Innovative waste heat recovery experiment in Sweden

https://techxplore.com/news/2022-04-recovery-sweden.html

"smaller heat-reuse cycle within the two containers. The heat generated from the Submer liquid immersion cooling tank inside the data center container is used to preheat the air intake for the fuel cells... return water loop from the CDU in the Submer setup will be around 50 degrees Celsius... fuel cells consume air to function, but this air is best at 35 degrees Celsius, so the outside air (-25 degrees Celsius to 25 degrees Celsius) will be heated up by the heat from the Submer system"

Related:

Thermally regenerative battery produces ample energy using low-grade waste heat

https://www.psu.edu/news/earth-and-mineral-sciences/story/thermally-regenerative-battery-produces-ample-energy-using-low/

Global experts propose a path forward in generating clean power from waste energy

https://www.sfu.ca/sfunews/stories/2023/03/global-experts-propose-a-path-forward-in-generating-clean-power-.html

The impact of thermal drawdown-induced alterations in rock thermal properties on heat recovery

https://phys.org/news/2023-05-impact-thermal-drawdown-induced-properties-recovery.html

Most data lives in the cloud. What if it lived under the sea?

https://techxplore.com/news/2023-10-cloud-sea.html