Renewable energy is tough to store—but a potential solution could be right under our feet.
in significant energy losses. Perera says more research funding can help identify the broader potential of thermal energy storage technologies.
“Compared to conventional groundwater heat pumps, the extraction of heated or cooled groundwater which was previously injected into the subsurface enables a more efficient operation,” says Ruben Stemmle, a researcher from the Karlsruhe Institute of Technology ’s Institute of Applied Geosciences in Germany who was not involved in the study. ATES systems can also store excess heat from industrial processes, combined heat and power plants, or solar thermal energy.
Long-term seasonal storage and demand-driven utilization of previously unused heat sources, like waste heat or excess solar thermal energy, can promote the decarbonization of the heating and cooling sector, as well as reduce primary energy consumption, says Stemmle.the flexibility of the energy system, allowing it to withstand fluctuations in renewable energy demand and generation from future climate variations.
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