Urban underground holds sustainable energy

Vast energy sources are slumbering below big cities. Sustaina-ble energies for heating in winter and cooling in summer may be extracted from heated groundwater aquifers. Researchers from KIT and ETH Zurich developed an analytical heat flux model and found that increasing heat in the underground is mainly caused by an increase in surface temperatures and heat release from buildings. Work of the scientists is now reported in the renowned journal Environmental Science and Technology.

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