"We are able to get 85-degree water [Fahrenheit] in Phoenix 24/7," Lewis said.
Lewis said the condenser water that was open to the air isn't directly used, but instead run through a heat exchanger, which shaves off a couple of degrees. On the warmest days, the system can deliver 87-degree water "anywhere on the floor, anytime, and the majority of the year it's much better than that," Lewis said.
Other energy-saving measures employed include the use of LED lights, Lewis said. Photos of the facility under construction are posted on Data Center Pulse, a nonprofit industry group.
EBay is shooting for a low Power Usage Effectiveness figure, which is a ratio that compares the total power used by a facility to the power used by its equipment. The lower the number, the better. Not long ago, data centers routinely had PUEs of 2.0 or higher, but new custom-built ones are below 1.5
Lewis said eBay would like its latest center to have a PUE of 1.1. Although the center is running, Lewis said his boss would not let him release the figure. It was marked "confidential" on his slides. But he expects the figured to be released when the data center is formally opened in a couple of weeks.
"Unfortunately for you guys, I apologize," Lewis said to attendees.
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