Integrating CO2 storage with geothermal resources for dispatchable renewable electricity

Thomas A. Buscheck, Jeffrey M. Bielicki, Mingjie Chen, Yunwei Sun, Yue Hao, Thomas A. Edmunds, Martin O. Saar, Jimmy B. Randolph

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

We present an approach that uses the huge fluid and thermal storage capacity of the subsurface together with geologic CO2 storage, to harvest, store, and dispatch energy from subsurface (geothermal) and surface (solar, nuclear, fossil) thermal resources, as well as energy from electrical grids. Captured CO2 is injected into saline aquifers to store pressure, generate artesian flow of brine, and provide an additional working fluid for efficient heat extraction and power conversion. Concentric rings of injection and production wells are used to create a hydraulic divide to store pressure, CO2, and thermal energy. Such storage can take excess power from the grid and excess/waste thermal energy and dispatch that energy when it is demanded, enabling increased penetration of variable renewables. Stored CO2functions as a cushion gas to provide enormous pressure-storage capacity and displaces large quantities of brine, which can be desalinated and/or treated for a variety of beneficial uses. Geothermal power and energy-storage applications may generate enough revenues to justify CO2 capture costs.

Original languageEnglish
Title of host publicationEnergy Procedia
PublisherElsevier Ltd
Pages7619-7630
Number of pages12
Volume63
DOIs
Publication statusPublished - 2014
Event12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014 - Austin, United States
Duration: Oct 5 2014Oct 9 2014

Other

Other12th International Conference on Greenhouse Gas Control Technologies, GHGT 2014
CountryUnited States
CityAustin
Period10/5/1410/9/14

Keywords

  • Brine utilization
  • Bulk energy storage
  • CO utilization
  • Geologic CO storage
  • Geothermal energy
  • Parasitic load
  • Thermal energy storage

ASJC Scopus subject areas

  • Energy(all)

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  • Cite this

    Buscheck, T. A., Bielicki, J. M., Chen, M., Sun, Y., Hao, Y., Edmunds, T. A., Saar, M. O., & Randolph, J. B. (2014). Integrating CO2 storage with geothermal resources for dispatchable renewable electricity. In Energy Procedia (Vol. 63, pp. 7619-7630). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2014.11.796