Using Sedimentary Basin Geothermal Resources to Provide Long-Duration Energy Storage
- Conference Paper
Rights / licenseIn Copyright - Non-Commercial Use Permitted
Our prior work developed CO2-Bulk Energy Storage (CO2-BES), which uses geothermal power plants and sedimentary basin geothermal resources to time-shift electricity production. In this study, we investigate the maximum duration over which CO2-BES can time-shift electricity generation because there is increasing evidence that, in addition to shorter-duration energy storage approaches, like batteries, energy storage approaches capable of time-shifting electricity generation over long-durations (>10 hours) or even over seasons will be needed in future decarbonized electricity systems. We use an integrated model that we developed and characterized with specific facility-level assumptions to simulate CO2-BES operation and find that a CO2-BES facility operating under these specific assumptions can time shift electricity over durations of at least one week and likely multiple weeks. Time-shifting electricity generation over longer durations (e.g., one month) depletes subsurface overpressure enough that brine flashes in the production well, but durations longer than a couple weeks are likely possible with different facility-level assumptions. Towards this possibility, we conclude with a few ideas for future work that could enable seasonal energy storage with CO2-BES. Overall, this study suggests that CO2-BES specifically, and sedimentary basin geothermal resources generally, can provide long-duration energy storage and show promise for providing seasonal energy storage. Show more
Pages / Article No.
PublisherETH Zurich, Institute of Geophysics
SubjectSedimentary basin geothermal; CCS; CCUS; Energy storage; Long-duration energy storage
Organisational unit09494 - Saar, Martin O. / Saar, Martin O.
NotesConference lecture held on May 12, 2021. Due to the Coronavirus (COVID-19) the conference was rescheduled from April 26 – May 2, 2020 to May 21–26, 2021, and to October 24–27, 2021
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