Data centers make heat all year long – here’s how the ground can hold onto it until winter

By Moones Alamooti, Assistant Professor of Energy and Petroleum Engineering, University of North Dakota

You have probably noticed it on a hot summer day: A basement feels cool even when the air outside is baking. The ground does not heat up and cool down as fast as the air does. A few hundred feet down, it stays close to the local yearly average all year, which can be around 50 degrees Fahrenheit (10 Celsius).

In Verona, Wisconsin, the health software company Epic Systems has spent two decades turning that fact into infrastructure. It has drilled roughly 6,100 wells, 300 to 800 feet (90 to 240 meters)…

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