It’s waste week. As part of the campus mining walk I did during our DFG waste network meeting, we had a super lucky surprise meetup with a Fraunhofer project: next to the uni #datacenter, they are drilling into an abandoned mine to store heat from the nearby technical center (and data center), and the exploration was happening while we were they. We got a tour!!!

Our Ruhr University campus is so strange, mining, post-mining, PCB, many things happening at once

Danger signs This is a special drill going underground, searching for an old mine where excess heat is to be stored. A century ago. was used for coal mining, and the Nazis also used it for doing secret engineering work. Now, it's getting a third life as a renewable energy facility