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ENERGY STORAGE

A porous medium for all seasons

The answer to seasonal energy storage and security to support highly renewable power systems could lie deep under the seabed, where compressed air energy storage offers a route to long-term storage at large scales. Now, research models the potential for this in porous rock and finds a large capacity in saline aquifers offshore in the UK.

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Fig. 1: The PM-CAES process offshore.

References

  1. Lott, M. C. & Kim, S.-I. Technology Roadmap: Energy Storage (International Energy Agency, 2014); https://www.iea.org/publications/freepublications/publication/TechnologyRoadmapEnergystorage.pdf

  2. GridWatchUK (GridWatchUK, accessed 13 December 2018); http://www.gridwatch.templar.co.uk/index.php

  3. Succar, S. & Williams, R. Compressed Air Energy Storage: Theory, Resources, and Applications for Wind Power (Princeton Environmental Institute, 2008); https://acee.princeton.edu/wp-content/uploads/2016/10/SuccarWilliams_PEI_CAES_2008April8.pdf

  4. Mouli-Castillo, J. et al. Nat. Energy https://doi.org/10.1038/s41560-018-0311-0 (2019).

  5. Evans, D. et al. Initial studies to derive estimates of potential UK salt cavern volumes and exergy storage (CAES). Energy Superstore http://energysuperstore.org/esrn/wp-content/uploads/2017/01/UKES2016_David-Evans-Initial-Studies-to-Derive-Estimates-of-Potential-UK-Salt-Cavern-Volumes-and-Exergy-Storage.pdf (2016).

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Correspondence to Michelle Bentham.

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Bentham, M. A porous medium for all seasons. Nat Energy 4, 97–98 (2019). https://doi.org/10.1038/s41560-019-0331-4

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