services work faster. Much of the world’s population now lives in urban centers close to oceans. Data centers are usually built in rural locations where land is cheap. The ability to place computing power nearer to users lowers the latency experienced by users.
Such a radical idea could run into stumbling blocks, including environmental concerns and unforeseen technical issues. The researchers had worried about hardware failures and leaks. The underwater system was outfitted with 100 different sensors to measure pressure, humidity, motion, and other conditions to better understand what it is like to operate in an underwater environment, where on-demand repairs are not possible.
The research group has started designing an underwater system that will be three times as large. It could be built to incorporate an ocean-based alternative-energy system. The Microsoft engineers say they expected a new trial to begin next year, possibly near Florida or in Northern Europe, where there are already extensive ocean energy projects underway.
This article was contributed by Rachel Gordon of IDTechEx.
For more information on better thermal interface materials for industrial computing, click here for the IDTechEx Research report entitled Thermal Interface Materials 2015-2025: Status, Opportunities, Market Forecasts.