Mountain Tunnels Store Compressed Air and Heat
Initial investigations have indicated that compressed air storage may be economical, which goes to show that this system, with its low
Additionally, Rotta Loria (2021) evaluated the potential of energy tunnels as underground thermal energy storage systems and discovered that storage efficiencies could reach up to 70%.
A typical energy tunnel system is schematically depicted in Fig. 3. The tunnel lining has heat absorber pipes installed and an internal circulating fluid that facilitates heat exchange with the ground and tunnel air (primary circuit).
Challenges and recommendations for future research are identified. The thermal activation of underground tunnels, also known as energy tunnels, has shown significant potential to harness geothermal and aerothermal energy as a low-carbon and economical solution for space heating and cooling, water heating and road de-icing.
a small compressed air energy storage system integrated with a stand-alone renewable power plant. Journal of Energy Storage 4, 135-144. energy storage technology cost and performance asse ssment. Energy, 2020. (2019). Inter-seasonal compressed-air energy storage using saline aquifers. Nature Energy, 4 (2), 131- 139. Parsons, W. (2015).
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